WO2010089103A1 - Procédé et four pour obtenir une pièce à travailler métallique avec des régions de ductilité différente - Google Patents

Procédé et four pour obtenir une pièce à travailler métallique avec des régions de ductilité différente Download PDF

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Publication number
WO2010089103A1
WO2010089103A1 PCT/EP2010/000664 EP2010000664W WO2010089103A1 WO 2010089103 A1 WO2010089103 A1 WO 2010089103A1 EP 2010000664 W EP2010000664 W EP 2010000664W WO 2010089103 A1 WO2010089103 A1 WO 2010089103A1
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WO
WIPO (PCT)
Prior art keywords
blank
furnace
blanks
transport mechanism
batches
Prior art date
Application number
PCT/EP2010/000664
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English (en)
Inventor
Franz Divjak
Berthold Scheuring
Original Assignee
Magna Ihv Gesellschaft Für Innenhochdruckverfahren Mbh
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 Magna Ihv Gesellschaft Für Innenhochdruckverfahren Mbh filed Critical Magna Ihv Gesellschaft Für Innenhochdruckverfahren Mbh
Publication of WO2010089103A1 publication Critical patent/WO2010089103A1/fr

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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
    • 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
    • C21D9/0006—Details, accessories not peculiar to any of the following furnaces
    • C21D9/0018—Details, accessories not peculiar to any of the following furnaces for charging, discharging or manipulation of charge
    • 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
    • C21D2221/00—Treating localised areas of an article

