EP3204530A1 - Produit plat en acier laminé à froid et recuit avec recristallisation et procédé de production dudit produit - Google Patents

Produit plat en acier laminé à froid et recuit avec recristallisation et procédé de production dudit produit

Info

Publication number
EP3204530A1
EP3204530A1 EP15762569.0A EP15762569A EP3204530A1 EP 3204530 A1 EP3204530 A1 EP 3204530A1 EP 15762569 A EP15762569 A EP 15762569A EP 3204530 A1 EP3204530 A1 EP 3204530A1
Authority
EP
European Patent Office
Prior art keywords
flat steel
steel product
flat
product
steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP15762569.0A
Other languages
German (de)
English (en)
Other versions
EP3204530B2 (fr
EP3204530B1 (fr
Inventor
Marc Blumenau
Jörg STEINEBRUNNER
Udo ZOCHER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ThyssenKrupp Steel Europe AG
ThyssenKrupp AG
Original Assignee
ThyssenKrupp Steel Europe AG
ThyssenKrupp AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=51743278&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP3204530(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ThyssenKrupp Steel Europe AG, ThyssenKrupp AG filed Critical ThyssenKrupp Steel Europe AG
Priority to PL15762569.0T priority Critical patent/PL3204530T5/pl
Publication of EP3204530A1 publication Critical patent/EP3204530A1/fr
Application granted granted Critical
Publication of EP3204530B1 publication Critical patent/EP3204530B1/fr
Publication of EP3204530B2 publication Critical patent/EP3204530B2/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for drawing, e.g. for deep-drawing
    • C21D8/0447—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for drawing, e.g. for deep-drawing characterised by the heat treatment
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for drawing, e.g. for deep-drawing
    • C21D8/0421—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for drawing, e.g. for deep-drawing characterised by the working steps
    • C21D8/0436—Cold rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for drawing, e.g. for deep-drawing
    • C21D8/0421—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for drawing, e.g. for deep-drawing characterised by the working steps
    • C21D8/0442—Flattening; Dressing; Flexing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/04—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for drawing, e.g. for deep-drawing
    • C21D8/0447—Modifying the physical properties of ferrous metals or ferrous alloys by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for drawing, e.g. for deep-drawing characterised by the heat treatment
    • C21D8/0473—Final recrystallisation annealing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D3/00—Electroplating: Baths therefor
    • C25D3/02—Electroplating: Baths therefor from solutions
    • C25D3/22—Electroplating: Baths therefor from solutions of zinc
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D2211/00—Microstructure comprising significant phases
    • C21D2211/005—Ferrite

