EP3332048B1 - Procédé de production d'un revêtement par immersion à chaud, galvanisé à base de zinc - magnésium et un produit plat en acier doté d'un tel revêtement - Google Patents

Procédé de production d'un revêtement par immersion à chaud, galvanisé à base de zinc - magnésium et un produit plat en acier doté d'un tel revêtement Download PDF

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Publication number
EP3332048B1
EP3332048B1 EP15750686.6A EP15750686A EP3332048B1 EP 3332048 B1 EP3332048 B1 EP 3332048B1 EP 15750686 A EP15750686 A EP 15750686A EP 3332048 B1 EP3332048 B1 EP 3332048B1
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EP
European Patent Office
Prior art keywords
coating
steel
galvannealing
die
zinc
Prior art date
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Application number
EP15750686.6A
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German (de)
English (en)
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EP3332048A1 (fr
Inventor
Georg Parma
Jennifer Schulz
Horst Berndsen
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
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ThyssenKrupp Steel Europe AG
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
    • C23C2/06—Zinc or cadmium or alloys based thereon
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/26—After-treatment
    • C23C2/28—Thermal after-treatment, e.g. treatment in oil bath
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
    • C23C2/36—Elongated material
    • C23C2/40—Plates; Strips
    • 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
    • C22C38/02—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
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
    • C23C2/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
    • C23C2/022—Pretreatment of the material to be coated, e.g. for coating on selected surface areas by heating

Definitions

  • the invention relates to a method for producing a zinc-magnesium galvannealed hot-dip coating on a steel substrate, the steel substrate typically being a flat steel product.
  • Rolled steel products such as strips, sheets, blanks and blanks obtained from them are referred to as "flat steel products”.
  • the invention further relates to a flat steel product which is coated with a zinc-magnesium galvannealed hot-dip coating.
  • a process and a correspondingly procured flat steel product are from the WO 2009/059950 A2 known.
  • the flat steel product is annealed at an annealing temperature of 500-900 ° C., then cooled to a bath inlet temperature in the range of 360-710 ° C. and then by a Zn-Mg- heated to a melt bath temperature of 350-650 ° C.
  • Melt bath passed which contains zinc and inevitable impurities (in wt .-%) 4 - 8% Mg and 0.5 - 1.8% Al and optionally one or more of the may have the following elements with a content below the upper limit specified for each of these elements: Si: ⁇ 2%, Pb: ⁇ 0.1%, Ti: ⁇ 0.2%, Ni: ⁇ 1%, Cu: ⁇ 1 %, Co: ⁇ 0.3%, Mn: ⁇ 0.5%, Cr: ⁇ 0.2%, Sr: ⁇ 0.5%, Fe: ⁇ 3%, B: ⁇ 0.1%, Bi: ⁇ 0.1%, Cd: ⁇ 0.1%.
  • the layer thickness of the metallic coating is adjusted by removing excess Zn-Mg melt.
  • the flat steel product obtained in this way has a Zn-Mg-Al coating which, in addition to zinc and unavoidable impurities (in% by weight), Mg: 4-8% and Al 0.5-1.8% and optionally one or more of the contains the following elements with a content below the upper limit specified for each of these elements: Si: ⁇ 2%, Pb: ⁇ 0.1%, Ti: ⁇ 0.2%, Ni: ⁇ 1%, Cu: ⁇ 1% , Co: ⁇ 0.3%, Mn: ⁇ 0.5%, Cr: ⁇ 0.2%, Sr: ⁇ 0.5%, Fe: ⁇ 3%, B: ⁇ 0.1%, Bi: ⁇ 0.1%, Cd: ⁇ 0.1%, REM ⁇ 0.2%, Sn ⁇ 0.5%.
  • the flat steel product coated in this way is excellently protected against corrosion and has good weldability.
  • JP H03 97840 discloses a process for producing a zinc-magnesium galvannealed hot dip coating on an aluminum-calmed steel substrate, the coating comprising 0.4-0.8 wt% Mn.
  • JP 2001 279412 A discloses a method of producing a ZnMg galvannealed hot dip coating on a high-Si steel substrate.
  • JP H06 256925 A discloses a Zn-Al-Mg coated steel substrate with an ultra-low C-Ti-Nb content.
  • JP 2000 119832 A discloses a Zn-Al-Mg coated steel substrate with ultra low C but high Si content.
  • US 2008/142125 A1 discloses an IF steel coated with Zn-Mg-Fe, but which is not galvannealed.
  • the invention has achieved this object by performing the work steps specified in claim 1 in such a method.
  • a flat steel product according to the invention which achieves the above object is specified in claim 10.
  • the invention provides a process for the production of steel products, in particular flat steel products, which are provided with a hot-dip coating based on zinc and which have improved corrosion protection properties.
  • a hot-dip coating based on zinc and which have improved corrosion protection properties.
  • magnesium is introduced into the coating.
  • the maximum permissible magnesium content is limited in order to ensure the alloying behavior of the Galvannealed hot-dip coating.
  • the composition of the molten bath is selected according to the invention in such a way that a galvannealing coating with optimal usage and corrosion protection behavior is obtained in the subsequent galvannealing treatment.
  • the aim of the procedure according to the invention is to produce a hot-dip coating with a galvannealed coating typical Fe content of 5-15% by weight, in particular 7-15% by weight.
  • the steel substrate processed according to the invention can be any steel component, such as a steel profile or the like.
  • the invention is particularly well suited for the processing of flat steel products as a steel substrate, since flat steel products of this type can be processed in a manner according to the invention on plants established in practice with a high degree of economy. Systems are particularly suitable for this purpose, which are completed in a continuous manner by the respective flat steel product in a generally known manner.
  • the application of the invention is limited to steel products which consist of an IF steel and which can be coated with a Zn-Mg-Al galvannealed coating of the type to be produced according to the invention.
  • a selection of exemplary alloy specifications for these steels is summarized in Table 6, among others.
  • coatings obtained in the manner according to the invention can be produced in the manner according to the invention as defined above, which are free of zeta phases and therefore show less abrasion during shaping.
  • the samples have first undergone a heat treatment after degreasing in a continuous pass, in which they have been recrystallized annealed in order to then pass through a melt bath at a certain inlet temperature TE.
  • a melt bath at a certain inlet temperature TE.
  • Different melt baths are used in different experiments used, the composition of which is given in Table 2.
  • the melt bath temperature was 460 ° C. in each case.
  • the thickness of the hot-dip coating now present on the respective sample is also known per se ( WO 2009/059950 A2 ) was set to 7 ⁇ m each.
  • the samples then underwent a galvannealing treatment in which they were held at a galvannealing temperature TG for a galvannealing time tG.
  • Samples 5 and 6 are not inventive examples because the galvannealing temperature is below 540 ° C. As a result, the coatings on these samples are not devoid of zeta phase (s).