Definitions

  • the present invention generally relates to the field of steel parts and a method of making the same. More particularly, the present invention relates to a steei part with regions of different ductility and/or hardness as well as a method and an oven for making the same.
  • the present invention pertains to a method of heating at least two blanks for making a metal workpiece having regions of greater and lesser hardness, the invention having the features of the preamble of claim 1.
  • the invention also pertains to a furnace for heating at least two blanks or blank batches having the features of the preamble of claim 11.
  • shaped components should have a high strength over certain regions and other regions with a high ductility.
  • the column foot would advantageously be relatively ductile, while high strength properties would be advantageously established on the upper part of the column.
  • DE 197 43 802 C2 describes a process for producing a shaped article for motor vehicle components with regions of different ductility and with a starting billet, before or after pressing is only partially heated or starting from a prior homogeneous heating is subsequently heated in a targeted manner in the regions at which higher ductility is desired.
  • the subsequent heating for producing ductile regions has however the drawback that the shaped body can distort.
  • DE 197 23 655 Al describes a process for the partial hardening of a shaped body whereby a starting billet is homogeneously heated in a furnace and then hardened in a cooled pair of tools, whereby partial regions of the workpiece have hardening inhibited by slower cooling in that at these regions in the tool, recesses or thermally insulating inserts are disposed or in these regions in the tool the induction heating is applied.
  • the purpose of this process is to provide non- hardened regions in the shaped body at which, additional machining, for example, drilling can be carried out.
  • the method of DE 197 23 655 Al is problematical in the context of a hot-forming process since at the locations of the recesses in the tool, shaping cannot occur and with larger ductile regions, thermally insulating inserts are provided in the tool which limit the hardening and interfere with the shaping process so that breakage is possible.
  • the inductive hardening is possible only with finish-shaped parts and requires certain intrinsic operating steps. As a consequence the subsequent inductive hardening is expensive and has the danger of resulting in distortion.
  • European Patent EP 0 816 520 Bl describes a shaped article and a method for providing desired strength and hardening patterns over its length, whereby the shaped body, after its shaping, is inductively heated and then quenched to produce the hardened regions.
  • B-column which also has regions of different strengths.
  • the formation of the B-column is effected in a hot-forming process whereby starting from a blank or a preformed longitudinal profile, the workpiece is austenitized in a furnace and then shaped and hardened in a cooled tool.
  • the furnace large-area regions of the workpiece are insulated against the effect of the temperature whereby in these regions the austenitization temperature is not reached and as a consequence during the hardening no martensitic structure arises in the hardening and shaping tool.
  • DE 200 14 361 Ul proposes to initially completely austenitize a pre-formed blank or longitudinal section and, during the transport to the hardening tool, to limit the cooling rate in a targeted manner in a region so that it is not excessively rapid, for example by blowing to bring it to a temperature clearly below the austenitization temperature.
  • the hardening tool there may thus no purely martensitic structure formation but rather the formation of a mixed structure with clear ferrite/bainite components which has ductile properties.
  • a motion of a transport device for transporting the workpiece through the furnace is interrupted for a predetermined amount of time so that the portion of the workpiece that projects from the oven outlet is allowed to slowly cool by the contact to ambient air while the workpiece portion that remains within the furnace is kept at or further heated to the austenitization temperature of the hardenable workpiece material.
  • the transport mechanism's motion can be interrupted either by decoupling the workpiece from a roll mechanism of the transport device by means of push rods lifting the workpiece from the roll, or by providing a separate transport mechanism extending throughout the furnace for each workpiece, which transport mechanism can be controlled to stop separately and transports the workpiece from one end of the furnace to the other end.
  • the first and/or the at least second and/or third transport mechanisms may be a roller mechanism.
  • Roller mechanisms are an appropriate transport mechanism for transporting metal workpieces through a furnace in connection with the invention, as roller mechanisms are durable and reliable.
  • the furnace may be a continuous furnace through which the at least first and second blank or blank batches are moved. Continuous furnaces may be advantageous, for instance, when the inventive method is used and conducted in a line production.
  • the at least first and second blank or blank batches may be heated to austenitization temperature.
  • it may be advantageous to heat said workpieces to austenitization temperature, so that hardening effects in at least some portions of the workpiece may be achieved upon rapid cooling or quenching in subsequent process steps.
  • At least one of said at least first and second blank or blank batches may be centered in a centering position at said furnace outlet. This may allow controlling the blank position at the outlet and to thereby better control the position of the blank at the furnace outlet, which may influence the position of heated and cooled portions of the blank.
  • At least one of said first and second blank or blank batches may be moved at least partially out of a furnace portion to said furnace outlet and then partially back into a cooling position at said outlet in which cooling position a portion of a respective blank is allowed to cool.
  • Each respective blank may be moved further into the furnace outlet in the centering position than a cooling position. This may allow centering each blank to achieve a desired distribution between heated and cooled portions of the blank or to align its position before it is transferred to a process situation.