Definitions

  • the invention relates to a cold-rolled and
  • the invention relates to a method for producing a flat steel product of the type in question.
  • Steel flat products intended for bodywork or similar applications are typically provided with a surface texture characterized by a defined roughness and an equally defined surface roughness Peak distribution is characterized in order to meet the requirements regarding the formability and surface appearance (paintability and gloss) existing customer requirements.
  • a typical example of corresponding specifications from the automotive industry is an arithmetic center roughness (hereinafter referred to as "roughness") Ra of 1.1-1.6 ⁇ m at a peak number RPc of at least 60 1 / cm.
  • the roughness Ra and the peak number RPc are determined in accordance with the steel iron test sheet SEP 1940 using a stylus cutter according to ISO 3274.
  • Wsa waviness characteristic Wsa (1-5)
  • Wsa steel Iron Test Sheet SEP 1941: 2012-05 after 5% plastic strain in the Marciniak creep test.
  • Typical requirements are Wsa values of 0.35 ym to 0.40 ym.
  • Particularly good gloss is obtained at Wsa values of ⁇ 0.35 ⁇ m, in particular ⁇ 0.30 ⁇ m.
  • peak numbers RPc of at least 75 l / cm and roughnesses Ra of 0.9-1.4 ⁇ m are required.
  • Position sensors are provided in front of and behind the
  • Rolling mill determines in which the flat steel product
  • Tips reduced. To make matters worse, the fact that already in the dry-passing during the transfer of existing on the roll surface tips on each rolled flat steel product
  • the Degree of D can also with regard to
  • Energy beam is generated a regular pattern of wells.
  • the flat steel product to be processed is tempered by means of two work rolls, of which at least one is machined in the manner indicated above.
  • Neck reduction should not be less than 0.3% to the pattern of the work roll on the
  • trapezoidal land portions having a flat upper surface, groove-like recessed portions formed to form a land portion
  • Elevation areas outside of the recessed areas are formed so that they are higher than the bottom of the
  • the steel sheet consists of a steel in wt .-%, 0,10% or less C, 0.05% or less Si, 0.1 - 1.0% Mn, 0.05% or less P, 0, 02% or less S, 0.02-0.10% Al, less than 0.005% N and balance of Fe and unavoidable impurities.
  • the steel sheet thus obtained becomes an annealing treatment
  • Annealed annealing temperature of 730 - 850 ° C and then cooled to a maximum of 600 ° C temperature with a cooling rate of at least 5 ° C / s is cooled.
  • the cold rolled annealed flat steel product obtained thereafter has a mainly ferrite structure having an average crystal grain diameter of 5 to 30 ⁇ m.
  • the flat steel product is rollformed using a roll whose
  • the object of the invention was to provide a flat steel product which has an optimized
  • the invention has achieved this object by providing such a flat steel product according to claim 1.
  • the steel additionally optional
  • Alloy elements may contain:
  • a flat steel product according to the invention thus consists of a soft steel which has a yield strength Rp0.2 of up to 180 MPa, in particular of less than 150 MPa
  • Elongation at break A80 of at least 40% has a high elongation and a high n-value of at least 0.23. With this property combination he is for a forming,
  • a flat steel product according to the invention has a by an arithmetic center roughness Ra of
  • An inventive flat steel product has its
  • Coating can be applied. By applying known electrolytic processes, it is ensured that the surface structure of the present invention is dressed
  • passive layer eg. B. as
  • Surface texture is characterized by a stochastic distribution of the pits and peaks which determine the roughness value Ra according to the invention and the tip number RPc according to the invention.
  • Stochastic surface textures are irregular
  • deterministic surface textures are regular surface textures characterized by a regular distribution of similar design features.
  • the invention seeks to optimize the friction behavior between steel surface and tool during forming processes in the oiled or greased state.
  • a tool-based forming process especially during deep ⁇ or stretch, stands out a stochastic
  • Coatings which, if necessary, can additionally be applied to the flat steel product according to the invention.
  • the roughness value Ra should in the inventive
  • Surface of a flat steel product according to the invention should not be less than 0.8 ym, otherwise the surface is too smooth.
  • the roughness value Ra should, however, also be no greater than 1.6 .mu.m, because the surface is then too rough to achieve optimized forming properties.
  • roughness values Ra of 0.9-1.4 ⁇ m can be provided.
  • the peak number RPc should not be less than 75 per cm, because this would have a negative effect on the Wsa value.
  • provided flat steel product surface is set to at least 80 per cm.
  • Wsa values of less than 0.30 ⁇ m can be guaranteed by the fact that for the peak number RPc a minimum value of 90 per cm
  • An inventive flat steel product contains as
  • the C content of the flat steel product according to the invention is 0.0001 - 0.003 wt .-%.
  • C is inevitably contained in the molten steel, so that C contents of at least 0.0001 wt .-% are always detectable in a steel according to the invention.
  • a C content above 0.003% by weight deteriorates the intended reformability due to an excessive solidification contribution of the carbon. This can surely be prevented by lowering the C content to 0.002 wt% or less.
  • Si is present in a flat steel product of the invention at levels of 0.001-0.025 wt%. Also Si is inevitably contained in the molten steel. However, an Si content above the limit of 0.025% by weight according to the invention deteriorates the formability due to an excessive solidification contribution. In order to avoid negative influences of the presence of Si, the Si content of a flat steel product according to the invention may be limited to at most 0.015% by weight.
  • Mn is present in a steel flat product according to the invention in amounts of 0.05-0.20% by weight. Mn contents which are in this range contribute optimally to the formability of a flat steel product according to the invention. If the Mn contents are outside the range prescribed according to the invention, too little or too much will result due to solid solution hardening. An optimal influence of the presence of Mn in the invention
  • the P content can be limited to at most 0.012 wt .-%.
