EP2478121A1 - Procédé de prétraitement et de préparation d'une pièce de tôle - Google Patents

Procédé de prétraitement et de préparation d'une pièce de tôle

Info

Publication number
EP2478121A1
EP2478121A1 EP10757037A EP10757037A EP2478121A1 EP 2478121 A1 EP2478121 A1 EP 2478121A1 EP 10757037 A EP10757037 A EP 10757037A EP 10757037 A EP10757037 A EP 10757037A EP 2478121 A1 EP2478121 A1 EP 2478121A1
Authority
EP
European Patent Office
Prior art keywords
sheet metal
metal part
temperature range
metallic layer
subsequent processing
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.)
Granted
Application number
EP10757037A
Other languages
German (de)
English (en)
Other versions
EP2478121B1 (fr
Inventor
Mathias Kotzian
Roland Malek
Mohamed Mekkaoui Alaoui
Dieter Niehues
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.)
Volkswagen AG
Original Assignee
Volkswagen 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
Application filed by Volkswagen AG filed Critical Volkswagen AG
Publication of EP2478121A1 publication Critical patent/EP2478121A1/fr
Application granted granted Critical
Publication of EP2478121B1 publication Critical patent/EP2478121B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • C21D1/78—Combined heat-treatments not provided for above
    • 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
    • C21D9/005—Furnaces in which the charge is moving up or down
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/673—Quenching devices for die quenching