  • the at least second and/or third transport mechanisms may be operated while the first transport mechanism of the furnace may be stopped or slowed. This may allow flexible management of the logistics at the furnace outlet. For instance, it may allow handling said at least first and second blank or blank batches at the furnace outlet and may allow slowing or stopping a further supply of heated blanks to the furnace outlet until those blanks present at said furnace outlet are removed.
  • the first transport mechanism may be operated together with said at least second or third transport mechanism while the other of said third or second transport mechanism is stopped or accelerated. This may allow more flexible control of the output of the furnace and handling of heated workpieces within the furnace and at the furnace outlet. It would allow, for instance, holding one blank or blank batch at the second transport mechanism while the first transport mechanism and the third transport mechanism together transport another blank to the furnace outlet.
  • the present invention may also provide a method of making a metal workpiece having regions of greater and lesser hardness comprising the steps of moving a first blank through a continuous furnace on a first roller mechanism, moving a second blank offset from the first blank through the continuous furnace on the first roller mechanism, heating the first and second blanks to austenitization temperature in the continuous furnace, and moving the first and second blanks independently from each other to a furnace outlet on at least a second and third roller mechanism.
  • furnace for heating at least two blanks or blank batches according to claim 1 1.
  • Such a furnace is simplified and less complex than the furnaces known from the prior art because the furnace outlet now comprises at least a second and third transport mechanism for transporting the at least two blanks while there is one transport mechanism inside the furnace portion.
  • At least one of said transport mechanisms may be a roller mechanism. Roller mechanisms may be advantageous because they are durable and reliable.
  • the at least second and third transport mechanisms may operate independently from each other. This can simplify the handling of blanks at the furnace outlet and may allow operating the furnace outlet more flexibly. "Independently” shall mean that said transport mechanisms may be controlled separately so that blanks thereon may be moved differently from each other.
  • a centering device may be provided at said furnace outlet.
  • Using a centering device may allow increasing the precision as the blanks may be centered prior to moving them back into the furnace for partial cooling, and/or prior to transferring the heated blanks to subsequent process stations such as forming tools.
  • said at least second and third transport mechanisms may be operated at different speeds than the first transport mechanism. This can allow increasing the flexibility in handling the blank at the furnace outlet because handling time may be saved due to moving the blanks faster on the at least second and third transport mechanisms.
  • the at least second and third transport mechanisms may be operated in different directions at the same time. This may allow moving blanks on said second and third transport mechanisms back and forth at the furnace outlet and may even allow at least partially reinserting blanks into the furnace.
  • said first transport mechanisms may be operated independently from each of said further transport mechanisms.
  • independently shall mean that the first transport mechanism may be operated differently from each of said further transport mechanisms insofar as each further transport mechanism may be operated faster or slower than the first transport mechanism and may operate in different directions.
  • the operation of all transport mechanisms may mainly be dependent on the loading pattern, for instance, the offset and number of tracks of the furnace. Operating said first transport mechanism independently/differently from each of said further transport mechanisms may allow more flexibly handling blanks in said furnace.
  • a continuous furnace for heating at least two blanks comprising a blank feed, a continuous furnace portion for transporting the at least two blanks offset from one another on at least 2 oven tracks, said at least two blanks being transported on a first roller mechanism, and a furnace outlet for receiving the at least two blanks from the continuous furnace and for transporting the at least two blanks on at least a second and third roller mechanism.
  • FIG. 1 shows a schematic exemplary presentation of a process in accordance with the invention
  • FIG. 2 shows a schematic example of an oven/furnace and an oven/furnace outlet in accordance with the present invention at a first point in time;
  • FIG. 3 shows a schematic example of an oven/furnace and an oven/furnace outlet in accordance with the present invention at a second point in time;
  • FIG. 4 shows a schematic example of an oven/furnace and an oven/furnace outlet in accordance with the present invention at a third point in time;
  • FIG. 5 shows a schematic example of an oven/furnace and an oven/furnace outlet in accordance with the present invention at a fourth point in time;
  • Fig. 6 shows an example of a formed workpiece having regions of different ductility in accordance with the invention.
  • a workpiece may be provided having regions of different ductility.
  • the present invention may also provide a method and an oven to produce such a workpiece.
  • the present invention provides an economic method and an apparatus for producing workpieces with regions of different ductility having reduced cycle times.
  • the terms “furnace” and “oven” are used interchangeably in the entire disclosure.
  • Fig. 1 shows a schematic presentation of a process in relation with the invention in which a furnace 1 is provided to completely heat a blank 2, for instance, to austenitization temperature, as shown in a first phase indicated with reference numeral 3 in Fig. 1.
  • a portion of the blank 2 protrudes from a furnace outlet 5 so that the portion projecting from the furnace outlet 5, such as a lower part 6 of a blank, is allowed to slowly cool while an upper part, such as indicated by the reference numeral 7, stays within the furnace and is kept at a desired temperature, such as austenitization temperature.
  • the lower part 6 of the blank 2 may correspond in a particular example to the toe area 8 of a B-pillar 9 for a motor vehicle while an upper part 7 may correspond to longitudinal pillar structure of the B-pillar 9.
