EP2327805A1 - Procédé et installation de fabrication destinés à fabriquer une pièce usinée en tôle dotée d'un revêtement de protection contre la corrosion - Google Patents

Procédé et installation de fabrication destinés à fabriquer une pièce usinée en tôle dotée d'un revêtement de protection contre la corrosion Download PDF

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Publication number
EP2327805A1
EP2327805A1 EP10180536A EP10180536A EP2327805A1 EP 2327805 A1 EP2327805 A1 EP 2327805A1 EP 10180536 A EP10180536 A EP 10180536A EP 10180536 A EP10180536 A EP 10180536A EP 2327805 A1 EP2327805 A1 EP 2327805A1
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EP
European Patent Office
Prior art keywords
sheet metal
metal part
coating
forming
heat treatment
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
EP10180536A
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German (de)
English (en)
Other versions
EP2327805B1 (fr
Inventor
Franz Dr.Gaßner
Bernd Dr.Kupetz
Andreas Kapfer
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.)
Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication date
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Publication of EP2327805A1 publication Critical patent/EP2327805A1/fr
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    • 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
    • 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
    • C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or vacuum
    • 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 by deformation combined with, or followed by, heat treatment
    • C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
    • C21D8/0278—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips involving a particular surface 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
    • 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
    • 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
    • C25D5/50—After-treatment of electroplated surfaces by heat-treatment

