WO2015149918A1 - Composant, en particulier composant structural conçu pour un véhicule à moteur et procédé de production d'un tel composant - Google Patents

Composant, en particulier composant structural conçu pour un véhicule à moteur et procédé de production d'un tel composant Download PDF

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Publication number
WO2015149918A1
WO2015149918A1 PCT/EP2015/000644 EP2015000644W WO2015149918A1 WO 2015149918 A1 WO2015149918 A1 WO 2015149918A1 EP 2015000644 W EP2015000644 W EP 2015000644W WO 2015149918 A1 WO2015149918 A1 WO 2015149918A1
Authority
WO
WIPO (PCT)
Prior art keywords
zinc
coating
component
cobalt
manganese
Prior art date
Application number
PCT/EP2015/000644
Other languages
German (de)
English (en)
Inventor
Damien Close
Peter Feuser
Regis Lallement
Robert Mayrhofer
Felix Raschke
Nicolas Stein
Albert Tidu
Original Assignee
Daimler 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
Priority claimed from DE102014004652.4A external-priority patent/DE102014004652A1/de
Priority claimed from DE102014018650.4A external-priority patent/DE102014018650A1/de
Application filed by Daimler Ag filed Critical Daimler Ag
Publication of WO2015149918A1 publication Critical patent/WO2015149918A1/fr

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 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • B32B15/013—Layered products comprising a layer of metal all layers being exclusively metallic one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C18/00—Alloys based on zinc
    • 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
    • C23C20/00—Chemical coating by decomposition of either solid compounds or suspensions of the coating forming compounds, without leaving reaction products of surface material in the coating
    • C23C20/02—Coating with metallic material
    • C23C20/04—Coating with metallic material with metals
    • 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
    • C23C24/00—Coating starting from inorganic powder
    • C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
    • C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
    • C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
    • C23C24/106—Coating with metal alloys or metal elements only
    • 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
    • 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
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/06—Metallic material
    • C23C4/08—Metallic material containing only metal elements
    • 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

