WO2019242818A1 - Composant de véhicule automobile composé d'un acier de traitement - Google Patents

Composant de véhicule automobile composé d'un acier de traitement Download PDF

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Publication number
WO2019242818A1
WO2019242818A1 PCT/DE2019/100569 DE2019100569W WO2019242818A1 WO 2019242818 A1 WO2019242818 A1 WO 2019242818A1 DE 2019100569 W DE2019100569 W DE 2019100569W WO 2019242818 A1 WO2019242818 A1 WO 2019242818A1
Authority
WO
WIPO (PCT)
Prior art keywords
maximum
motor vehicle
zinc
coating
steel
Prior art date
Application number
PCT/DE2019/100569
Other languages
German (de)
English (en)
Inventor
Martin Pohl
Original Assignee
Benteler Automobiltechnik Gmbh
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
Application filed by Benteler Automobiltechnik Gmbh filed Critical Benteler Automobiltechnik Gmbh
Publication of WO2019242818A1 publication Critical patent/WO2019242818A1/fr

Links

Classifications

    • 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
    • C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
    • 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
    • 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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
    • 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
    • C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of manganese
    • 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
    • C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
    • C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
    • 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
    • C21D2211/002—Bainite
    • 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
    • C21D2211/008—Martensite
    • 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
    • C22C38/06—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
    • C22C38/18—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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

Definitions

  • the invention relates to a motor vehicle component made from a tempered steel with a coating of zinc.
  • Profile components made of sheet steel are coated with the aim of improving their properties. As a result, in particular the corrosion resistance but also the wear resistance can be increased.
  • press-hardened components in particular body components, from a semi-finished product made of unhardened, hot-formable steel sheet are known.
  • the press-hardened component blank is coated with a layer protecting against corrosion in a coating step using a thermal diffusion process. Water-hardening and tempering steels are advantageously used there.
  • the corrosion protection layer consists of a zinc / iron alloy produced in a solid diffusion process, the layer thickness being less than or equal to 10 pm.
  • DE 10 2005 002 706 A1 counts a prior art method for applying a solid metallic coating, in particular made of zinc or a zinc alloy, to a steel sheet profile component.
  • the profile component is fogged in a treatment room with a metal powder.
  • the metal powder is deposited electrostatically over the entire surface of the profile component.
  • a diffusion process takes place between the steel sheet and the metal powder, the coating being formed.
  • the profile components are coated in a continuous process.
  • EP 2 271 784 B1 discloses a method for coating a surface of a metallic profile component with zinc, which is used as a shard process is carried out.
  • the profile components to be coated are heat-treated together with zinc as a coating agent at a temperature between 200 ° C and 500 ° C in a reaction chamber.
  • the reaction space is, in particular, slowly rotating closed containers, for example a drum or a rotary kiln.
  • the oxygen content of the atmosphere contained in the reaction space is set to less than or equal to 5% by volume.
  • a flux is supplied to the reaction chamber before the heat treatment.
  • the invention is based on the object of creating a high-strength, corrosion-resistant motor vehicle component with improved load behavior.
  • the motor vehicle component according to the invention is made from a tempered steel.
  • This quenched and tempered steel consists of a steel alloy which, in addition to iron (Fe) as the main constituent and unavoidable impurities, contains the following alloy elements each as a mass fraction of the melt analysis in percent (mass%):
  • the coating is a zinc diffusion coating consisting of a zinc-iron coating.
  • a particularly advantageous steel alloy is composed as follows in percent by mass (mass%):
  • V Vanadium (V) maximum 0.05
  • Titanium (Ti) maximum 0.01
  • the motor vehicle components are hot-formed and press-hardened profile components.
  • a steel sheet made from the tempering steel according to the invention is heated to a temperature above AC3 and then quickly, i. H. usually in less than 5 s, reshaped and clamped in the press tool, subjected to rapid cooling so that a martensitic and / or bainitic structure is achieved.
  • These measures result in a product with high dimensional accuracy, good dimensional stability and high strength values, which is very suitable for structural, body and safety components in the vehicle.
  • the motor vehicle components can also be hardened only in certain areas, that is to say they have locally different structures and / or material properties.
  • the steel alloy has a coordinated chemical composition, which is particularly advantageous for hot forming and press hardening.
  • a ferritic-pearlitic structure In the initial state there is a ferritic-pearlitic structure.
  • the structure can be transformed into a purely martensitic Structure to be transformed. This increases the tensile strengths to 1,800 MPa to 2,200 MPa.
  • the component properties are essentially set by cooling in the tool. By controlling the cooling, motor vehicle components with graduated strength properties can be manufactured.
  • Partial press hardening offers the possibility of providing the motor vehicle components with partially different properties with regard to strength and elongation.
  • partial press hardening which is also called tailored tempering, different or different component properties are set via targeted temperature control in the thermoforming process. The desired mechanical properties are generated through the choice of different structural changes.
  • Tailored blanks in particular tailored rolled blanks (TRB), which consist of tempering steel used according to the invention, can then be used as the starting board for the production of the motor vehicle components according to the invention.
  • TRB tailored rolled blanks
  • the motor vehicle components according to the invention are particularly advantageously hot-formed and press-hardened.
  • the component can be press-hardened completely or only in some areas.
  • the forming can take place directly or indirectly.
  • Direct single-stage hot stamping is the most common process within hot stamping.
  • the component In direct hot forming, the component is austenitized at a steel-dependent temperature, transferred to the cooled die or the pressing tool and then formed. Forming and component hardening take place in one step. In this way, complex geometries can be formed because the material has excellent formability at high temperatures.
  • the component With indirect hot forming, the component is first cold or unheated preformed or deep drawn. Then the component is on the Austenitizing temperature heated and fully formed. This additional step extends the shape limits for very complex geometries.
  • a metal powder based on zinc or a zinc alloy is used as the coating material.
  • This can be pure zinc powder, but it can also be a metal powder formulated with additives.
  • the individual zinc grains are usually covered with an oxide skin.
  • the coating is formed by a diffusion process between the motor vehicle components and the metal powder.
  • the heat treatment is carried out with precise temperature control.
  • the temperature of the heat treatment is between 300 ° C and 420 ° C, in particular between 360 ° C and 420 ° C.
  • the heat treatment is carried out over a period of 5 minutes to 120 minutes, in particular in a period of 5 minutes to 50 minutes.
  • the heat treatment advantageously extends over a period of 5 minutes to 30 minutes, preferably over a period of 10 minutes to 30 minutes.
  • a zinc-iron alloy layer forms on the motor vehicle components to be coated by diffusion. This corresponds to a shard coating.
  • the quenched and tempered steel used according to the invention has a tensile strength Rm of 1,800 MPa to 2,200 MPa and a yield strength Rp0.2 of 1,100 MPa to 1,500 MPa after hot forming and press hardening.
  • the motor vehicle components according to the invention After the heat treatment during the coating process and the formation of the zinc-fusion coating consisting of a zinc-iron coating, the motor vehicle components according to the invention have a tensile strength Rm reduced by 20% to 40%. At the yield point Rp0.2, the coating process leads to changes from -15% to to + 5%.
  • a motor vehicle component according to the invention which is in particular a structural and / or safety component, has high dimensional accuracy, good material characteristics and high strength and toughness with very good corrosion protection.
  • the method according to the invention in which the coating takes place in a continuous process, is particularly suitable for the manufacture of crash-relevant motor vehicle structural components in which very good corrosion protection and very high strength in combination with relatively high ductility are required.
  • crash-relevant motor vehicle structural components in which very good corrosion protection and very high strength in combination with relatively high ductility are required.
  • These are all components of the vehicle body that are in the floor area, i.e. are exposed to a high level of corrosion and / or that should provide a high section modulus in the event of a crash without failure.
  • Typical motor vehicle components according to the invention are bumper cross beams, A, B, C or D pillars, body reinforcements or side skirts and side impact beams.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