  • AI is in a steel flat product according to the invention in Levels of 0.02-0.055 wt% present. Al is used in steel production to calm the molten steel and must therefore within the limits of the invention
  • the positive influence of Al in the alloy of a flat steel product according to the invention can be optimally utilized by limiting the Al content to at most 0.03% by weight.
  • Ti is present in a flat steel product of the invention at levels of 0.01-0.1 wt%. Ti serves to bond interstitial alloying elements and thus contributes to precipitation hardening. At a Ti content of less than 0.01 wt .-% are interstitial
  • Alloy elements continue to be dissolved in the crystal lattice before, which has a negative effect on the desired forming capacity
  • Cr can be present in amounts of 0.001-0.05% by weight "6". steel flat product according to the invention are added, so that the presence of Cr at such low
  • V can optionally be molten steel
  • V can be present in the flat steel product according to the invention in contents of up to 0.005% by weight.
  • Mo may optionally be present at levels of up to 0.015% by weight in the flat steel product of the present invention to serve for solid solution strengthening.
  • a Mo content above the limit of the invention deteriorates the intended formability.
  • N can additionally be formed by TiN formation
  • the optional N content is optimally limited to at most 0.003 wt% in order to achieve the desired forming properties to back up .
  • Steel flat product according to the invention may be present. These include B, Cu, Nb, Ni, Sb, Sn and S, the total amount of which should be at most 0.2% by weight, in the case of
  • Nb, B or Sb for these impurities following special conditions apply: Sb content at most 0.001 wt .-%, Nb content at most 0.002 wt .-% and B content at most 0.0005 wt .-%.
  • Steel flat products produced according to the invention can be reliably produced, for example, by the method of production according to the invention.
  • the process according to the invention for producing a flat steel product according to the invention comprises for this purpose
  • Alloy elements may contain:
  • N 0.001-0.004%; heat-treating the flat steel product in a continuous flow through an annealing furnace under an annealing atmosphere consisting of 1 to 7% by volume of H2 at a dew point of -10 ° C to -60 ° C and the balance of N2 and unavoidable impurities;
  • Aging end temperature T3 is cooled from 250 to 350 ° C, and - wherein the flat steel product after cooling to the final aging temperature T3 with a
  • Cooling rate CR3 of 1.5 - 5.0 ° C / s is cooled to room temperature; c) temper rolling of the recrystallizing annealed
  • Flat-rolled steel product with a degree of dressing D of 0.4-0.7% using a skin pass mill its peripheral surface coming into contact with the flat steel product has an arithmetic mean roughness Ra of 1.0-2.5 ym and a peak RPc of at least 100 l / cm, wherein the center roughness Ra and the peak number RPc conditional in the surface of the
  • Dressing work roll molded depressions and tips are stochastically distributed.
  • step b) of the method according to the invention the respective partial steps provided for the heat treatment of the flat steel product are completed in a continuous furnace.
  • the heat treatment process is carried out as in continuous flow annealing, because in this way the individual steps of the
  • continuous furnace can individual
  • Sections in a manner known per se for example in the manner of a DFF (Direct Fired Furnace), a DFI (Direct Flame Impingement) or a NOF (Non Oxidizing Furnace) Furnace directly or, for example, in the manner of a RTF (Radiant Tube Furnace) oven indirectly heated.
  • DFF Direct Fired Furnace
  • DFI Direct Flame Impingement
  • NOF Non Oxidizing Furnace
  • Cooling measures can be carried out.
  • a holding temperature Tl is provided which lies in the temperature range of 750-860 ° C. At below 750 ° C annealing temperatures, the complete recrystallization of the structure of the flat steel product can not be achieved safely. At temperatures of more than 860 ° C, however, there is the
  • recrystallizing annealing is kept at the holding temperature Tl, is 30 - 90 seconds to optimal
  • the overaging start temperature T2 is at least 400 ° C, because at lower temperatures, the cooling power required for cooling to the overaging start temperature T2 high, but the material properties would not be further positively influenced. On the other hand, if the overaging start temperature T2 were above 600 ° C., the recrystallization would not be terminated in a sustainable manner and the danger of
  • Coarse grain formation exist. With a 400 - 600 ° C,
  • Overaging start temperature T2 can be optimized forming properties.
  • the steel flat product is subjected to an overaging treatment for a duration t2 of 30-400 seconds, at which it is cooled to a cooling rate CR2 of 0.5-12 ° C / s Overheating end temperature T3 is cooled. If the time t2 were less than 30 seconds, the time would be too short for the interstitial alloy atoms to be diffused in the recrystallized structure of the
  • a cooling rate CR2 of at least 0.5 ° C / sec is set to complete the overaging treatment within a practical time.
  • Cooling rate CR2 is set, the duration t2 of the overaging treatment would be too short. There would then be too little time for the diffusion of the interstitial
  • the final temperature T3 of the overaging treatment according to the invention is 250-350 ° C. That would be
  • step b) The partial operations of step b) are carried out under an inert gas annealing atmosphere which has a hydrogen content of 1-7 vol .-% and otherwise of nitrogen and technically unavoidable Impurities.
  • an H2 content of less than 1.0% by volume there would be a risk of oxide formation on the surface of the flat steel product, which would impair its surface quality and thus its painting properties.
  • an H2 content of the annealing atmosphere above 7.0% by volume would not bring any additional positive effect and would also be problematic from the point of view of operational safety.
  • the dew point of the annealing atmosphere is according to the invention at -10 ° C to -60 ° C. If the dew point of the annealing atmosphere were above -10 ° C., there would also be a risk of undesirable oxide formation on the surface of the flat steel product with regard to the desired surfaces. A dew point below -60 ° C would only be possible with great effort on a large-scale and would also have no additional positive effect. optimal
  • Cooling rate CR3 of 1.5 - 5.0 ° C / s provided.
