WO2007028475A2 - Procede pour realiser un composant trempe a la presse - Google Patents

Procede pour realiser un composant trempe a la presse Download PDF

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Publication number
WO2007028475A2
WO2007028475A2 PCT/EP2006/007917 EP2006007917W WO2007028475A2 WO 2007028475 A2 WO2007028475 A2 WO 2007028475A2 EP 2006007917 W EP2006007917 W EP 2006007917W WO 2007028475 A2 WO2007028475 A2 WO 2007028475A2
Authority
WO
WIPO (PCT)
Prior art keywords
press
component
forming
hot
speed
Prior art date
Application number
PCT/EP2006/007917
Other languages
German (de)
English (en)
Other versions
WO2007028475A3 (fr
Inventor
Bernd Dreher
Steffen Helwing
Uwe Mattes
Thomas Schweiker
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=37421079&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2007028475(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Daimler Ag filed Critical Daimler Ag
Publication of WO2007028475A2 publication Critical patent/WO2007028475A2/fr
Publication of WO2007028475A3 publication Critical patent/WO2007028475A3/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
    • 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
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment 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
    • C21D8/04—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
    • 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
    • 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

Definitions

  • the invention relates to a method for producing a press-hardened component according to the preamble of patent claim 1 and to a component produced by this method according to the preamble of patent claim 8.
  • a press-hardened component and a method for producing a component by a press-hardening process is known.
  • a semi-finished product is first cold formed by a drawing process, then heated and press-cured in a hot-forming tool.
  • the invention has for its object to provide a press hardening process for components made of high-strength steel, in which the required deformation of the component can be realized in a forming step.
  • the higher forming speed compared to the speed of the structural transformation process makes it possible to limit the entire transformation of the semi-finished products made of high-strength steel into complex components solely to hot working of the semi-finished product, which is accomplished in a single stroke. In this case, even high drawing depths can be realized reliably without any problem.
  • the cost and the equipment required for manufacturing compared to the generic method can be significantly reduced.
  • the cycle times in production can be shortened with this method.
  • the forming speed is in the range above 65mm / s.
  • the forming speeds which can be realized with the help of hitherto used for press hardening industrial presses (claim 2).
  • the forming speed is above 150 mm / s. Moving the forming speed in this area, the effect of the unfinished structural transformation can be used with a good cost / benefit ratio, and the achievable by the method drawing depth can be greatly increased (claim 3).
  • the forming speed is above 300 mm / s. With such a speed even highly complex components made of higher-strength steel materials, which are otherwise virtually non-deformable, can be produced in the desired manner (claim 4).
  • the component is only partially cured.
  • components with local reinforcements and adjacent uncured areas can also be easily produced by the method (claim 5).
  • the heating of the semifinished product takes place in a continuous furnace.
  • the method can be used in series production, since several semi-finished products can be heated in parallel (claim 6).
  • the component consists of a high-strength steel material, in particular of the material 22MnB5.
  • the advantages of the process are fully apparent, because they would have to be subjected to the generic low forming speeds above a certain drawing depth of a previous cold forming (claim 9 and 10).
  • the component has a coating for corrosion protection, in particular a coating of an aluminum-silicon material.
  • a coating for corrosion protection in particular a coating of an aluminum-silicon material.
  • Fig. 1 is a schematic representation of the process sequence in the generic method
  • Fig. 2 is a schematic representation of the process flow in the inventive method
  • Fig. 3 is a detail view of a used
  • FIG. 4 shows the course of the achievable drawing depths in
  • FIG. 1 shows schematically the sequence of the generic, hitherto industrially used press hardening process for the production of a component 1.
  • a steel sheet 5 located on a coil 15 is first fed via a roller 17 to a cutting device 19.
  • a board 21 of appropriate size is cut from the steel sheet 5.
  • this is also referred to as semi-finished 3 board 21 a cold forming device 23 is supplied, in which it undergoes a first forming step in the cold state of the material, for example, a deep drawing process.
  • the semi-finished product 3 is heated in an oven 25 to a temperature which is above the temperature at which a structural transformation of the material of the semifinished product 3 takes place in the austenitic state.
  • this temperature is between 700 0 C and 1100 0 C.
  • the heated blank is then inserted by means of a manipulator 27 in a hot forming tool 7.