L'invention concerne un composant de véhicule automobile composé d'un acier de traitement présentant un revêtement en zinc. Un acier de traitement hautement résistant à base d'un alliage de bore-manganèse-acier est utilisé dans le cas présent. Le revêtement est un revêtement de diffusion de zinc constitué d'un habillage en zinc et en fer.
PCT/DE2019/100569 2018-06-20 2019-06-19 Composant de véhicule automobile composé d'un acier de traitement WO2019242818A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018114838.0A DE102018114838A1 (de) 2018-06-20 2018-06-20 Kraftfahrzeugbauteil aus Vergütungsstahl
DE102018114838.0 2018-06-20

Publications (1)

Publication Number Publication Date
WO2019242818A1 true WO2019242818A1 (fr) 2019-12-26

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2019/100569 WO2019242818A1 (fr) 2018-06-20 2019-06-19 Composant de véhicule automobile composé d'un acier de traitement

Country Status (2)

Country Link
DE (1) DE102018114838A1 (fr)
WO (1) WO2019242818A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116507752A (zh) * 2020-11-19 2023-07-28 奥钢联钢铁有限责任公司 钢材料及其制造方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10348086A1 (de) 2003-10-13 2005-05-19 Benteler Automobiltechnik Gmbh Hochfestes Stahlbauteil mit Korrosionschutzschicht aus Zink
EP1646458A1 (fr) 2003-07-22 2006-04-19 DaimlerChrysler AG Élément trempé à la presse et procédé de fabrication associé
DE102005002706A1 (de) 2005-01-19 2006-07-20 Benteler Automobiltechnik Gmbh Beschichtungsverfahren
EP2271784A1 (fr) 2008-04-24 2011-01-12 Bodycote Wärmebehandlung Gmbh Procédé de shérardisation
JP2014015638A (ja) * 2012-07-06 2014-01-30 Nippon Steel & Sumitomo Metal 熱間プレス鋼板部材およびその製造方法ならびに熱間プレス用鋼板

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1646458A1 (fr) 2003-07-22 2006-04-19 DaimlerChrysler AG Élément trempé à la presse et procédé de fabrication associé
DE10348086A1 (de) 2003-10-13 2005-05-19 Benteler Automobiltechnik Gmbh Hochfestes Stahlbauteil mit Korrosionschutzschicht aus Zink
DE102005002706A1 (de) 2005-01-19 2006-07-20 Benteler Automobiltechnik Gmbh Beschichtungsverfahren
EP1683892A1 (fr) * 2005-01-19 2006-07-26 Benteler Automobiltechnik GmbH Procédé de revetement
EP2271784A1 (fr) 2008-04-24 2011-01-12 Bodycote Wärmebehandlung Gmbh Procédé de shérardisation
JP2014015638A (ja) * 2012-07-06 2014-01-30 Nippon Steel & Sumitomo Metal 熱間プレス鋼板部材およびその製造方法ならびに熱間プレス用鋼板

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116507752A (zh) * 2020-11-19 2023-07-28 奥钢联钢铁有限责任公司 钢材料及其制造方法

Also Published As

Publication number Publication date
DE102018114838A1 (de) 2019-12-24

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