  • Component in particular structural component for a motor vehicle, and method for
  • the invention relates to a component, in particular a structural component for a motor vehicle, and a method for producing such a component specified in the preambles of the independent claims.
  • the component has a base body formed from a heat-transformable steel, which at least in a partial area with a
  • Coating is provided.
  • the coating has at least zinc.
  • a coating having at least one layer is also referred to as
  • the base body is provided with the coating at least in a partial area and hot-formed together with the coating.
  • the main body is, for example, a thermoformable sheet metal, wherein the base body is formed, for example, of boron steel.
  • the base body is formed, for example, of boron steel.
  • the base body is high along with the coating
  • Two coating systems for hot-forming steel sheets are known from the general state of the art: a first of these coating systems is a hot-dip galvanizing, the second one being hot-dip galvanizing
  • Coating system is a fire aluminizing. This means that the steel of the body is either hot-dip galvanized or fire-aluminized. Hot-dip galvanized or hot-dip aluminized steels are used in series production of press-hardened steels
  • Structural components in particular for motor vehicles, for use as by this in
  • Hot-dip galvanized steels offer good corrosion resistance due to the reduced electrochemical stress compared to the steel substrate
  • Fire-aluminized steels have a good forming property in the single-stage
  • the component can not be protected from corrosion by the principle of the sacrificial anode.
  • the coating is formed from a zinc-cobalt-manganese alloy.
  • the coating is of a zinc-cobalt (ZnCo) alloy or
  • Zinc-manganese (ZnMn) alloy formed.
  • the prerequisite is that the coating already precedes the hot-forming or press-hardening
  • Liquid metal embrittlement can be greatly reduced. Furthermore, a
  • Zinc evaporation can be reduced compared to the design of the coating of pure zinc.
  • the proportion of cobalt is preferably at least 0.1% by weight and at most 40% by weight, particularly preferably approximately 15% by weight.
  • the proportion of manganese is more than 15% by weight and not more than 40% by weight. At slightly above 5% by weight, a melting temperature of 640 ° C. and, at 40% by weight, a melting temperature of 900 ° C. can be achieved. At this point, it should be emphasized once again that the addition of manganese should not achieve the reduction of the oxidation of zinc material, but rather allows a significant increase in the melting temperature, whereby the
  • Liquid metal embrittlement is reduced or prevented.
  • the zinc-manganese or zinc-cobalt coating is a zinc alloyed overlay that provides cathodic corrosion protection because ZnMn and ZnCo form stable corrosion products with a low dissolution rate after the formation of ZnCo and ZnMn intermetallic phases.
  • the invention is based on the idea or the knowledge that in hot-formed components, in particular in press-hardened components, in particular two oxidation phenomena can occur.
  • a first of these oxidation phenomena is effected, for example, on the vehicle by loading the component through an aqueous environment with salts.
  • the second oxidation phenomenon may occur in the Component manufacturing itself come.
  • the second oxidation phenomenon is caused, for example, by an oxidizing environment during the heating phase of the press-hardening.
  • Corrosion protection layers are used as sacrificial anode.
  • a sacrificial anode has a lower electrochemical potential compared to exterior alloys.
  • a cover layer may be used. This cover layer has a barrier to oxidation of the underlying layers and suppresses the evaporation.
  • the liquid metal embrittlement and the diffusion of iron into the coating are avoided by the use of an alloyed or ceramic layer with an increased melting point.
  • it is preferably provided that the coating is applied directly to the steel substrate, that touches the steel substrate.
  • anti-corrosion coating systems for steel sheets have been chosen to be as inexpensive as possible. For cold-formed sheets, this may be justified. In hot forming, however, the cost, especially the material cost, plays a minor role, since the process of hot working is in itself so costly that additional costs for producing the coating are negligible. Therefore, when choosing coatings for
  • Hot-formed sheets the main goal to achieve the best possible corrosion protection, even if the associated coating system is costly in terms of application and / or material costs. This goal can be realized in the component according to the invention.
  • a particularly high corrosion protection effect can be achieved because ZnMn and ZnCo form stable corrosion products with a low dissolution rate after the formation of ZnCo and ZnMn intermetallic phases.
  • (Zn-Mn-Co) increases at a weight fraction of, for example, one percent of the cobalt, the melting temperature of the coating of about 420 ° C with pure zinc to about 567 ° C.
  • the cathodic corrosion protection can be greatly increased by the alloy of zinc with manganese, since manganese is a lower having electrochemical potential as pure zinc.
  • the melting temperature increases from 420 ° C with pure zinc to around 740 ° C.
  • a zinc evaporation can be reduced in this case compared to the design of the coating of pure zinc.
  • the proportion by weight of cobalt in the zinc-cobalt-manganese alloy is up to 15 percent. In a further advantageous embodiment of the invention, it is provided that the proportion by weight of manganese in the zinc-cobalt-manganese alloy of the coating is up to 70 percent. By using up to 15% by weight of cobalt and up to 70% by weight of manganese, particularly good material properties are achieved in the component.
  • a zinc-containing coating is first applied at least in a partial region of a base body formed from a hot-forming steel and then hot-formed, in particular press-hardened, together with the coating.
  • the inventive method is characterized in that the coating is formed of a zinc-cobalt-manganese alloy or zinc-manganese alloy or zinc-cobalt alloy.
  • the drawing shows in the single figure is a schematic sectional view of a Component comprising a base body formed of a heat-transformable steel, which is provided at least in a partial area with a coating which is formed of an alloy of zinc-cobalt or zinc-manganese or zinc-manganese-cobalt.
  • a component 10 which may, for example, be a structural component for a motor vehicle, is shown in a schematic illustration in the single FIGURE.
  • the component 10 comprises a base body 12 formed from a heat-transformable steel.
  • the base body 12 is provided with a coating 14 in a partial area.
  • the coating 14 is formed of a zinc-cobalt-manganese alloy, but may equally well consist of a zinc-cobalt or zinc-manganese alloy.
  • the coating 14 becomes a coating system
  • the component 10 can be used in particular in the bodywork, wherein the component 10 is preferably press-hardened for it, i. the press hardening of the component 10 takes place after its coating, which was previously applied in the course of a coil coating.
  • the press hardening of the component 10 takes place after its coating, which was previously applied in the course of a coil coating.
  • conventional zinc coatings or coatings formed from zinc there is the problem that, in particular in single-stage press-hardening due to mechanical and thermal stresses in the case of
  • Zinc-manganese alloy (ZnMn) formed coating 14 are the same
  • Corrosion protection properties of the component 10 during press hardening significantly improved.
  • the cathodic corrosion protection of the component 10 is greatly increased during press hardening, since manganese has a lower electrochemical potential than pure zinc.
  • the melting temperature of the manganese alloyed coating 14 is increased over a pure use of zinc. For pure zinc, the melting temperature is about 420 ° C whereas at a
  • Coating 14 increased to about 740 ° C.
  • the alloy of zinc with cobalt also leads to an increase in the melting temperature of the coating 14, which in particular can greatly reduce liquid metal embrittlement. At one percent by weight of the cobalt, the melting temperature increases from 420 ° C to about 567 ° C compared to pure zinc.
  • the described composition of the coating 14 thus improves the corrosion protection properties of the component 10.
  • the coating 14 is applied directly to the base body 12, so that the coating 14 touches the base body 12.
  • the coating 14 has exactly one layer.
  • the coating 14 has a higher melting point than pure zinc. Furthermore, compared to pure zinc, the liquid metal embrittlement and the zinc evaporation, in particular during hot forming, can at least be reduced.
  • the base body 12 is preferably formed of a hardenable steel or a deep-drawing steel, which is for example a boron steel or
  • Manganese-boron steel and microalloyed steels can act.
  • the coating 14 of the types of alloy according to the invention can, for example, by a PVD method (PVD Physical Vapor Disposition - physical
  • the coating 14 is first applied in a partial region of the main body 12. Subsequently, the base body 2 is hot-formed together with the coating 14. In this case, the main body together with the
  • Coating 14 is heated above an austenitizing temperature of the base body 12 and then formed in a cooled tool and rapidly cooled. Due to the explained composition of the coating 14, in particular the cathodic Corrosion protection of the component 10 after hot forming guaranteed.

