EP2241641B1 - Procédé de fabrication de composants durcis par une presse - Google Patents

Procédé de fabrication de composants durcis par une presse Download PDF

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Publication number
EP2241641B1
EP2241641B1 EP20100002910 EP10002910A EP2241641B1 EP 2241641 B1 EP2241641 B1 EP 2241641B1 EP 20100002910 EP20100002910 EP 20100002910 EP 10002910 A EP10002910 A EP 10002910A EP 2241641 B1 EP2241641 B1 EP 2241641B1
Authority
EP
European Patent Office
Prior art keywords
component
press
temperature
hot
hardened
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.)
Not-in-force
Application number
EP20100002910
Other languages
German (de)
English (en)
Other versions
EP2241641A3 (fr
EP2241641A2 (fr
Inventor
Martin Pohl
Michael Wibbeke
Wilfried Rostek
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.)
Benteler Automobiltechnik GmbH
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 EP2241641A2 publication Critical patent/EP2241641A2/fr
Publication of EP2241641A3 publication Critical patent/EP2241641A3/fr
Application granted granted Critical
Publication of EP2241641B1 publication Critical patent/EP2241641B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
    • 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
    • C21D1/18—Hardening; Quenching with or without subsequent tempering
    • 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
    • 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
    • C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
    • 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
    • C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
    • C21D8/0257—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment with diffusion of elements, e.g. decarburising, nitriding
    • 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
    • C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
    • C21D8/0405—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing of ferrous alloys
    • 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
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • 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
    • C21D9/48—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals deep-drawing sheets
    • 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

Definitions

  • the invention relates to a method for producing press-hardened components, in particular body parts of motor vehicles, from a blank of uncured, hot-forming steel sheet, in which the board is hot formed and hardened in a press tool for sheet metal profile, according to the preamble of claim 1.
  • DE 24 52 486 A1 includes a method for producing a hardened sheet metal profile from a board in a prior art press hardening process.
  • a board made of a hardenable steel is heated to hardening temperature and then hot-formed in a press tool and then hardened while the sheet-metal profile remains in the press tool. Since the sheet metal profile is clamped in the press tool during cooling in the course of the curing process, a product with good dimensional stability is obtained.
  • Hot forming and tempering in the press tool is a rational operation due to the combination of forming and tempering operation in a tool.
  • the WO 2008/024042 A1 discloses a method for producing press-hardened components, in particular body components from a blank of uncured, hot-forming steel sheet, wherein the board is hot-formed and hardened in a press tool to the sheet profile, wherein first a board is made whose geometry substantially corresponds to the settlement of the finished component and then the board is formed in a hot forming tool to the component and press-hardened, after which the component is provided with a surface coating.
  • EP 1 195 208 A2 a method for producing locally reinforced sheet metal formed parts, in which a composite sheet consisting of a base sheet and a smaller, locally arranged reinforcing sheet is formed in a hot forming tool and press-hardened.
  • the profile components made of sheet steel, in particular motor vehicle component are provided with a surface coating for protection against corrosion. It is known to apply the surface coating to the component by means of a thermal diffusion method. This too is among others in the WO 2005/018848 A1 explained.
  • a layer of zinc or a zinc alloy is applied as a surface coating.
  • the invention is based on the object of the prior art to further streamline the approach in the production of press-hardened components.
  • a printed circuit board is produced having a geometry which substantially corresponds to the unwinding of the finished component.
  • the geometry of the assembled board corresponds to the development of the finished component taking into account geometric changes to the component by the forming process.
  • this prefabricated board is formed in a hot forming tool to the component and press-hardened, after which the component is provided with a surface coating.
  • the formed and press-hardened component has the final geometry after the forming process.
  • the component is cooled down in the hot forming tool for the purpose of hardening.
  • the temperature of the component is lowered, to a temperature less than or equal to 300 ° C, preferably to a temperature between 180 ° C and 300 ° C, in particular to about 200 ° C. At this temperature range, warping of the deformed and press-hardened component can be avoided.
  • the invention is provided to use the residual heat of the component still present from the hot-forming process and to go into the coating process with this starting temperature or intermediate temperature.
  • the formed and press-hardened component is then transferred into the coating process at the temperature which it has after leaving the hot-forming tool and which lies between 180 ° C. and 300 ° C., in particular at about 200 ° C., according to the invention. This leads to a further increase in the efficiency of the process and shortens the time for the heat treatment in the context of the surface coating process.
  • the surface coating of the press-hardened component is applied by a diffusion process with a heat treatment of the component, in which the component is brought into contact with a metal powder.
  • the profile component is in this case over a period of 0.25 h to 3.0 h of a heat treatment at subjected to a temperature between 350 ° C and 410 ° C, wherein by a diffusion process between the steel sheet and the metal powder solid, cohesive iron-zinc alloy layers are formed with a layer thickness between 5 microns and 40 microns.
  • the three-dimensionally shaped components in particular body components such as B-pillars, door impact beams or side skirts, can be provided with a high-quality, durable coating, which on the one hand ensures high corrosion protection and on the other hand is weldable.
  • the profile components can be coated without incurring adverse strength losses due to the heat treatment.
  • a metal powder with the main constituent zinc or zinc oxide is used, which optionally contains additives for improving the chemical and physical properties of the coating.
  • the surface coating produced is uniform and relatively ductile.
  • the press-hardened profile components are subjected to a surface treatment.
  • a cleaning of the profile components takes place, so that the profile components are metallic blank. This can be done for example by a pickling. Preference is given to a dry cleaning, in particular sand blasting.
  • the thickness of the coating depends largely on the temperature and the treatment time.
  • the heat treatment is carried out - as mentioned - at a temperature between 350 ° C and 410 ° C, in particular in a temperature range from 370 ° C to 400 ° C, preferably at about 380 ° C.
  • the heat treatment is divided into a heating phase until reaching the treatment temperature and a holding phase in which the treatment temperature is maintained for a certain period of time.
  • the heating phase extends over a period of time that is less than or equal to 0.25 hours.
  • the heat treatment is completed after the heating phase. Basically, therefore, it can be assumed that a holding phase, the over a period of 0 h to 2 h.
  • the holding temperature is in the specified temperature range above 350 ° C.
  • the coated profile components are cooled uniformly.
  • the cooling should be less than 1 h.
  • the cooling can basically be done in air.
  • a cooling takes place actively by applying the coated profile components with a cooling medium.
  • active cooling by applying the coated profile components to a cooling medium is considered particularly expedient, in which the coated components after the heat treatment up to a temperature ⁇ 300 ° C, preferably to a temperature between 180 ° C and 300 ° C. , in particular about 200 ° C are cooled.
  • the aim of this active cooling measure is to avoid oxide layer formation on the surface of the coated components.
  • Protective or inert gas is preferably used as the cooling medium.
  • the cooling takes place under an inert gas atmosphere, ie in the treatment space in which the components are brought into contact with the metal powder and the surface coating is produced.
  • the entire edge contour cutting on the output board before the press hardening After forming and / or press hardening, no edge-side contour cutting is carried out. It is possible, however, that the board is punched before forming or after forming.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Articles (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (10)