  • Cooling Rate CR3 is chosen to economically avoid deterioration of the surface condition due to oxide formation, which could occur if the cooling is too slow.
  • the step c) of the method according to the invention is essential for the particularly good suitability of flat steel products according to the invention for a coating with optimized Lacquer finish.
  • This particular suitability results from a Wsa value of at most 0.40 ym, typically at most 0.35 ym, in particular less than 0.30 ym, which stands for a minimized waviness of the flat steel product surface.
  • the degree of dressing D defined above according to the invention after the heat treatment (steps b)) provided temper rolling (step c)) is 0.4 to 0.7%.
  • a D grade of less than 0.4% a deformation of the flat steel product insufficient for optimum forming properties would be achieved.
  • the values for the roughness Ra and the peak number RPc which are predetermined according to the invention could not be achieved.
  • a D grade of more than 0.7% there would be a risk that too high
  • Solidification is introduced into the steel strip, which in turn would have a negative impact on the forming properties. Furthermore, a skin pass roughness D of more than 0.7% could lead to a roughness Ra that is outside of the desired surface properties
  • predetermined range of roughness For particularly wide flat steel products, d. H.
  • the D grade D can be set to at least 0.5%. Should any negative effect of
  • a surface structure corresponding to the inventive specifications optimized with regard to the coating properties is impressed into the surface of the flat steel product by temper rolling in the surface of the flat steel product has a roughness Ra of 1.0 - 2.5 ym and a peak number RPc of at least 100 per cm. If the roughness Ra of the work roll was less than 1.0 ym or greater than 2.5 ym, then on the
  • Roughness values Ra on the flat steel product can be reliably achieved, the roughness Ra of the skin pass rolling mill can be adjusted to 1.2-2.3 ⁇ m.
  • the peak number RPc of the skin pass mill surface is at least 100 per cm, with higher peak numbers RPc, such as peak number RPc of the stripper, of at least 110 per cm, in particular more than 130 per cm, being particularly advantageous.
  • EDT Electro Discharge Texturing
  • the EDT technique is based on roughening the surface of the roll by spark erosion.
  • the skin pass mill is guided past an electrode in a tank in which a dielectric is located.
  • the cap (-) variant of the EDT technique is based on a
  • Capacitor discharge that occurs when the electrode is close enough to the roller.
  • the cap process produces a stochastic texture on the work rolls as the capacitor capacity varies widely
  • the pulse (+) variant of the EDT technique is based on a principle in which always the same amount of energy is applied to the roller to be textured. This forms a stochastic surface texture with larger
  • the work roll according to the invention can optionally undergo a post-treatment.
  • a post-treatment In this, strong prominent tips of the
  • the post-treatment can be carried out as a SuperFinish treatment.
  • This is a microfinishing process with the aim of removing peaks that are above the mean value of the surface roughness or reducing their number to a minimum.
  • Possibilities of the practical implementation of the SuperFinish process are known, for example, from DE 10 2004 013 031 A1 or EP 2 006 037 Bl.
  • the number of tips is changing the respective post-treatment negligible.
  • the roughness is unevenly distributed, whereas low or negative Rsk values are associated with a very uniform roughness distribution.
  • temper mill rollers may be hard chrome plated prior to their use in a known manner to optimize their wear resistance.
  • step c) of the cooled after the step b) and exiting the heat treatment device steel flat product is then carried out in a single skin pass. If the temper rolling is off-line, d. H. can be performed regardless of the course of the heat treatment, also several temper rolling passes can be carried out, which also shows that optimum results are achieved when the off-line temper rolling in just one pass
  • dry-drawing can have the advantage that the flat steel product does not come into contact with any wetting medium and as a result also the risk of
  • Corrosion is minimized in a subsequent storage or further processing of the flat steel product.
  • FIG. 1 shows a detail of a painted surface of an automobile body component formed from a flat steel product according to the invention
  • Fig. 2 shows a detail of a painted surface of a non-inventive
  • Fig. 3 shows the schematic course of an inventive
  • step b These are cold - rolled, flat rolled steel flat products in the form of steel strips Bl - B12 made of steel Sl - S6
  • the flat steel products were heat treated in various dimensions in a continuous RTF type heat treatment furnace, then cooled to room temperature and then roll-formed in-line.
  • the heat treatment comprises a recrystallizing
  • Holding temperature Tl of 835 ° C ⁇ 15 ° C have been heated, on which they have been held over a holding time Tl of 60 s.
  • the steel strips Bl - B12 were subjected to an overaging treatment. For this they are from the holding temperature Tl with a cooling rate CR1 of 8.5 ° C / s to a
  • the steel strips Bl - B12 were then each cooled over an overaging period t2 of 302 seconds to an over - aging end temperature T3 which was 280 ⁇ 15 ° C.
  • the cooling rate CR2 with which the steel belts Bl - B12 of the
  • the temper rolling rollers of the temper rolling stand were always roughened in cap (-) mode by means of EDT technology and subjected to hard chrome plating in a manner known per se. All temper rolling tests were carried out without the use of a skin-pass agent (dry-dressing).
  • the non-inventive steel bands Bll and B12 prove the importance of the degree of temperament for the success of
  • Embodiments of the invention achieve a Wsa value ⁇ 0.40 ym and thus provide optimum conditions for a particularly good gloss finish.
  • the measurement of the waviness characteristic value Wsa was carried out according to Stahl-Eisen-Prüfblatt (SEP) 1941, which was measured on a steel sample, which underwent 5% plastic elongation in the Marciniak deepening test.
  • FIG. 1 and Fig. 2 illustrate this with reference to a
  • FIG. 2 Flat steel product produced by forming and painting.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Metal Rolling (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