  • the lower part 6 thereby forms an area of cooling 11, for instance, cooling by air cooling.
  • An exemplary workpiece is described in connection to Fig. 6 hereinafter.
  • the blank 2 is then transferred to a process station, for instance, a hot stamping tool that forms and rapidly cools, i.e. quenches the blank in a die 14 in order to obtain a workpiece having regions of greater and lesser hardness.
  • a hot stamping tool that forms and rapidly cools, i.e. quenches the blank in a die 14 in order to obtain a workpiece having regions of greater and lesser hardness.
  • the workpieces are made from hardenable steel.
  • the basic process to produce such workpieces may accordingly comprise the steps of heating a blank 2 in an oven or furnace 1 to an austenitization temperature, then transport a predetermined portion of the blank 2 outside the oven or furnace 1 so that this portion of the blank 2, e.g. lower part 6, is allowed to air cool for a predetermined amount of time while the remaining portion of the blank 2, i.e. upper part 7, remains in the oven at austenitization temperature, which can be about 920 to 950° C but depends on the material of the blank 2. After a portion of the blank 2 was allowed to air cool, the blank 2 is transferred to a hot stamping tool 13 where the blank 2 is formed and allowed to cool.
  • Fig. 2 shows a schematic example of an oven/furnace and an oven/furnace outlet 5 in accordance with the present invention at a first point in time.
  • one or more blanks 2 are placed offset from each other on at least two oven tracks 15 in the furnace portion 16 and are then heated to austenitization temperature in a furnace portion 16 (dark grey area).
  • the furnace 1 may be a continuous furnace, such as a roller hearth furnace for example.
  • the blanks 2 are transported through the oven by means of one transport mechanism, such as one set of rollers. It is possible to use other transport mechanisms such as conveyors instead of rollers.
  • Fig. 2 also shows that the furnace 1 comprises a blank feed 17 where the blanks 2 are inserted.
  • Fig. 2 through Fig. 5 also show that not only single blanks but also blank batches 19 may be inserted into the blank feed and heated in the furnace 1.
  • An arrow denoted with the numeral 18 indicates the process flow direction from the blank feed 17 through the furnace portion 16 to the furnace outlet 5.
  • the blanks 2 or blank batches 19 are numbered by the white digits shown inside each of the black boxes indicating the blanks 2.
  • the blanks 2 of batch No. 1 are subsequently moved to the oven/furnace outlet 5 in this example on a divided roller system 20, forming the second and third transport mechanisms, and centered in a centering device 21.
  • a divided roller system 20 for example two or more different roller tracks are provided, so that the blanks 2 arriving from the at least two different oven tracks 15 can be separately moved in and out of the furnace 1 for the purpose of centering the workpieces for partial air cooling and subsequently for hot stamping.
  • the furnace outlet 5 and the transport mechanisms at the furnace outlet comprise respective drives and controls to move the blanks 2 back and forth.
  • a portion of the blanks 2 or blank batches 19 is subsequently moved back into the furnace 1 from the oven/furnace outlet 5 so that the portion of the blank 2 that is moved back into the furnace 1 is kept at austenitization temperature and the portion of the blank 2 that is protruding into the oven/furnace outlet 5 is allowed to air cool for a predetermined amount of time. It is noted that the blanks 2 are now on the divided roller tracks 29 of the oven outlet.
  • FIG. 5 blanks 1 are completely moved out of the furnace again on the divided roller system 20 at the oven outlet where they are centered and subsequently will be hot stamped in the hot stamping tool 13 comprising the die 14.
  • the die 14 is cooled so that the blank 2 or workpiece, respectively, can be quenched, i.e. rapidly cooled for hardening during the forming operation of the hot forming tool 13.
  • Figs. 3 and 5 it is also shown that the blanks 2 or blank batch 19 of blank batch No. 1 are in the centering device 21 where they are in a centering position. In said centering position, both blanks 2 of the blank batch 19 are moved further out from or into the furnace outlet 5 than in the cooling position, which is assumed and indicated by the blanks 2 or blank batch 19 of the group No. 2 shown in Figs. 3 and 5.
  • the transport mechanisms of the furnace outlet 5 can be driven in opposite directions and independently from each other. That means, once the heated blank batch 19 can be handled by the transport mechanism of the furnace outlet shown on the right in Fig. 2 through Fig. 5 may move them out of the furnace independently of the operation of the transport mechanism of the furnace outlet shown on the left in said figures. That means that the transport mechanisms may operate differently in different directions and/or at different speeds.
  • the supply of additional heated blanks, for instance, blank 2, group No. 3, may be considered when controlling the second and third transport mechanism at the furnace outlet.
  • the second and third transport mechanisms at the furnace outlet 5 may operate faster than the first transport mechanism inside furnace portion 16 so that handling of blanks 2 at the furnace outlet 5 may be carried out quickly and in a time saving manner while the first transport mechanism may run slower so that the furnace portion 16 may be designed to be shorter.
  • the oven or furnace outlet 5 is provided with a divided roller mechanism to receive the blanks from the different oven tracks 15. While passing through the oven or furnace 1 , the blanks 2 are offset from each other and are moved on separate tracks 15 but on the same set of rollers or roller mechanism.
  • the divided roller transport mechanism at the oven or furnace outlet 5 allows reducing the cycle time and hence is more economical.
  • a workpiece can be formed with at least two different material properties at different locations of the workpiece.
  • FIG. 6 an example of a workpiece with tailored properties in accordance with the present invention is presented.
  • the toe area 8 of a B-pillar 9 was partially air cooled before the hot stamping process was performed, resulting in a toe area 8 with decreased hardness but increased ductility in comparison to the remaining portion, i.e. longitudinal B-pillar structure 10, of the B-pillar that was maintained at austenitization temperature.