  1. Procédé servant à fabriquer des composants durcis par une presse, en particulières des composants de carrosserie de véhicules automobiles, à partir d'une platine constituée d'une tôle d'acier non durcie, mise en forme à chaud, la platine étant mise en forme à chaud et durcie dans un outil de presse pour obtenir le profil de tôle, une platine étant produite dans un premier temps, dont la forme géométrique correspond essentiellement au composant fini déployé, puis la platine étant mise en forme et durcie par une presse dans un outil de mise en forme à chaud pour obtenir le composant, le composant étant pourvu par la suite d'un revêtement de surface, caractérisé en ce que le composant est refroidi lors du durcissement à la presse de manière à présenter une température inférieure ou égale (≤) à 300 °C, de préférence de manière à présenter une température comprise entre 180 °C et 300 °C, en particulier une température d'environ 200 °C, et en ce que le composant mis en forme à chaud et durci à la presse est alors amené à un processus de revêtement à la température qu'il présente en quittant l'outil de mise en forme à chaud et qui est comprise entre 180 °C et 300 °C, en particulier qui est de l'ordre d'environ 200 °C.
  2. Procédé selon la revendication 1, caractérisé en ce que le revêtement de surface est appliqué par un processus de diffusion avec un traitement à chaud du composant, lors duquel processus le composant est amené en contact avec une poudre métallique.
  3. Procédé selon la revendication 2, caractérisé en ce que le processus de diffusion est réalisé à une température comprise entre 350 °C et 410 °C.
  4. Procédé selon la revendication 2 ou 3, caractérisé en ce que le traitement à chaud est réalisé pendant une durée allant de 0,25 h à 3,0 h.
  5. Procédé selon l'une quelconque des revendications 2 à 4, caractérisé en ce que le composant revêtu est refroidi à l'issue du traitement à chaud.
  6. Procédé selon la revendication 5, caractérisé en ce que le refroidissement du composant se fait sous une atmosphère au gaz inerte.
  7. Procédé selon la revendication 5 ou 6, caractérisé en ce que le composant revêtu est refroidi, à l'issue du traitement à chaud, jusqu'à présenter une température inférieure ou égale (≤) à 300 °C, de préférence une température comprise entre 180 °C et 300 °C, en particulier une température d'environ 200 °C.
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la platine est perforée avant la mise en forme.
  9. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la platine est perforée à l'issue de la mise en forme.
  10. Procédé selon l'une quelconque des revendications 1 à 9, caractérisé en ce que le durcissement à la presse est effectué de telle manière que des zones présentant des rigidités diverses apparaissent au niveau du composant.
EP20100002910 2009-04-16 2010-03-19 Procédé de fabrication de composants durcis par une presse Not-in-force EP2241641B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009017326A DE102009017326A1 (de) 2009-04-16 2009-04-16 Verfahren zur Herstellung von pressgehärteten Bauteilen