L'invention concerne un produit en plat en acier laminé à froid et recuit avec recristallisation qui présente une structure ferritique et dont l'aptitude à la déformation et l'aptitude au vernissage sont optimisées. A cet effet, il est constitué d'un acier comprenant (en % en poids) C : 0,0001-0,003 %, Si : 0,001-0,025 %, Mn : 0,05-0,20 %, P : 0,001-0,015 %, Al : 0,02-0,055 %, Ti : 0,01-0,1 %, et respectivement éventuellement Cr : 0,001-0,05 %, V : jusqu'à 0,005 %, Mo : jusqu'à 0,015 %, N : 0,001-0,004 %. Il présente les propriétés mécaniques suivantes : Rp0,2 ≤ 180 MPa, Rm ≤ 340 MPa, A80 ≤ 40 %, valeur n ≤ 0,23. Sur au moins une de ses surfaces, il présente en outre une rugosité moyenne arithmétique Ra de 0,8 - 1,6 µm et un nombre de sommets RPc de 75/cm. Pour fabriquer ledit produit plat en acier, ce dernier est recuit en continu avec recristallisation dans une atmosphère de recuit N2-H2 et soumis à un vieillissement. Ensuite, le produit plat en acier est dressé à un degré de dressage D de 0,4 - 0,7 % au moyen d'un cylindre de travail dont la surface périphérique présente une rugosité moyenne Ra de 1,0 - 2,5 µm et un nombre de sommets RPc ≥ 100/cm, les creux et sommets ménagés dans la surface du cylindre de dressage étant répartis de manière stochastique.
EP15762569.0A 2014-10-09 2015-09-09 Produit plat en acier laminé à froid et recristallisant, ainsi que son procédé de fabrication Active EP3204530B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15762569.0T PL3204530T5 (pl) 2014-10-09 2015-09-09 Walcowany na zimno i wyżarzany rekrystalizująco płaski wyrób stalowy oraz sposób jego wytwarzania