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Thermal Sciences (AREA)
  • Coating With Molten Metal (AREA)

Claims (8)

  1. Procédé de production d'un revêtement par immersion à chaud, galvanisé à base de zinc-magnésium, sur un substrat en acier, comportant les étapes de travail suivantes :
    a) Mise à disposition d'un substrat en acier étant composé d'un acier IF,
    b) Revêtement par immersion à chaud du substrat en acier dans un bain fondu saturé en Fe, chauffé à une température d'immersion de 350 - 650 °C, constitué de (en % massique) 0,10 - 0,16 % de Al, 0,1 - 0,6 % de Mg et 0,01 - 0,5 % de Fe, ainsi que de, chacun optionnellement, < 2 % de Si, < 0,1 % de Pb, < 0,2 % de Ti, < 1 % de Ni, < 0,3 % de Co, < 0,0001 % de Mn, < 0,2 % de Cr, < 0,5 % de Sr, < 0,1 % de Bi, < 0,1 % de Cd, < 0,5 % de Sn, et le reste étant constitué de zinc et d'impuretés inévitables,
    c) Réalisation d'un traitement de galvanisation, lors duquel le substrat en acier revêtu par immersion à chaud est maintenu pendant un temps de galvanisation de 10 à 25 s à une température de galvanisation de 540 à 800 °C pour produire sur le substrat en acier un revêtement par immersion à chaud galvanisé à base de zinc - magnésium, qui comprend, en plus du zinc et des impuretés inévitables, (en % massique) 0,10 - 0,5 % de Al, 5,0 - 15,0 % de Fe, 0,10 - 0,8 % de Mg ainsi qu'optionnellement un ou plusieurs des éléments suivants conformément aux critères suivants en termes de teneurs Si : < 2 %, Pb : < 0,1 %, Ti < 0,2 %, Ni : < 1 %, Co : < 0,3 %, Mn : < 0,0001 %, Cr : < 0,2 %, Sr : < 0,5 %, Bi : < 0,1 %, Cd : < 0,1 %, Sn : < 0,01 %.
  2. Procédé selon la revendication 1, caractérisé en ce que la teneur en Al du bain fondu est au plus de 0,15 % massique.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce que la teneur en Mg du bain fondu est au plus de 0,4 % massique.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que la température d'immersion du bain fondu est de 430 - 490 °C.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que la température de galvanisation est de 540 - 720 °C.
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que le temps de galvanisation est de 12 - 24 s.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que le substrat en acier est un produit plat en acier.
  8. Produit plat en acier présentant un revêtement par immersion à chaud galvanisé à base de zinc-magnésium, qui se compose de (en % massique)
    Al : 0, 10 - 0,5 %,
    Fe : 5,0 - 15,0 %
    Mg: 0,10 - 0,8 %
    optionnellement d'un ou plusieurs des éléments suivants conformément aux critères suivants en termes de teneurs
    Si : < 2 %,
    Pb : < 0,1 %,
    Ti : < 0,2 %,
    Ni : < 1 %,
    Co : < 0,3 %,
    Mn : < 0,0001 %,
    Cr : < 0,2 %,
    Sr : < 0,5 %,
    Bi : < 0,1 %,
    Cd : < 0,1 %,
    Sn : < 0,01 %,
    et le reste étant du zinc et des impuretés inévitables, le revêtement étant exempt de phase Zeta et le produit plat en acier étant composé d'un acier IF.
EP15750686.6A 2015-08-06 2015-08-06 Procédé de production d'un revêtement par immersion à chaud, galvanisé à base de zinc - magnésium et un produit plat en acier doté d'un tel revêtement Active EP3332048B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2015/068177 WO2017020965A1 (fr) 2015-08-06 2015-08-06 Procédé de production d'un revêtement par immersion à chaud, galvanisé à base de zinc - magnésium et un produit plat en acier doté d'un tel revêtement