  • the component 1 is finished and rapidly cooled, whereby a fine-grained martensitic or bainitic structure is set.
  • This step corresponds to a hardening of the component 1 and allows the increase of the strength of the material. In this case, both the entire component 1 can be cured as well as individual areas of the component 1. If the desired degree of hardness is reached, the component 1 is removed from the hot forming tool 7. It now has both the desired material properties and the desired final contour.
  • a way out is the method shown schematically in FIG. 2.
  • the actual method is characterized by a dashed box.
  • the additional cold forming step is saved by greatly increasing the speed 9 of hot working forming.
  • the achievable draw depth 39 is significantly increased, so that the entire required deformation of the semifinished product 3 in a single process step, in the hot forming tool 7, can be achieved.
  • the semifinished product 3 may be a correspondingly cut sheet metal blank 21 made of a high-strength steel material. Alternatively, however, locally reinforced sheets, Taylored blanks, or Taylored Rolled Blanks, which are welded together from several pieces of sheet metal with different thicknesses, can be used as semifinished products 3.
  • the semifinished product 3 is preferably provided with a coating 14 made of an anti-corrosion alloy, for example an aluminum-silicon alloy.
  • the semifinished product 3 is, as shown in Fig. 2, with the aid of a manipulator 27 to the oven 25, which is designed in this example as a continuous furnace 11, respectively.
  • the temperature of the semifinished product 3 after leaving the continuous furnace 11 is in the material used in this example between 880 0 C and 960 0 C.
  • the aluminum-silicon coating 14 in addition a scaling of the surface of the semifinished product 3 is prevented during heating.
  • the semi-finished product 3 is subjected to hot working.
  • a high-speed press 13 is used as the hot-forming tool 7, which can realize a high forming speed 9 in comparison with a hot-forming tool 7 used industrially hitherto in FIG.
  • this high forming speed 9 which is significantly higher than the speed in conventional thermoforming, which is for example 65 mm / second, it is achieved that the deformation of the component 1 is already largely or completely completed before the curing of the component 1, ie the microstructure transformation is completed.
  • the time window, in which high degrees of deformation are possible before the curing sets in, is thus better utilized the higher the forming speed 9 is. In this optimal use of the curing window is the great advantage of a high-speed forming 9.
  • the finished component 1 is removed from the hot forming tool 7 by another manipulator 27 and stacked.
  • the method of FIG. 2 thus corresponds to the method shown in FIG. 1 with omission of the cold forming step.
  • the press 13 or the hot forming tool 7 can be additionally cooled in order to achieve rapid curing and thus a finer microstructure of the component 1.
  • FIG. 3 shows a detail of a hot forming tool 7 used.
  • the semifinished product 3, which has a coating 14 is held between a drawing ring 31 and a hold-down 33.
  • a punch 35 which moves at a forming speed 9
  • the deformation of the semifinished product 3 is effected.
  • two different punches 35 'and 35' ' are indicated by different shades, which differ by the angle of rise 36 and thus can also produce different deformations, with lower angles of rise as in the punch 35' also produce a bowl with steeper walls.
  • the reached drawing depth 39 and the degree of deformation of the finished component 1 is also shown.
  • Fig. 4 is a plot of the achievable draw depth 39 on the ordinate in dependence on the forming speed 9, with which the punch 35 moves, on the abscissa, plotted.
  • FIG. 4 shows the percentage increase 41 of the drawing depth 39, based on the drawing depth 39 that can be achieved at a currently customary forming speed 9 of 65 mm / second, as a function of the respectively set one Forming speed 9. Shown here is in each case the average over all experiments shown in Fig. 4 with different parameters at a forming speed 9.
  • a forming speed 9 of 150 mm / second in this material an increase of the possible drawing depth 39 by about 16 percent possible.
  • a further considerable increase in the drawing depth can be achieved.
  • components 1 made of dual-phase steel DP 500 and DP 600) can be manufactured without much difficulty.
  • crash-relevant components 1 such as structural components of the vehicle body construction.
  • these are, for example, parts in the region of the side wall of the motor vehicle, which must not deform during an impact.
  • this relates to columns, sills, roof frames, cross members, side members and the end wall.
  • Other components 1 are, for example, bumpers, cross members or tunnel reinforcements, that is, in principle, parts that serve the occupant protection. Due to the high strength of the components 1, their wall thicknesses can be reduced, whereby great advantages can be achieved in terms of lightweight construction. This is particularly true in armored vehicles to bear whose side wall parts can now be made considerably easier by the inventive method. It is even conceivable to design the armor as a planking part.
  • the method and the component 1 produced by the method are not limited to those shown Embodiments.
  • the specific procedure may differ from that shown in FIG. 2.