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14188314 2014-10-09
PCT/EP2015/070577 WO2016055227A1 (fr) 2014-10-09 2015-09-09 Produit plat en acier laminé à froid et recuit avec recristallisation et procédé de production dudit produit

Publications (3)

Publication Number Publication Date
EP3204530A1 true EP3204530A1 (fr) 2017-08-16
EP3204530B1 EP3204530B1 (fr) 2019-01-09
EP3204530B2 EP3204530B2 (fr) 2024-10-09

Family

ID=51743278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15762569.0A Active EP3204530B2 (fr) 2014-10-09 2015-09-09 Produit plat en acier laminé à froid et recristallisant, ainsi que son procédé de fabrication

Country Status (13)

Country Link
US (1) US10683560B2 (fr)
EP (1) EP3204530B2 (fr)
JP (1) JP6636512B2 (fr)
KR (1) KR102462210B1 (fr)
CN (1) CN106795575B (fr)
BR (1) BR112017007273B1 (fr)
CA (1) CA2961427C (fr)
ES (1) ES2716937T5 (fr)
MX (1) MX2017004593A (fr)
PL (1) PL3204530T5 (fr)
TR (1) TR201905219T4 (fr)
WO (1) WO2016055227A1 (fr)
ZA (1) ZA201701938B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016055227A1 (fr) 2014-10-09 2016-04-14 Thyssenkrupp Steel Europe Ag Produit plat en acier laminé à froid et recuit avec recristallisation et procédé de production dudit produit

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7181182B2 (ja) * 2016-09-20 2022-11-30 ティッセンクルップ スチール ヨーロッパ アクチェンゲゼルシャフト 平鋼製品の製造方法および平鋼製品
US20200056255A1 (en) * 2017-02-17 2020-02-20 Voestalpine Stahl Gmbh Method for producing steel sheets, steel sheet and use thereof
DE102017103303A1 (de) * 2017-02-17 2018-08-23 Voestalpine Stahl Gmbh Verfahren zum Herstellen von Stahlblechen
DE102017103308A1 (de) * 2017-02-17 2018-08-23 Voestalpine Stahl Gmbh Verfahren zum Herstellen von Stahlblechen
DE102017218704A1 (de) 2017-10-19 2019-04-25 Thyssenkrupp Ag Verfahren zur Herstellung eines mit einem metallischen, vor Korrosion schützenden Überzug versehenen Stahlbauteils
CN108642421A (zh) * 2018-05-15 2018-10-12 首钢集团有限公司 一种镀锌钢板的生产方法
TWI656225B (zh) * 2018-05-18 2019-04-11 中國鋼鐵股份有限公司 熱浸鍍鋅鋼片之製造方法
WO2020048602A1 (fr) * 2018-09-06 2020-03-12 Thyssenkrupp Steel Europe Ag Tôle fine à froid zinguée aux propriétés tribologiques ii améliorées
WO2020048601A1 (fr) * 2018-09-06 2020-03-12 Thyssenkrupp Steel Europe Ag Tôle fine à froid zinguée dotée de propriétés tribologiques i améliorées
CN109825763B (zh) * 2019-01-23 2021-04-30 邢台钢铁有限责任公司 一种高导电性阴极扁钢用工业纯铁及其生产方法
DE102019118578A1 (de) * 2019-07-09 2021-01-14 Thyssenkrupp Steel Europe Ag Verfahren zum Herstellen eines Blechproduktes und Blechprodukt
KR102281203B1 (ko) * 2019-12-19 2021-07-26 주식회사 포스코 프레스 성형성 및 도장 선영성이 우수한 도금강판용 조질압연 롤 및 이를 이용한 도금강판의 제조방법
KR102484992B1 (ko) * 2020-11-18 2023-01-05 주식회사 포스코 강도, 성형성 및 표면 품질이 우수한 도금강판 및 이의 제조방법
DE102021200744A1 (de) 2021-01-28 2022-07-28 Thyssenkrupp Steel Europe Ag Verfahren zum Texturieren einer Dressierwalze, Dressierwalze und dressiertes Stahlblech
DE102021125889A1 (de) * 2021-10-06 2023-04-06 Thyssenkrupp Steel Europe Ag Verfahren zum Dressieren eines Stahlblechs, dressiertes Stahlblech und daraus hergestelltes Bauteil
CN114182079B (zh) * 2021-11-18 2024-04-16 山东钢铁集团日照有限公司 一种外板用冷轧深冲钢表面轧制纹的控制方法
DE102023111354A1 (de) 2023-05-03 2024-11-07 Thyssenkrupp Steel Europe Ag Elektrolytisch verzinktes Stahlblech
CN117551857B (zh) * 2023-11-14 2025-12-12 张家港扬子江冷轧板有限公司 冷轧带钢及其生产方法