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EP3332048A1 EP3332048A1 (fr) 2018-06-13
EP3332048B1 true EP3332048B1 (fr) 2020-02-19

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Country Status (5)

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US (1) US20190003027A1 (fr)
EP (1) EP3332048B1 (fr)
JP (1) JP6668453B2 (fr)
CN (1) CN107849674A (fr)
WO (1) WO2017020965A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6696274B2 (ja) * 2016-04-11 2020-05-20 日本製鉄株式会社 合金化溶融亜鉛めっき鋼板の製造方法
DE102018132171A1 (de) * 2018-12-13 2020-06-18 Thyssenkrupp Steel Europe Ag Batteriegehäuse und Verwendung
WO2020259842A1 (fr) * 2019-06-27 2020-12-30 Thyssenkrupp Steel Europe Ag Procédé de fabrication d'un produit plat d'acier revêtu, procédé de fabrication d'un élément en acier et produit plat d'acier revêtu
CN117587348A (zh) * 2023-10-18 2024-02-23 河北张宣高科科技有限公司 一种添加合金元素的热镀锌液及其制备方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080142125A1 (en) * 2005-02-22 2008-06-19 Thyssenkrupp Steel Ag Kaiser-Wilhelm-Str. L00 Coated Steel Sheet or Strip

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Publication number Priority date Publication date Assignee Title
JPH0397840A (ja) * 1989-09-11 1991-04-23 Sumitomo Metal Ind Ltd 合金化溶融亜鉛めっき鋼板
JPH06256925A (ja) * 1993-03-08 1994-09-13 Nippon Steel Corp プレス成形性に優れた亜鉛−鉄合金化溶融亜鉛めっき鋼板
JP2000119832A (ja) * 1998-10-16 2000-04-25 Nippon Steel Corp めっき密着性に優れた溶融亜鉛めっき鋼板
JP2001279412A (ja) * 2000-03-29 2001-10-10 Nippon Steel Corp 耐食性の良好なＳｉ含有高強度合金化溶融亜鉛めっき鋼板とその製造方法
JP4582707B2 (ja) * 2005-04-20 2010-11-17 新日本製鐵株式会社 不メッキ欠陥発生のない溶融亜鉛メッキ方法
ES2636442T3 (es) * 2006-05-15 2017-10-05 Thyssenkrupp Steel Europe Ag Producto de acero plano provisto con un revestimiento anticorrosivo y procedimiento para su fabricación

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080142125A1 (en) * 2005-02-22 2008-06-19 Thyssenkrupp Steel Ag Kaiser-Wilhelm-Str. L00 Coated Steel Sheet or Strip

Also Published As

Publication number Publication date
WO2017020965A1 (fr) 2017-02-09
JP6668453B2 (ja) 2020-03-18
US20190003027A1 (en) 2019-01-03
CN107849674A (zh) 2018-03-27
JP2018529024A (ja) 2018-10-04
EP3332048A1 (fr) 2018-06-13

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