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

Abstract

L'invention concerne un procédé pour réaliser un composant trempé à la presse à partir d'un demi-produit en tôle d'acier non trempée pouvant être mise en forme à chaud, procédé selon lequel le demi-produit est chauffé puis trempé à la presse dans un outil de mise en forme à chaud. L'objectif de cette invention est d'augmenter les profondeurs d'emboutissage pouvant être atteintes lors de la trempe à la presse. A cet effet, la vitesse de mise en forme à laquelle le demi-produit est mis en forme dans l'outil de mise en forme à chaud est si élevée que le processus de transformation d'une structure austénitique en une structure martensitique ou bainitique n'est terminé qu'une fois le processus de mise en forme achevé. Avantageusement, cette vitesse de mise en forme est supérieure à 65 mm/s. Ladite invention concerne également un composant réalisé selon ledit procédé. Ce composant peut présenter un revêtement anticorrosion en matériau aluminium-silicium.
PCT/EP2006/007917 2005-09-02 2006-08-10 Procede pour realiser un composant trempe a la presse WO2007028475A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510041741 DE102005041741B4 (de) 2005-09-02 2005-09-02 Verfahren zum Herstellen eines pressgehärteten Bauteils
DE102005041741.8 2005-09-02

Publications (2)

Publication Number Publication Date
WO2007028475A2 true WO2007028475A2 (fr) 2007-03-15
WO2007028475A3 WO2007028475A3 (fr) 2008-07-17

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PCT/EP2006/007917 WO2007028475A2 (fr) 2005-09-02 2006-08-10 Procede pour realiser un composant trempe a la presse

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DE (1) DE102005041741B4 (fr)
WO (1) WO2007028475A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2338618A1 (fr) * 2008-10-16 2011-06-29 Hyundai Hysco Procédé de fabrication d'un corps en acier très résistant pour la fabrication de produits de forme complexe
EP2227570B1 (fr) 2007-11-29 2017-01-25 Benteler Automobiltechnik GmbH Procédé de fabrication d'une pièce façonnée comprenant au moins deux zones structurelles à ductilité différente
CN111434404A (zh) * 2019-05-27 2020-07-21 苏州普热斯勒先进成型技术有限公司 一种耐腐蚀热冲压件的制造方法及装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20080221A1 (it) * 2008-03-21 2009-09-22 Bruno Gili Procedimento e macchina per la fabbricazione di profilati guida-molle
DE102009012940B4 (de) 2009-03-12 2017-12-07 Volkswagen Ag Verfahren zur Herstellung eines Bauteils, insbesondere eines Blechbauteils sowie Fertigungsstraße zur Herstellung des Bauteils
DE102009050997B4 (de) 2009-10-28 2017-07-13 Volkswagen Ag Verfahren und Umformvorrichtung zur Herstellung eines formgehärteten Bauteils
DE102010007955B4 (de) * 2010-02-12 2014-08-21 Johnson Controls Gmbh Verfahren zur Herstellung eines Bauteils sowie Vorrichtung
DE102010055148B4 (de) 2010-12-18 2016-10-27 Tu Bergakademie Freiberg Verfahren zur Herstellung formgehärteter Bauteile
DE102011010401A1 (de) * 2011-02-04 2012-08-23 Oerlikon Trading Ag, Trübbach Mit Cr-Si-N Schichten versehene Werkzeuge zum Formen oder Stanzen von heissen Metallplatten
DE102016100589A1 (de) * 2016-01-14 2017-07-20 Voestalpine Metal Forming Gmbh Verfahren und Vorrichtung zum Warmformen von Stahlblechen