Family Cites Families (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61291924A (ja) 1985-06-17 1986-12-22 Nippon Steel Corp 加工性の優れたプレス成形用鋼板の製造方法
US4775599A (en) 1985-12-24 1988-10-04 Kawasaki Steel Corporation Cold rolled steel sheets having an improved press formability
US4798772A (en) 1986-01-17 1989-01-17 Kawasaki Steel Corporation Steel sheets for painting and a method of producing the same
JP2792898B2 (ja) 1989-04-07 1998-09-03 川崎製鉄株式会社 化成処理性にすぐれた深絞り用冷延鋼板の製造方法
US5054302A (en) † 1989-04-07 1991-10-08 Kawasaki Steel Corporation Hardness compensated thickness control method for wet skin-pass rolled sheet
ATE135414T1 (de) 1990-11-09 1996-03-15 Nippon Steel Corp Kaltgewalztes stahlband mit hervorragender pressverformbarkeit und verfahren zur herstellung
JPH04200902A (ja) 1990-11-30 1992-07-21 Kawasaki Steel Corp 塗膜鮮映性とプレス成形性に優れた金属板およびその製造方法
JP3185227B2 (ja) 1991-01-07 2001-07-09 日本鋼管株式会社 極めて優れた深絞り成形性と張出し成形性を有する冷延鋼板の製造方法
KR960013481B1 (ko) † 1993-06-29 1996-10-05 니홍고오깡 가부시키가이샤 표면처리강판 및 그 제조방법
EP0767247A4 (fr) † 1995-02-23 1999-11-24 Nippon Steel Corp Tole d'acier laminee a froid et tole galvanisee par immersion a chaud, presentant une usinabilite remarquablement uniforme, et procede de production de ces toles
JP2950199B2 (ja) † 1995-06-12 1999-09-20 株式会社神戸製鋼所 耐木目状疵性に優れた電気亜鉛めっき用鋼板および電気亜鉛めっき鋼板、並びにそれらの製造方法
DE19622164C1 (de) * 1996-06-01 1997-05-07 Thyssen Stahl Ag Verfahren zur Erzeugung eines kaltgewalzten Stahlbleches oder -bandes mit guter Umformbarkeit
DE19701443A1 (de) * 1997-01-17 1998-07-23 Thyssen Stahl Ag Stahl
ATE244318T1 (de) * 1999-12-22 2003-07-15 Sidmar Nv Ultraniedriggekohlte stahlzusammensetzung, verfahren zur herstellung dieses einbrennhärtbaren stahls, und das hergestellte produkt
JP2001288549A (ja) 2000-03-31 2001-10-19 Kawasaki Steel Corp プレス成形性に優れた冷延鋼板、めっき鋼板の製造方法
US20030015263A1 (en) * 2000-05-26 2003-01-23 Chikara Kami Cold rolled steel sheet and galvanized steel sheet having strain aging hardening property and method for producing the same
EP1291447B1 (fr) * 2000-05-31 2005-05-04 JFE Steel Corporation Tole d'acier laminee a froid presentant d'excellentes proprietes de rheodurcissement par vieillissement, et procede de production
KR100473497B1 (ko) * 2000-06-20 2005-03-09 제이에프이 스틸 가부시키가이샤 박강판 및 그 제조방법
JP2002004019A (ja) 2000-06-23 2002-01-09 Nkk Corp 亜鉛めっき鋼板
CN1269986C (zh) * 2000-10-19 2006-08-16 杰富意钢铁株式会社 镀锌钢板和它的制造方法,以及冲压成形制品的制造方法
US7267890B2 (en) * 2001-06-06 2007-09-11 Nippon Steel Corporation High-strength hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet having fatigue resistance corrosion resistance ductility and plating adhesion after servere deformation and a method of producing the same
JP4110750B2 (ja) * 2001-06-07 2008-07-02 Ｊｆｅスチール株式会社 耐食性と導電性に優れた有機被覆鋼板
JP2003080302A (ja) 2001-09-12 2003-03-18 Nkk Corp 亜鉛めっき鋼板の調質圧延方法
JP3753062B2 (ja) 2001-12-20 2006-03-08 Ｊｆｅスチール株式会社 合金化溶融亜鉛めっき鋼板及びその製造方法
JP2003306759A (ja) 2002-04-18 2003-10-31 Jfe Steel Kk プレス成形性に優れた亜鉛めっき鋼板の製造方法
JP2004076158A (ja) 2002-07-29 2004-03-11 Jfe Steel Kk 表面処理鋼板
JP4599855B2 (ja) 2004-03-04 2010-12-15 Ｊｆｅスチール株式会社 冷延鋼板の製造方法及び圧延用ロール表面の調整方法
DE102004013031A1 (de) 2004-03-16 2005-10-06 Waldrich Siegen Werkzeugmaschinen Gmbh Verfahren und Maschine zur Herstellung einer Walze
WO2007111188A1 (fr) * 2006-03-16 2007-10-04 Jfe Steel Corporation Tole d'acier laminee a froid, son procede de production et pile et son procede de production
ES2348815T3 (es) 2007-06-22 2010-12-15 Thyssenkrupp Steel Europe Ag Producto plano de un material metalico, en particular de un material de acero, uso de un producto plano semejante asi como cilindro y procedimiento para la fabricacion de tales productos planos.
EP2020451A1 (fr) † 2007-07-19 2009-02-04 ArcelorMittal France Procédé de fabrication de tôles d'acier à hautes caractéristiques de résistance et de ductilité, et tôles ainsi produites
RU2366730C1 (ru) † 2008-07-08 2009-09-10 Открытое акционерное общество "Магнитогорский металлургический комбинат" Способ производства if-стали
JP5589269B2 (ja) 2008-09-25 2014-09-17 新日鐵住金株式会社 合金化溶融亜鉛めっき鋼板及び合金化溶融亜鉛めっき鋼板の製造方法
JP5655300B2 (ja) * 2009-03-05 2015-01-21 Ｊｆｅスチール株式会社 曲げ加工性に優れた冷延鋼板、その製造方法およびそれを用いた部材
DE102010017354A1 (de) 2010-06-14 2011-12-15 Thyssenkrupp Steel Europe Ag Verfahren zum Herstellen eines warmgeformten und gehärteten, mit einer metallischen Korrosionsschutzbeschichtung überzogenen Stahlbauteils aus einem Stahlflachprodukt
JP5549414B2 (ja) 2010-06-23 2014-07-16 Ｊｆｅスチール株式会社 形状凍結性に優れた冷延薄鋼板およびその製造方法
CN102453837B (zh) * 2010-10-25 2013-07-17 宝山钢铁股份有限公司 一种高磁感无取向硅钢的制造方法
CN101956133B (zh) * 2010-10-29 2012-09-05 攀钢集团钢铁钒钛股份有限公司 一种低屈服强度耐时效连退冷轧钢板及其生产方法
WO2012070271A1 (fr) * 2010-11-22 2012-05-31 新日本製鐵株式会社 Feuille d'acier de type à durcissement par vieillissement sous contrainte ayant une excellente résistance au vieillissement après cuisson de peinture et son procédé de fabrication
JP5958038B2 (ja) * 2011-04-21 2016-07-27 Ｊｆｅスチール株式会社 外圧に対する缶胴部の座屈強度が高く、成形性および成形後の表面性状に優れた缶用鋼板およびその製造方法
DE102012017703A1 (de) 2012-09-07 2014-03-13 Daetwyler Graphics Ag Flachprodukt aus Metallwerkstoff, insbesondere einem Stahlwerkstoff, Verwendung eines solchen Flachprodukts sowie Walze und Verfahren zur Herstellung solcher Flachprodukte
DE102014010020A1 (de) 2014-07-08 2016-01-14 Clariant International Ltd. Adsorptionsmaterial zur Adsorption von Edelgasen, Verwendung desselben und Verfahren zur Adsorption von Edelgasen
KR102462210B1 (ko) 2014-10-09 2022-11-03 티센크루프 스틸 유럽 악티엔게젤샤프트 냉간 압연되고 재결정 어닐링된 평강 제품 및 평강 제품의 제조 방법
CN104946978B (zh) 2015-07-07 2017-03-01 新余钢铁集团有限公司 一种用于家电面板的彩涂冷轧基板及其制造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016055227A1 (fr) 2014-10-09 2016-04-14 Thyssenkrupp Steel Europe Ag Produit plat en acier laminé à froid et recuit avec recristallisation et procédé de production dudit produit