Definitions

  • the invention relates to a method for producing a sheet metal molding provided with a corrosion protection coating and formed from a high-strength sheet steel material.
  • the invention further relates to a manufacturing plant for carrying out this method.
  • sheet metal parts are increasingly used from a high-strength sheet steel material to meet lightweight criteria and / or increasing safety requirements.
  • the provision of such sheet metal parts with a stress-resistant corrosion protection coating has been the subject of numerous developments for quite some time. Representative is in this regard z. B. on the DE 10 2005 055 374 A1 and in particular the introductory part thereof.
  • An object of the invention is to provide alternative ways of providing such sheet metal parts, in particular to avoid the disadvantages associated with the prior art.
  • a sheet metal part produced by means of the method according to the invention is formed from a high-strength steel sheet material.
  • 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. However, it is not absolutely necessary that the starting sheet material already has higher-strength properties.
  • these can also be formed or acquired in the course of the method according to the invention, for example by a hardening process and in particular press hardening process, as explained in more detail below.
  • it is a thin sheet with a sheet thickness of ⁇ 3.0 mm, preferably of ⁇ 2.0 mm, more preferably of ⁇ 1.5 mm and in particular of ⁇ 1.0 mm.
  • the produced sheet metal part is in particular a component for a motor vehicle.
  • the forming is preferably carried out in a deep-drawing process or a process comparable thereto.
  • the sheet metal part may also be a further processed semi-finished, such. B. a profile part or the like.
  • An electrolytic or galvanic coating is understood to be the electrochemical deposition of metallic precipitates or coatings on the sheet metal part in question.
  • the applied coating or corrosion protection coating can be single-layered or multi-layered.
  • the coating is at least partially applied to the sheet metal part. It is preferably provided that the coating is applied over the entire surface and in particular on both sides of the sheet metal and the peripheral edges (cut edges, visible edges) of the sheet metal part.
  • the heat treatment or the heat treatment takes place subsequently and in particular immediately after the electrolytic coating.
  • the heat treatment serves primarily to drive off the hydrogen contained in the starting sheet material, but in particular the hydrogen introduced during the electrolytic coating.
  • Hydrogen is generally considered a steel pest because it causes embrittlement of the steel sheet material, the so-called hydrogen embrittlement.
  • the heat treatment causes the hydrogen atoms embedded in the structure of the steel sheet material to be expelled by effusion. Thus, the hydrogen embrittlement of the steel sheet material can be counteracted.
  • safety-relevant sheet-metal molded parts made from a high-strength sheet steel material have not been electrolytically galvanized.
  • the heat treatment also serves to reward the steel sheet material in an advantageous manner, so that an improvement in microstructure occurs and this achieves high strength combined with high toughness properties.
  • z. B. improve on a safety-related component whose crash properties.
  • the inventive method may include further, not explained in detail here steps and intermediate steps, such as. As the cleaning and / or trimming the sheet metal parts before and / or after forming.
  • a significant advantage of the invention is the fact that the forming can be done with a bare steel sheet material, whereby the forming process can be easily designed. Since the application of the anticorrosive coating follows the forming, any damage resulting from the deformation of the anticorrosive coating also remains. Furthermore, during coating, any cutting edges on the sheet metal material can also be covered. U. a. because of a uniformly applied and the visible edges with enclosing corrosion protection coating, the sheet metal part produced is also visually pleasing and thus can be used in the field of vision.
  • the starting sheet material is a high-strength steel sheet material.
  • the starting sheet material already has higher-strength properties and these are not, at least not to a considerable extent, formed in the course of the inventive method.
  • Higher strength sheet steel materials are z.
  • multi-phase steels in particular CP steels, dual-phase steels and TRIP steels, and martensite steels.
  • a zinc-containing and in particular a corrosion protection coating formed essentially of zinc is applied to the sheet-metal shaped part.
  • the layer thickness of the electrolytically applied corrosion protection coating is less than or equal to 15 ⁇ m.
  • the layer thickness is greater than or equal to 5 ⁇ m and less than or equal to 15 ⁇ m and in particular amounts to approximately 7.5 ⁇ m. This also serves, in particular, to maintain the weldability of the steel sheet material, despite the applied corrosion protection coating, in which a significant advantage over hot dip galvanizing can be seen, in which the layer thicknesses formed can be up to 300 ⁇ m.
  • An advantage of the electrolytic coating is also to be seen in the fact that the layer thickness of the anticorrosive coating is adjustable and very homogeneously applicable.
  • the temperature during the heat treatment is more than 100 ° C, preferably more than 150 ° C and in particular between 180 ° C and 200 ° C.
  • the temperature should not exceed 220 ° C to prevent damage to this coating.
  • the duration of the heat treatment can be up to several hours.
  • the duration is z. B. up to 1 h, preferably up to 2 h, more preferably up to 5 h, in particular up to 10 h and particularly preferably up to 50 h.
  • the heat treatment takes place in a protective gas atmosphere or in a vacuum in order to avoid damage and, in particular, oxidation of the electrolytically applied coating or anticorrosion protective coating.
  • a protective gas atmosphere may, for. As nitrogen and / or argon, which may also be a protective gas mixture.
  • the forming is a hot forming.
  • the steel sheet material is heated to a temperature of about 900 ° C before forming.
  • the starting sheet material is a hot forming suitable steel sheet material.
  • the sheet metal part is hardened.
  • the starting sheet material is a hardenable steel sheet material.
  • the strength of the steel sheet material is increased, so that this has high-strength properties at least after curing.
  • Hardening preferably takes place in combination with the above-described hot forming (hot working hardening).
  • the forming includes a press hardening.
  • the starting sheet material is a press-hardenable steel sheet material, such as. A 16MnB5, a 19MnB5 or a 22MnB5.
  • press-hardening two approaches are currently possible: according to the first procedure, a heated blank of the starting material is placed in the forming tool, formed therein, and simultaneously or subsequently press-cooled under pressure.
  • an intermediate sheet metal part is first produced by forming (preforming) from the board, which is then heated and placed in the press hardening tool, where the press hardening takes place with only a slight change in shape.
  • a significant advantage of the method according to the invention using press hardening is the fact that a bare starting sheet material is usable and that the subsequently electrolytically applied and in particular zinc-containing corrosion protection coating has a high to very high degree of purity, with advantages for the corrosion protection and for Lackierrich.
  • Such a sheet metal part is also visually pleasing and thus, in particular on a motor vehicle, can also be used in the field of vision.
  • the production plant according to the invention serves to carry out the method according to the invention.
  • This production plant comprises at least one electrolytic coating installation, such as, for example, an electrolytic immersion bath, and at least one heat treatment furnace.
  • a heat treatment furnace is z.
  • B. a conventional heat treatment furnace (chamber furnace) or even a continuous furnace.
  • Such a continuous furnace preferably comprises an entrance and an exit lock area and an intermediate transfer section.
  • different temperature zones can be kept ready for the heat treatment in such a continuous furnace.
  • a heat transfer furnace allows a high number of pieces.
  • the solution of the problem also extends to a hot-formed, preferably also subsequently hardened, and in particular press-hardened sheet-metal shaped part with an electrolytically applied, zinc-containing and in particular substantially zinc-formed corrosion protection coating.
  • This sheet metal part is in particular a structural and / or a safety component for a motor vehicle, such a structural and / or safety component, for example, a door impact beam, an A or B pillar, a longitudinal or transverse beam, a Bumper reinforcement or the like.
  • a structural and / or safety component for example, a door impact beam, an A or B pillar, a longitudinal or transverse beam, a Bumper reinforcement or the like.
  • electrolytic galvanizing offers numerous advantages, as explained above.
  • the sheet metal part according to the invention is produced in particular by the method according to the invention and / or with the production plant according to the invention.
  • Fig. 1 shows a press-hardened sheet metal part P with an electrolytically applied corrosion protection coating C, wherein the anticorrosive coating C Zinhaltig and in particular is formed substantially of zinc.
  • the sheet metal part P is an example of a reinforcing part for a side skirts of a motor vehicle. The following will be related to the Fig. 2 an inventive method for producing such a sheet metal part P explained.
  • step I begins in step I with the provision of a starting sheet material which is a sheet steel material suitable for press hardening.
  • the starting sheet material may, for. B. be provided as a coil or in the form of individual boards.
  • step II a board blank is produced from the planar starting sheet material, wherein the cutting geometry is ideally chosen so that subsequently no further cutting operations are required.
  • step III the board blank is heated, which ideally takes place in a continuous furnace.
  • This heating can optionally be carried out in step IIIa, a preforming of the board blank to an intermediate sheet metal part, this intermediate sheet metal part can have approximately the final geometry of the produced sheet metal part P.
  • press hardening is performed in a press hardening tool in step IV to obtain a press-hardened shaped sheet metal part.
  • the press-hardened sheet-metal shaped part is cleaned in step V to remove contaminants such as, in particular, fire residues and
  • the press-hardened and metallically bright sheet metal part is coated in step VI in an electrolyte solution and in particular in an immersion bath over the entire surface with the zinc-containing corrosion protection coating C. It can be provided that the press-hardened sheet metal part passes through several electrolytic baths (immersion baths).
  • the press-hardened and now provided with the zinc-containing corrosion protection coating C sheet metal part is heat-treated in step VII.
  • the heat treatment serves primarily to drive off the hydrogen introduced into the steel sheet material during the electrolytic coating (step VI) in order to counteract hydrogen embrittlement, as explained in detail above.
  • the heat treatment can also be carried out a remuneration of the steel sheet material.
  • the sheet metal part P is substantially verbaufertig. Due to the full-surface applied corrosion protection coating C, hydrogen can no longer be stored in the steel sheet material at a later time.
  • the method explained by way of example may comprise further steps and intermediate steps not explained here, such as, for example, trimming operations after forming, intermediate cleaning measures, oiling measures, etc.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Heat Treatment Of Articles (AREA)
EP10180536.4A 2009-11-14 2010-09-28 Procédé destinés à fabriquer une pièce usinée en tôle dotée d'un revêtement de protection contre la corrosion Active EP2327805B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910053368 DE102009053368A1 (de) 2009-11-14 2009-11-14 Verfahren und Fertigungsanlage zum Herstellen eines Blechformteils mit einer Korrosionsschutzbeschichtung