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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)
  • Heat Treatment Of Articles (AREA)

Abstract

L'invention concerne un procédé de chauffage d'au moins deux flans pour obtenir une pièce à travailler métallique avec des régions de plus grande et de moins grande dureté, lequel procédé comporte les étapes consistant à déplacer un premier flan ou un premier lot de flans et un second flan ou un second lot de flans décalés dudit premier flan ou dudit premier lot de flans dans un four sur un premier mécanisme de transport, et à chauffer lesdits premier et second flans ou lesdits lots de flans dans le four en continu. L'invention concerne également un four pour chauffer au moins deux flans ou lots de flans, lequel four comporte un distributeur de flan, une partie four comportant un premier mécanisme de transport pour transporter les deux flans, ou plus, ou les deux lots de flans, ou plus, décalés les uns des autres, et une sortie de four pour recevoir les deux flans, ou plus, ou les deux lots de flans, ou plus, de ladite partie four et pour transporter les deux flans, ou plus. L'objectif de la présente invention est de procurer un procédé et un four améliorés qui sont moins complexes que l'état de la technique. Ledit procédé est caractérisé par le déplacement desdits premier et second flans, ou plus, ou desdits lots de flans indépendamment les uns des autres vers une sortie de four sur au moins un deuxième et un troisième mécanisme de transport, ainsi qu'un four qui est caractérisé en ce que ladite sortie de four comporte au moins un deuxième et un troisième mécanisme de transport.
PCT/EP2010/000664 2009-02-03 2010-02-03 Procédé et four pour obtenir une pièce à travailler métallique avec des régions de ductilité différente WO2010089103A1 (fr)

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US14953309P 2009-02-03 2009-02-03
US61/149,533 2009-02-03

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2548975A1 (fr) * 2011-07-20 2013-01-23 LOI Thermprocess GmbH Procédé et dispositif de fabrication d'un composant métallique durci doté d'au moins deux zones ayant une ductilité différente
CN103173606A (zh) * 2011-12-23 2013-06-26 本特勒尔汽车技术有限公司 用于制造汽车构件的方法以及汽车构件
CN103827325A (zh) * 2011-09-16 2014-05-28 本特勒尔汽车技术有限公司 用于通过热成形制造结构构件和底盘构件的方法和加热站
CN105026582A (zh) * 2013-02-01 2015-11-04 爱信高丘株式会社 红外炉、红外加热方法以及通过使用该方法而制造的钢板
CN105074017A (zh) * 2013-02-01 2015-11-18 爱信高丘株式会社 红外加热方法、钢板的红外加热和成型方法及由此获得的汽车部件、以及红外加热炉