Also Published As

Publication number Publication date
PL3204530T3 (pl) 2019-07-31
ES2716937T5 (en) 2025-02-12
BR112017007273A2 (pt) 2018-01-23
CA2961427A1 (fr) 2016-04-14
CN106795575A (zh) 2017-05-31
TR201905219T4 (tr) 2019-05-21
ES2716937T3 (es) 2019-06-18
PL3204530T5 (pl) 2024-12-02
BR112017007273B1 (pt) 2021-03-09
WO2016055227A1 (fr) 2016-04-14
US20170306430A1 (en) 2017-10-26
KR20170067839A (ko) 2017-06-16
JP6636512B2 (ja) 2020-01-29
CA2961427C (fr) 2019-01-08
ZA201701938B (en) 2022-05-25
MX2017004593A (es) 2017-07-10
JP2017534758A (ja) 2017-11-24
CN106795575B (zh) 2018-08-28
EP3204530B2 (fr) 2024-10-09
EP3204530B1 (fr) 2019-01-09
US10683560B2 (en) 2020-06-16
KR102462210B1 (ko) 2022-11-03

Similar Documents

Publication Publication Date Title
EP3204530B1 (fr) Produit plat en acier laminé à froid et recristallisant, ainsi que son procédé de fabrication
EP2848709B1 (fr) Procédé de fabrication d'un composant en acier revêtu d'une coiffe métallique protégeant de la corrosion et composant en acier
DE60119826T2 (de) Verfahren zum Herstellen eines Bauteils mit sehr guten mechanischen Eigenschaften, Umformung durch Tiefziehen, aus gewalztem insbesondere warmgewalztem und beschichtetem Stahlblech
EP3655560B1 (fr) Produit plat en acier possédant une bonne résistance au vieillissement et son procédé de fabrication
EP2553133B1 (fr) Acier, produit plat en acier, élément en acier et procédé de fabrication d'un élément en acier
EP2924141B1 (fr) Produit plat en acier laminé à froid et son procédé de fabrication
EP2812458B1 (fr) Procédé pour le revêtement par immersion à chaud d'un produit plat en acier
EP3692178B1 (fr) Procede de fabrication d'une bande d'acier a partir d'un acier multiphase a tres haute resistance
EP3221484B1 (fr) Procédé de production d'une bande en acier polyphasé, durcissant à l'air, ayant une haute résistance et ayant d'excellentes propriétés de mise en oeuvre
EP3250727B2 (fr) Procédé de fabrication d'une pièce constituée de tôle d'acier revêtue à base d'aluminium durcie par moulage par compression
EP3221483A1 (fr) Acier polyphasé, trempé à l'air et à haute résistance, ayant d'excellentes propriétés de mise en oeuvre et procédé de production d'une bande avec cet acier
EP3215656A1 (fr) Procédé de production d'un revêtement anti-corrosion pour tôles d'acier trempables et revêtement anti-corrosion pour tôles d'acier trempables
WO2018234102A1 (fr) Procédé de fabrication d'un composant en acier pourvu d'un revêtement métallique anticorrosion
EP3658307B9 (fr) Pièce en tôle fabriquée par formage à chaud d'un produit plat en acier et procédé pour sa fabrication
DE102015202642A1 (de) Verfahren zum Herstellen eines Erzeugnisses aus gewalztem Bandmaterial
WO2018149966A1 (fr) Procédé de fabrication de tôles d'acier, tôle d'acier et son utilisation
WO2022029033A1 (fr) Procédé de production d'une bande d'acier revêtue, et procédé de production d'un produit d'acier trempé à partir de celle-ci
EP3583239B1 (fr) Procédé de fabrication de tôles d'acier, tôle d'acier et son utilisation
EP4093896A1 (fr) Composant en acier comprenant une couche anti-corrosion contenant du manganèse
DE102020203421A1 (de) Stahlflachprodukt mit einem ZnCu-Schichtsystem
EP4516954A1 (fr) Produit plat en acier avec une couche de protection contre la calamine

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20170314

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

TPAC Observations filed by third parties

Free format text: ORIGINAL CODE: EPIDOSNTIPA

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20180125

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20180914

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1087367

Country of ref document: AT

Kind code of ref document: T

Effective date: 20190115

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 502015007629

Country of ref document: DE

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2716937

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20190618

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190509

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190409

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

REG Reference to a national code

Ref country code: SK

Ref legal event code: T3

Ref document number: E 30805

Country of ref document: SK

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190509

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190409

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190410

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

REG Reference to a national code

Ref country code: DE

Ref legal event code: R026

Ref document number: 502015007629

Country of ref document: DE

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

26 Opposition filed

Opponent name: ARCELORMITTAL

Effective date: 20191007

Opponent name: SALZGITTER FLACHSTAHL GMBH

Effective date: 20191008

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190930

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190909

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20190909

RDAF Communication despatched that patent is revoked

Free format text: ORIGINAL CODE: EPIDOSNREV1

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

APBM Appeal reference recorded

Free format text: ORIGINAL CODE: EPIDOSNREFNO

APBP Date of receipt of notice of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA2O

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20150909

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

APBQ Date of receipt of statement of grounds of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA3O

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230526

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: TR

Payment date: 20230907

Year of fee payment: 9

Ref country code: NL

Payment date: 20230920

Year of fee payment: 9

Ref country code: GB

Payment date: 20230920

Year of fee payment: 9

Ref country code: CZ

Payment date: 20230905

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SK

Payment date: 20230904

Year of fee payment: 9

Ref country code: SE

Payment date: 20230920

Year of fee payment: 9

APBU Appeal procedure closed

Free format text: ORIGINAL CODE: EPIDOSNNOA9O

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 20241009

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: DE

Ref legal event code: R102

Ref document number: 502015007629

Country of ref document: DE

REG Reference to a national code

Ref country code: ES

Ref legal event code: DC2A

Ref document number: 2716937

Country of ref document: ES

Kind code of ref document: T5

Effective date: 20250212

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

REG Reference to a national code

Ref country code: SK

Ref legal event code: MM4A

Ref document number: E 30805

Country of ref document: SK

Effective date: 20240909

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20190109

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20240909

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20240909

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20240909

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20250919

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20240910

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PL

Payment date: 20250901

Year of fee payment: 11

Ref country code: IT

Payment date: 20250923

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20250918

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20250922

Year of fee payment: 11

Ref country code: AT

Payment date: 20250919

Year of fee payment: 11

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20251028

Year of fee payment: 11

REG Reference to a national code

Ref country code: DE

Ref legal event code: R081

Ref document number: 502015007629

Country of ref document: DE

Owner name: THYSSENKRUPP STEEL EUROPE AG, DE

Free format text: FORMER OWNERS: THYSSENKRUPP AG, 45143 ESSEN, DE; THYSSENKRUPP STEEL EUROPE AG, 47166 DUISBURG, DE