Citations (6)

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Publication number Priority date Publication date Assignee Title
DE2452486A1 (de) * 1973-11-06 1975-05-07 Norrbottens Jaernverk Ab Verfahren zur herstellung eines werkstueckes aus gehaertetem stahl
EP1013785A1 (fr) * 1998-12-24 2000-06-28 Sollac Procédé de réalisation d'une pièce à partir d'une bande de tôle d'acier laminée et notamment laminée à chaud
KR20020012644A (ko) * 2000-08-08 2002-02-20 김대순, 김명철 보론함유 저탄소강을 이용한 박판 성형품 제작을 위한프레스 경화 공정
EP1253208A1 (fr) * 2001-04-27 2002-10-30 Benteler Automobiltechnik GmbH & Co. KG Procédé de fabrication d'un profilé en tôle durci
EP1380666A1 (fr) * 2002-07-11 2004-01-14 Nissan Motor Co., Ltd. Elément de structure recouvert d'aluminium et sa méthode de production
WO2005078144A1 (fr) * 2004-02-13 2005-08-25 Audi Ag Procede de production d'un element constitutif par deformation d'une platine et dispositif approprie pour mettre ledit procede en oeuvre

Family Cites Families (4)

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SE9602257L (sv) * 1996-06-07 1997-12-08 Plannja Hardtech Ab Sätt att framställa ståldetalj
DE19815022A1 (de) * 1998-04-03 1999-10-21 Daimler Chrysler Ag Ziehteile aus Federstahlblech, insbesondere als Leichtbau- oder Karosserieteil
DE10254695B3 (de) * 2002-09-13 2004-04-15 Daimlerchrysler Ag Verfahren zur Herstellung eines metallischen Formbauteils
JP5113385B2 (ja) * 2003-07-29 2013-01-09 フェストアルピネ シュタール ゲーエムベーハー 焼入れ鋼部品の製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2452486A1 (de) * 1973-11-06 1975-05-07 Norrbottens Jaernverk Ab Verfahren zur herstellung eines werkstueckes aus gehaertetem stahl
EP1013785A1 (fr) * 1998-12-24 2000-06-28 Sollac Procédé de réalisation d'une pièce à partir d'une bande de tôle d'acier laminée et notamment laminée à chaud
KR20020012644A (ko) * 2000-08-08 2002-02-20 김대순, 김명철 보론함유 저탄소강을 이용한 박판 성형품 제작을 위한프레스 경화 공정
EP1253208A1 (fr) * 2001-04-27 2002-10-30 Benteler Automobiltechnik GmbH & Co. KG Procédé de fabrication d'un profilé en tôle durci
EP1380666A1 (fr) * 2002-07-11 2004-01-14 Nissan Motor Co., Ltd. Elément de structure recouvert d'aluminium et sa méthode de production
WO2005078144A1 (fr) * 2004-02-13 2005-08-25 Audi Ag Procede de production d'un element constitutif par deformation d'une platine et dispositif approprie pour mettre ledit procede en oeuvre

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2227570B1 (fr) 2007-11-29 2017-01-25 Benteler Automobiltechnik GmbH Procédé de fabrication d'une pièce façonnée comprenant au moins deux zones structurelles à ductilité différente
EP2338618A1 (fr) * 2008-10-16 2011-06-29 Hyundai Hysco Procédé de fabrication d'un corps en acier très résistant pour la fabrication de produits de forme complexe
EP2338618A4 (fr) * 2008-10-16 2014-01-22 Hyundai Hysco Procédé de fabrication d'un corps en acier très résistant pour la fabrication de produits de forme complexe
CN111434404A (zh) * 2019-05-27 2020-07-21 苏州普热斯勒先进成型技术有限公司 一种耐腐蚀热冲压件的制造方法及装置

Also Published As

Publication number Publication date
DE102005041741B4 (de) 2010-03-18
WO2007028475A3 (fr) 2008-07-17
DE102005041741A1 (de) 2007-03-08

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