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
  • C21D8/0278—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 involving a particular surface treatment 
• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
  • C25D7/00—Electroplating characterised by the article coated
• • 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
  • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
  • C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
  • C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
• • 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
  • C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
• • 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
  • C25D3/56—Electroplating: Baths therefor from solutions of alloys
  • C25D3/562—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of iron or nickel or cobalt
• • C—CHEMISTRY; METALLURGY
  • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
  • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
  • C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
  • C25D5/48—After-treatment of electroplated surfaces
• • 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
  • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
  • C21D1/62—Quenching devices
  • C21D1/673—Quenching devices for die quenching

Definitions

• the invention relates to a method for producing a composite component for a motor vehicle body, comprising at least one of a high-strength steel sheet material formed and provided with a metallic anti-corrosion coating Biechformteil.
• the invention further relates to a component composite produced by this method for a motor vehicle body.
• the electrolytically applied metallic corrosion protection coating is generally brittle and constitutes a weak point in the case of bonding of the sheet metal part (via the electrolytically applied metallic corrosion protection coating) to another component.
• the invention has for its object to remedy this situation.
• a provided starting sheet material which may be a flat sheet material or an already formed sheet material, to a sheet metal part;
• bonding Adding the provided with the metallic anti-corrosion coating sheet metal part with at least one other component by gluing (hereinafter referred to as bonding), wherein the bonding over the electrolytically applied metallic corrosion protection coating;
• the above-mentioned method steps are carried out or carried out chronologically in the specified sequence, it being possible for pauses and / or transport paths to be provided between the individual steps.
• the method according to the invention can include intermediate steps (eg cutting operations, parts transport, quality controls, etc.) that are not specified or sub-steps that are not explained in greater detail.
• the heat treatment of the adhesive-bonded parts composite serves to increase the adhesion or adhesion of the electrolytically applied metallic corrosion protection coating on the base material of the sheet metal part concerned and thereby permanently improve the durability of the bond.
• a heat treatment is also described in DE 10 2009 053 368 A1. Different to However, in the method according to the invention this serves to counteract hydrogen embrittlement of the base material.
• the other component may be any body part. It is preferably provided that the other component is likewise a sheet-metal shaped part, wherein this shaped sheet metal part can likewise be formed from a higher-strength sheet metal material. Furthermore, the other component can also be provided with a metallic corrosion protection coating and in particular with an electrolytically applied metallic corrosion protection coating.
• a higher-strength steel sheet material is understood to be a sheet material made of a steel material whose tensile strength is at least 800 MPa, preferably at least 900 MPa, particularly preferably at least 1000 MPa and in particular at least 1100 MPa.
• the term "high-strength steel sheet material” thus also includes high-strength and ultra-high-strength steel sheet materials.
• the starting sheet material already has higher-strength properties. Rather, these can also be formed in the course of the process according to the invention.
• the forming of the starting sheet material includes or includes press-hardening or hardening.
• press-hardening the sheet material previously heated to over 900 ° C is formed in a chilled tool and simultaneously cooled at high speed during molding to obtain an increase in strength.
• press hardening z. A 16MnB5 or a 22MnB5 material.
• the sheet metal material is preferably a thin sheet with a sheet thickness of up to 3.0 mm, preferably of up to 2.0 mm, particularly preferably of up to 1.5 mm and in particular of up to 1.0 mm.
• An electrolytic or galvanic coating is understood to mean the electrochemical deposition of metallic deposits or coatings on the base material of the sheet metal part in question.
• the applied metallic coating or corrosion protection coating can be single-layer or even be multilayered.
• the metallic coating is applied at least partially to the sheet metal part. It is preferably provided that the coating is applied over the entire surface and in particular also on both sheet metal sides of the sheet metal part.
• the metallic corrosion protection coating deposited in the electrolytic coating process may be a zinc-nickel layer (ZnNi layer). It is preferably provided that the layer thickness of the electrolytically applied corrosion protection coating is less than or equal to 15 ⁇ m. In a zinc-containing corrosion protection coating it is provided that the layer thickness is greater than or equal to 5 ⁇ and less than or equal to 15 ⁇ m and in particular amounts to approximately 7.5 ⁇ .