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US1931454A (en) * 1932-12-28 1933-10-17 Mathews Conveyer Co Conveying mechanism
DE19723655A1 (de) 1996-06-07 1997-12-11 Ssab Hardtech Ab Verfahren zur Herstellung von Stahlblechprodukten
DE19743802C2 (de) 1996-10-07 2000-09-14 Benteler Werke Ag Verfahren zur Herstellung eines metallischen Formbauteils
DE20014361U1 (de) 2000-08-19 2000-10-12 Benteler Werke Ag B-Säule für ein Kraftfahrzeug
EP0816520B1 (fr) 1996-06-28 2001-10-04 Toyota Jidosha Kabushiki Kaisha Objets formés par pressage et procédé pour leur renforcement
DE102006054389A1 (de) * 2006-11-17 2008-05-21 Voestalpine Automotive Holding Gmbh Verfahren zum gezielten Erzeugen einer definierten Härte und/oder einer definierten Festigkeit von pressgehärteten und/oder warmumgeformten und/oder direkt und/oder indirekt umgeformten Blechbauteilen
EP2110448A2 (fr) 2008-04-17 2009-10-21 Schwartz, Eva Procédé et four à passage continu destinés au chauffage de pièces à usiner

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Publication number Priority date Publication date Assignee Title
US1931454A (en) * 1932-12-28 1933-10-17 Mathews Conveyer Co Conveying mechanism
DE19723655A1 (de) 1996-06-07 1997-12-11 Ssab Hardtech Ab Verfahren zur Herstellung von Stahlblechprodukten
EP0816520B1 (fr) 1996-06-28 2001-10-04 Toyota Jidosha Kabushiki Kaisha Objets formés par pressage et procédé pour leur renforcement
DE19743802C2 (de) 1996-10-07 2000-09-14 Benteler Werke Ag Verfahren zur Herstellung eines metallischen Formbauteils
DE20014361U1 (de) 2000-08-19 2000-10-12 Benteler Werke Ag B-Säule für ein Kraftfahrzeug
DE102006054389A1 (de) * 2006-11-17 2008-05-21 Voestalpine Automotive Holding Gmbh Verfahren zum gezielten Erzeugen einer definierten Härte und/oder einer definierten Festigkeit von pressgehärteten und/oder warmumgeformten und/oder direkt und/oder indirekt umgeformten Blechbauteilen
EP2110448A2 (fr) 2008-04-17 2009-10-21 Schwartz, Eva Procédé et four à passage continu destinés au chauffage de pièces à usiner
DE102008055980A1 (de) 2008-04-17 2009-10-29 Schwartz, Eva Verfahren und Durchlaufofen zum Erwärmen von Werkstücken

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2548975A1 (fr) * 2011-07-20 2013-01-23 LOI Thermprocess GmbH Procédé et dispositif de fabrication d'un composant métallique durci doté d'au moins deux zones ayant une ductilité différente
CN103827325A (zh) * 2011-09-16 2014-05-28 本特勒尔汽车技术有限公司 用于通过热成形制造结构构件和底盘构件的方法和加热站
CN103827325B (zh) * 2011-09-16 2016-01-20 本特勒尔汽车技术有限公司 用于通过热成型制造结构构件和底盘构件的方法和加热站
US9616488B2 (en) 2011-09-16 2017-04-11 Benteler Automobiltechnik Gmbh Method for producing structural components and chassis components by hot forming, and heating station
CN103173606A (zh) * 2011-12-23 2013-06-26 本特勒尔汽车技术有限公司 用于制造汽车构件的方法以及汽车构件
CN105026582A (zh) * 2013-02-01 2015-11-04 爱信高丘株式会社 红外炉、红外加热方法以及通过使用该方法而制造的钢板
CN105074017A (zh) * 2013-02-01 2015-11-18 爱信高丘株式会社 红外加热方法、钢板的红外加热和成型方法及由此获得的汽车部件、以及红外加热炉
US10519523B2 (en) 2013-02-01 2019-12-31 Aisin Takaoka Co., Ltd. Infrared heating method, infrared heating and forming method of steel sheet and automobile component obtained thereby, and infrared heating furnace

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