Publications (2)

Publication Number Publication Date
EP2327805A1 true EP2327805A1 (fr) 2011-06-01
EP2327805B1 EP2327805B1 (fr) 2016-04-13

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EP (1) EP2327805B1 (fr)
DE (1) DE102009053368A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013010025A1 (de) 2013-06-17 2014-12-18 Muhr Und Bender Kg Verfahren zum Herstellen eines Erzeugnisses aus flexibel gewalztem Bandmaterial
DE102013010024A1 (de) 2013-06-17 2014-12-18 Muhr Und Bender Kg Strukturbauteil für ein Kraftfahrzeug und Verfahren zur Herstellung eines solchen Strukturbauteils
JP2015224393A (ja) * 2014-05-26 2015-12-14 ムール ウント ベンダー コマンディートゲゼルシャフトＭｕｈｒ ｕｎｄ Ｂｅｎｄｅｒ ＫＧ 焼入れされた成形部品を製造する方法及び設備

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010030465B4 (de) 2010-06-24 2023-12-07 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Herstellen eines Blechformteils aus einem höherfesten Stahlblechmaterial mit einer elektrolytisch aufgebrachten Zink-Nickel-Beschichtung
DE102012208494A1 (de) 2012-05-22 2013-11-28 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Herstellen eines Bauteilverbunds
DE102012210693A1 (de) * 2012-06-25 2014-04-24 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Herstellen eines bereichsweise unterschiedlich gehärteten Blechformteils
DE102012215512A1 (de) 2012-08-31 2014-05-28 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Fertigungsanlage zum Herstellen eines warmumgeformten oder pressgehärteten Blechformteils mit einer metallischen Korrosionsschutzbeschichtung sowie hiermit hergestelltes Blechformteil und Fahrzeugkarosserie mit solchem Blechformteil
DE102015209660B4 (de) 2015-05-27 2018-01-04 Volkswagen Aktiengesellschaft Verfahren zur Herstellung eines Blechumformteils