• the heat treatment of the part composite produced by bonding can be carried out at a temperature of about 180 ° C and in particular at not more than 220 ° C.
• the heat treatment time can be about 20 to 40 minutes and especially about 30 minutes. Due to the heat treatment, the component is essentially completed.
• the heat treatment takes place in the course of a painting process, wherein it is provided in particular that the parts composite produced by bonding has previously been incorporated into a larger part assembly (such as a motor vehicle body). Is it z. B. to a parts network or component composite for the Karosserierohbau so the heat treatment can be done relatively late or after completion of the body shell. In this way, one can make use of the heat treatment often required in the painting process, so that a separate heat treatment of the component composite produced by bonding can be omitted, which is particularly advantageous from an economic and ecological point of view.
• the heat treatment in the course of a painting process can also be used to cure the adhesive used. It is preferably provided that during the painting process the bonding site is painted over.
• a motor vehicle body is, for example, subjected to cathodic dip painting (KTL)
• the baking process which is required in this case can be carried out, the motor vehicle body following the dip painting being a heating oven or the same is used for the heat treatment of the composite part produced by bonding, especially since the parts composite and the sheet metal part incorporated therein with the electrolytically applied metallic corrosion protection coating must pass through this baking process in any case.
• the solution of the problem also extends to a component assembly for a motor vehicle body, which was produced in particular by a method according to the invention, said component composite a first sheet metal part, which is formed of a high-strength steel sheet material and provided with an electrolytically applied metallic corrosion protection coating, and at least one second sheet metal part and wherein the two sheet metal parts are joined together by gluing.
• the first sheet-metal shaped part is a reinforcing part and in particular an inner reinforcing part for the foot region of a B-pillar, as explained in more detail below in connection with the figures.
• Fig. 1 shows a perspective view of two components that are joined by gluing to a composite component.
• FIG. 2 shows schematically in a flowchart essential steps of the method according to the invention for producing the component composite from FIG. 1.
• Fig. 1 shows the foot area of a B-pillar for a motor vehicle body.
• the foot area of the B-pillar is designated overall by 10.
• the B-pillar 10 goes over into the lower soschweiler 11.
• Both the B-pillar 10 and the side skirts 11 are sheet metal parts. It may be provided a one-piece design of the B-pillar 10 and the side sill 11 or a weld.
• FIG. 1 further shows an inner reinforcement part 20, which is inserted from the inside or as shown from below into the transition region between B pillar 10 and side rail 11, wherein a component bond is brought about by bonding.
• the reinforcing member 20 could also be adhered from the outside.
• the inner reinforcing member 20 is a sheet metal molding of a high-strength steel sheet material. In particular, it is a press-hardened sheet metal part.
• the inner reinforcement part 20 is provided with an electrolytically applied metallic corrosion protection coating, which is in particular a ZiNi coating. Also, the B-pillar 10 and the side skirts 11 may be provided with such a corrosion protection coating.
• step I a supplied starting sheet material is formed into the inner reinforcing member 20, which forming may include press-hardening. Subsequently, in step II, the inner reinforcement part 20 is cleaned. In step III, a metallic anticorrosion coating is applied to the inner reinforcement member 20 in an electrolytic deposition process. Subsequently, in step IV, the inner reinforcement part 20 provided with the electrolytically applied metallic corrosion protection coating is joined by gluing to the B-pillar 10 and the sill 11, as illustrated in FIG. 1 by the arrow.
• step V which follows directly or at a later time, the component bond produced by bonding between the sheet metal parts 20 and 10 or 11 is heat treated in order to increase the adhesive strength of the metallic corrosion protection coating on the base material of the inner reinforcement part 20 and thereby the resistance of the bond between the To improve components 10 and 11 and 20.
• the heat treatment takes place in particular in the course of a painting process or following a painting process, as explained above.
• the method explained in connection with FIG. 2 may comprise further intermediate steps and substeps. LIST OF REFERENCE NUMBERS

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Organic Chemistry (AREA)
• Materials Engineering (AREA)
• Metallurgy (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Electrochemistry (AREA)
• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Crystallography & Structural Chemistry (AREA)
• Laminated Bodies (AREA)
• Electroplating Methods And Accessories (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Citations (4)

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• 2012
  • 2012-05-22 DE DE102012208494A patent/DE102012208494A1/de not_active Withdrawn
• 2013
  • 2013-05-08 EP EP13721743.6A patent/EP2852693B1/fr not_active Not-in-force
  • 2013-05-08 WO PCT/EP2013/059601 patent/WO2013174655A1/fr not_active Ceased

Patent Citations (5)

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