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

Abstract

L'invention concerne un composant (10), en particulier un composant structural conçu pour un véhicule à moteur, comprenant un corps de base (12) constitué d'un acier thermofaçonnable qui, avant le traitement thermique précédent le thermofaçonnage, est pourvu au moins dans une zone partielle d'un revêtement (14) comportant du zinc, ledit revêtement (14) étant constitué d'un alliage zinc-cobalt-manganèse, de zinc-cobalt ou de zinc-manganèse. L'invention concerne en outre un procédé pour produire un composant (10), en particulier un composant structural pour un véhicule à moteur.
PCT/EP2015/000644 2014-03-29 2015-03-26 Composant, en particulier composant structural conçu pour un véhicule à moteur et procédé de production d'un tel composant WO2015149918A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102014004652.4 2014-03-29
DE102014004652.4A DE102014004652A1 (de) 2014-03-29 2014-03-29 Bauteil, insbesondere Strukturbauteil für einen Kraftwagen, sowie Verfahren zum Herstellen eines solchen Bauteils
DE102014018650.4 2014-12-13
DE102014018650.4A DE102014018650A1 (de) 2014-12-13 2014-12-13 Bauteil, insbesondere Strukturbauteil für einen Kraftwagen, sowie Verfahren zum Herstellen eines solchen Bauteils

Publications (1)

Publication Number Publication Date
WO2015149918A1 true WO2015149918A1 (fr) 2015-10-08

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PCT/EP2015/000644 WO2015149918A1 (fr) 2014-03-29 2015-03-26 Composant, en particulier composant structural conçu pour un véhicule à moteur et procédé de production d'un tel composant

Country Status (1)

Country Link
WO (1) WO2015149918A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017011557A1 (de) 2017-12-14 2019-06-19 Daimler Ag Beschichtung für ein Karosserieteil mit einer Legierung aus Zink und Mangan, Karosserieteil mit einer solchen Beschichtung und Verfahren zum Herstellen eines beschichteten Karosserieteils mit einer solchen Beschichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004018971A (ja) * 2002-06-18 2004-01-22 Nippon Steel Corp バーリング加工性に優れた高強度高延性溶融亜鉛めっき鋼板とその製造方法
EP1630244A1 (fr) * 2003-04-23 2006-03-01 Sumitomo Metal Industries, Ltd. Produit thermoforme a la presse et procede de production de ce dernier
WO2013056848A1 (fr) 2011-10-19 2013-04-25 Tata Steel Uk Limited Revêtements anti-incrustation et anticorrosion pour des substrats en acier
WO2015027972A1 (fr) * 2013-09-02 2015-03-05 Salzgitter Flachstahl Gmbh Revêtement anti-corrosion à base de zinc pour tôles d'acier destinées à la fabrication de pièces à haute température par emboutissage à chaud

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004018971A (ja) * 2002-06-18 2004-01-22 Nippon Steel Corp バーリング加工性に優れた高強度高延性溶融亜鉛めっき鋼板とその製造方法
EP1630244A1 (fr) * 2003-04-23 2006-03-01 Sumitomo Metal Industries, Ltd. Produit thermoforme a la presse et procede de production de ce dernier
WO2013056848A1 (fr) 2011-10-19 2013-04-25 Tata Steel Uk Limited Revêtements anti-incrustation et anticorrosion pour des substrats en acier
WO2015027972A1 (fr) * 2013-09-02 2015-03-05 Salzgitter Flachstahl Gmbh Revêtement anti-corrosion à base de zinc pour tôles d'acier destinées à la fabrication de pièces à haute température par emboutissage à chaud

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BOZZINI B ET AL: "Electrodeposition and Plastic Behavior of Low-Manganese Zinc-Manganese Alloy Coatings for Automotive Applications", METAL FINISHING, ELSEVIER, NEW YORK, NY, US, vol. 97, no. 5, May 1999 (1999-05-01), pages 33 - 42, XP004216744, ISSN: 0026-0576 *
DATABASE WPI Week 200419, Derwent World Patents Index; AN 2004-195512 *
FAN D W ET AL: "State-of-the-knowledge on coating systems for hot stamped parts", STEEL RESEARCH INTERNATIONAL, VERLAG STAHLEISEN GMBH., DUSSELDORF, DE, vol. 83, no. 5, May 2012 (2012-05-01), pages 412 - 433, XP009176185, ISSN: 1611-3683, [retrieved on 20120316] *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017011557A1 (de) 2017-12-14 2019-06-19 Daimler Ag Beschichtung für ein Karosserieteil mit einer Legierung aus Zink und Mangan, Karosserieteil mit einer solchen Beschichtung und Verfahren zum Herstellen eines beschichteten Karosserieteils mit einer solchen Beschichtung

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