Publications (3)

Publication Number Publication Date
EP2241641A2 EP2241641A2 (fr) 2010-10-20
EP2241641A3 EP2241641A3 (fr) 2012-05-02
EP2241641B1 true EP2241641B1 (fr) 2015-04-29

Family

ID=42463316

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100002910 Not-in-force EP2241641B1 (fr) 2009-04-16 2010-03-19 Procédé de fabrication de composants durcis par une presse

Country Status (4)

Country Link
US (1) US9822421B2 (fr)
EP (1) EP2241641B1 (fr)
DE (1) DE102009017326A1 (fr)
ES (1) ES2538341T3 (fr)

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TWI268806B (en) * 1999-09-15 2006-12-21 Rohm & Haas A catalyst useful for oxidation of alkanes
DE10333165A1 (de) * 2003-07-22 2005-02-24 Daimlerchrysler Ag Pressgehärtetes Bauteil und Verfahren zur Herstellung eines pressgehärteten Bauteils
ES2858225T3 (es) * 2010-12-24 2021-09-29 Voestalpine Stahl Gmbh Procedimiento para producir elementos estructurales templados
DE102013214250A1 (de) * 2013-07-22 2015-01-22 Bayerische Motoren Werke Aktiengesellschaft Pressgehärtetes Blechbauteil mit Lochung und Verfahren zu dessen Herstellung
WO2017017483A1 (fr) 2015-07-30 2017-02-02 Arcelormittal Tôle d'acier revêtue d'un revêtement métallique à base d'aluminium
WO2017017484A1 (fr) * 2015-07-30 2017-02-02 Arcelormittal Procédé pour la fabrication d'une pièce durcie qui ne présente pas de problèmes lme (liquide metal embrittlement - fragilité par les métaux liquides)
WO2017017485A1 (fr) 2015-07-30 2017-02-02 Arcelormittal Procédé de fabrication d'une pièce phosphatable à partir d'une tôle d'acier revêtue d'un revêtement métallique à base d'aluminium
DE102015220347B4 (de) * 2015-10-20 2018-06-21 Thyssenkrupp Ag Verfahren zum Herstellen eines Bauteils für ein Fahrzeug
CN111434405B (zh) * 2019-06-12 2021-10-15 苏州普热斯勒先进成型技术有限公司 一种热冲压件的制备方法及装置

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US4130933A (en) * 1977-09-12 1978-12-26 Arco Industries Corporation Forming and coating apparatus
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DE10049660B4 (de) * 2000-10-07 2005-02-24 Daimlerchrysler Ag Verfahren zum Herstellen lokal verstärkter Blechumformteile
DE10333165A1 (de) 2003-07-22 2005-02-24 Daimlerchrysler Ag Pressgehärtetes Bauteil und Verfahren zur Herstellung eines pressgehärteten Bauteils
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Also Published As

Publication number Publication date
US9822421B2 (en) 2017-11-21
EP2241641A3 (fr) 2012-05-02
ES2538341T3 (es) 2015-06-19
DE102009017326A1 (de) 2010-10-21
US20100319426A1 (en) 2010-12-23
EP2241641A2 (fr) 2010-10-20

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