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WO1984001461A1 (fr) * 1982-09-30 1984-04-12 Boeing Co Structure plaquee presentant une fragilite par l'hydrogene reduite
EP0360781A2 (fr) * 1988-09-14 1990-03-28 Maschinenfabrik Andritz Actiengesellschaft Procédé pour le zingage sur une ou deux faces de l'acier inoxydable
EP0419678A1 (fr) * 1989-04-07 1991-04-03 Nkk Corporation Tole d'acier a deux couches, extremement resistante a la corrosion, avec une excellente aptitude au revetement, et ne presentant aucun cloquage lors du revetement electrolytique, ainsi que procede pour sa fabrication
DE10021948A1 (de) * 2000-05-05 2001-11-22 Thyssenkrupp Stahl Ag Verfahren und Anlage zum Verzinken eines Stahlbandes
DE102005055374A1 (de) 2005-11-17 2007-05-24 Victocor Technologies S.A. Hochfestes Stahlbauteil mit Korrosionsschutzschicht aus Zink
US7514153B1 (en) * 2005-03-03 2009-04-07 The United States Of America As Represented By The Secretary Of The Navy Method for deposition of steel protective coating
EP2088223A1 (fr) * 2008-01-16 2009-08-12 ThyssenKrupp Steel AG Tôle en acier phosphatée et procédé de fabrication d'une telle tôle

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CA2175105C (fr) * 1995-05-23 1999-09-21 C. Ramadeva Shastry Procede visant a ameliorer les proprietes de formabilite et de soudabilite de feuilles d'acier galvanise
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Publication number Priority date Publication date Assignee Title
WO1984001461A1 (fr) * 1982-09-30 1984-04-12 Boeing Co Structure plaquee presentant une fragilite par l'hydrogene reduite
EP0360781A2 (fr) * 1988-09-14 1990-03-28 Maschinenfabrik Andritz Actiengesellschaft Procédé pour le zingage sur une ou deux faces de l'acier inoxydable
EP0419678A1 (fr) * 1989-04-07 1991-04-03 Nkk Corporation Tole d'acier a deux couches, extremement resistante a la corrosion, avec une excellente aptitude au revetement, et ne presentant aucun cloquage lors du revetement electrolytique, ainsi que procede pour sa fabrication
DE10021948A1 (de) * 2000-05-05 2001-11-22 Thyssenkrupp Stahl Ag Verfahren und Anlage zum Verzinken eines Stahlbandes
US7514153B1 (en) * 2005-03-03 2009-04-07 The United States Of America As Represented By The Secretary Of The Navy Method for deposition of steel protective coating
DE102005055374A1 (de) 2005-11-17 2007-05-24 Victocor Technologies S.A. Hochfestes Stahlbauteil mit Korrosionsschutzschicht aus Zink
EP2088223A1 (fr) * 2008-01-16 2009-08-12 ThyssenKrupp Steel AG Tôle en acier phosphatée et procédé de fabrication d'une telle tôle

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013010025A1 (de) 2013-06-17 2014-12-18 Muhr Und Bender Kg Verfahren zum Herstellen eines Erzeugnisses aus flexibel gewalztem Bandmaterial
DE102013010024A1 (de) 2013-06-17 2014-12-18 Muhr Und Bender Kg Strukturbauteil für ein Kraftfahrzeug und Verfahren zur Herstellung eines solchen Strukturbauteils
WO2014202587A1 (fr) * 2013-06-17 2014-12-24 Muhr Und Bender Kg Procédé de production d'un produit d'un matériau en bande laminé
CN105283586A (zh) * 2013-06-17 2016-01-27 穆尔和本德公司 用于从挠性轧制带材生产产品的方法
DE102013010024B4 (de) 2013-06-17 2018-03-22 Muhr Und Bender Kg Strukturbauteil für ein Kraftfahrzeug und Verfahren zur Herstellung eines solchen Strukturbauteils
JP2015224393A (ja) * 2014-05-26 2015-12-14 ムール ウント ベンダー コマンディートゲゼルシャフトＭｕｈｒ ｕｎｄ Ｂｅｎｄｅｒ ＫＧ 焼入れされた成形部品を製造する方法及び設備
CN105316734A (zh) * 2014-05-26 2016-02-10 穆尔和本德公司 用于制造硬化成型部件的方法和设备
EP2949787A3 (fr) * 2014-05-26 2016-03-16 Muhr und Bender KG Procédé et installation de fabrication d'une pièce de formage durcie
US9938600B2 (en) 2014-05-26 2018-04-10 Muhr Und Bender Kg Manufacturing a hardened formed part
CN105316734B (zh) * 2014-05-26 2018-11-30 穆尔和本德公司 用于制造硬化成型部件的方法和设备

Also Published As

Publication number Publication date
EP2327805B1 (fr) 2016-04-13
DE102009053368A1 (de) 2011-05-19

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