Definitions

  • the invention relates to a method for pretreating and providing a sheet-metal part provided with a metallic layer for a subsequent processing step.
  • DE 201 22 563 U1 relates to a workpiece with very high-quality mechanical properties, consisting of one with an intermetallic
  • Alloy compound coated, deep-drawn sheet metal blank which has been produced by cutting a rolled, in particular hot-rolled strip steel sheet, wherein the strip steel sheet is coated with a metal or a metallic alloy, which ensure protection of the surface and the steel, the intermetallic
  • Alloy compound is formed on the surface by the transformation realized by a temperature increase above 700 ° C and ensures protection against corrosion and decarburization of the steel and causes a lubricating function, wherein the metal or metallic alloy in the coating of zinc or an alloy the basis of zinc is.
  • a method and apparatus for maintaining the 'temperature of the metal plates during transportation and treatment breaks is known.
  • the temperature of the stacked continuously cast metal plates is kept at a desired temperature level of more than 1,000 ° C, that the stack of is surrounded by a thermally insulating housing which is surrounded by an induction heating coil
  • DE 699 07 816 T2 discloses a coated hot rolled and
  • the coating is based on aluminum or on an aluminum alloy.
  • the object of the invention is to enable an improved pretreatment and provision of a provided with a metallic layer sheet metal part for subsequent processing, in particular to allow a more flexible and / or shorter cycle times having production of the sheet metal part.
  • the object is in a method for pretreating and providing a metal layer provided with a sheet metal part for a subsequent processing step with annealing of the sheet metal part for a first period of time in a first
  • the subsequent processing step may be, for example, a forming step and / or
  • Hardening step act it is possible to separate the pretreatment or the provision and the subsequent processing step
  • the temporal decoupling can advantageously take place during the waiting of the second period of time. This makes it advantageously possible to make the production of the sheet metal part more flexible.
  • Time period ends when at least 60% of the mass of the metallic layer has been transformed.
  • the first time period ends when at least 80%, 90% or 95% of the mass of the metallic layer has been transformed.
  • the second period lasts at least 1 minute, but may take days or months.
  • shorter cycle times can be realized.
  • a logistic buffering of the sheet metal parts can take place while waiting for the second period of time, for example by storing the same at the ambient temperature.
  • Processing step can take place in the manner of a hardening and / or forming step in any manner, in particular as disclosed in DE 201 22 563 U1.
  • annealing and / or heating and / or keeping warm of the sheet metal part, in particular in the first and / or second temperature range can be done in any manner, for example by means of a furnace, a hot air blower, by means of inductive
  • Sheet metal part lies.
  • the transformation of the metallic layer can first take place in a comparatively small temperature range.
  • the transformation point of the sheet metal part is dependent on its composition, in particular of a carbon content.
  • Temperature range is below a melting temperature of the metallic layer.
  • Transformation of the metallic layer into an alloy-like layer can take place.
  • the first temperature range is slightly above a melting temperature of the metallic layer, without the metallic layer being adversely affected, for example dripping off, whereby the transformation of the metallic layer into an alloy-like layer nevertheless takes place advantageously by means of diffusion can. It is understood that the first temperature range can vary depending on the chemical composition of the metallic layer.
  • Temperature range is above the transformation point.
  • the austenitization of the sheet metal part can take place above the forming temperature.
  • a hot forming process and a curing process by rapid cooling such as quenching and / or a tool cooling done.
  • the first temperature range comprises a temperature value of 873 K to 1,003 K.
  • a particularly good transformation of the metallic layer can be achieved with this value.
  • Temperature range comprises a temperature value of 1,223 K.
  • a particularly good austenitization and / or hot forming of the sheet metal part can take place in this area.
  • a tempering of the sheet metal part in the second temperature range is provided for a third period of time.
  • the austenitization can take place during the third period of time, which can be selected such that it can take place to a sufficient extent.
  • the sheet metal part should consist of one of the alloys 22MnB5, 25CrMo4, 34CrMo4, 42CrMo4, 25CrMoS4, 34CrMoS4 or 42CrMoS4.
  • the steel 22MnB5 should be used advantageously in the following composition, the
  • the metallic layer has a mixture with an aluminum weight fraction of at least 90% and also portions of silicon and iron.
  • a particularly high surface quality, good corrosion protection, a sliding action for the subsequent treatment step and / or a particularly good transformation can be achieved.
  • the first temperature range comprises a temperature value of 1,003 K, since at this value, a particularly good transformation of the metallic layer can be achieved.
  • the object is also achieved in a device for pretreating and providing a metal layer provided with a sheet metal part for a subsequent processing step, which is designed, set up and / or constructed in particular for performing a method described above.
  • the device has an insulation housing for
  • Heat source can be supplied to the sheet metal parts the necessary energy.
  • the sheet metal parts can advantageously be separated from one another and
  • Singling device has a lifting table and a pawl feed.
  • the lifting table By means of the lifting table, the sheet metal parts, in particular in stacked form, the latch feed can be supplied.
  • the pawl feed By means of the pawl feed the separated sheet metal parts can be supplied to the subsequent processing step.
  • the heat source has a field inductor, for example a transverse or longitudinal field inductor for heating the sheet metal part to the first temperature range.
  • Leksfeldinduktors be directed in the longitudinal direction of the sheet metal part field for introducing heat-convertible energy in the sheet metal part.
  • a field running in a transverse direction of the sheet metal part can be built up, by means of which energy convertible into heat energy can be introduced into the sheet metal part.
  • the heat source has a field inductor, for example a transverse or longitudinal field inductor for heating the sheet metal part to the second temperature range.
  • a field inductor for example a transverse or longitudinal field inductor for heating the sheet metal part to the second temperature range.
  • Heat sources can each have one or more effects.
  • Fig. 1 A device for pretreating and providing one with a metallic
  • Fig. 2 is a half-plan view of a Leksfeldinduktor the device shown in Fig. 1.
  • FIG. 1 shows a device 1 for pretreating and providing a sheet-metal part 5 provided with a metallic layer 3 for subsequent processing.
  • the subsequent processing can be carried out by means of a further device, not shown, for example by means of a forming device and / or a device for hardening the sheet metal part. 5
  • a plurality of sheet metal parts 5 is shown, which are in the form of a stack 7 in an interior of an insulating housing 9.
  • the stack 7 can be moved by means of a lifting table 11 in the direction of a double arrow 13 up and down.
  • the device 1 has a separating device 15, by means of which the sheet-metal parts 5 can be singulated.
  • the separating device 15 each of the sheet metal parts 5 can be lifted from the remaining stack 7 so that it can be brought into engagement with a pawl 17 of a pawl feed device 19.
  • Pawl feed device 19 the respective individual sheet metal part 5 can be pushed in the direction of an arrow 21 through an opening of the insulating housing 9.
  • the insulating housing 9 For heating the stack 7 or at least the respectively separated sheet metal part 5 in a first temperature range, the insulating housing 9 has a Lssensfeldinduktor 23.
  • a field can be generated by the sheet metal part 5 in a longitudinal direction, by means of which the necessary energy for heating in the first temperature range in the sheet metal part 5 can be introduced.
  • the longitudinal field inductor 23 can for this purpose have a coil through which a current flows which extends in a circumferential direction around the sheet metal part 5 and / or the stack 7.
  • the sheet metal parts 5 have a metallic layer 3, which preferably has a 90% proportion of aluminum and iron and silicon.
  • the first temperature range is advantageously chosen so that the metallic layer 3 is not melted. It is advantageous to a transformation of the layer 3, in particular by means of diffusion, wherein a
  • Alloy-like outer skin of the sheet metal part 5 is formed.
  • the sheet-metal part 5 tempered by means of the longitudinal field inductor 23 in the first temperature range can be pushed through the opening in the insulating housing 9 after a first period of time has passed by means of the pawl feed device 19.
  • a Querfeldinduktor 25 Adjacent to the opening of the insulating housing 9, a Querfeldinduktor 25 is arranged, which may also have an electrical current-carrying winding for generating a transverse to the sheet metal part 5 extending field.
  • the corresponding sheet metal part 5 can be pushed in a simple manner by means of Kllnkenvorschubvorraum 19 under the Querfeldinduktor 25.
  • a sheet-metal part 5 heated to the second temperature range is shown on a right-hand side of the transverse-field inductor 25 as viewed in the orientation of FIG.
  • the sheet metal part 5, which has been heated to the second temperature range by means of the transverse field inductor 25, can be austenitized by means of an allotropic transformation and is thus prepared for further processing, in particular hardening by means of quenching and / or tempering
  • the first temperature range can have a value between 873 K and 1,003 K.
  • the second temperature range may have a value of 1.223 K.
  • FIG. 2 shows a schematic plan view in a half-side view of the apparatus 1 shown in FIG. 1.
  • a lid of the insulating housing 9 is shown transparent for simplicity, so that the around the respective sheet metal part 5 extending around
  • Longitudinal field inductor 23 is visible. It can be seen that the longitudinal field inductor 23 extends within the insulating housing 3. Alternatively, it is also conceivable that the
  • Longitudinal field inductor 23 is disposed outside of the insulating housing 9.
  • the further device may be, for example, a press for a forming process, for example by means of
  • the further device may for example have a stroke rate of 8 of the sheet metal parts 5 per minute.
  • the stack 7 passes through the longitudinal field inductor 23 and is preferably heated to the value between 873 K and 1,003 K.
  • the diffusion layer is advantageously formed from the metallic layer 3.
  • Separating device 15 separates the sheet metal part 5 and the stacked on the stack 7 boards.
  • the pawl feed device 19 pushes the sheet metal parts 5 out of the insulating housing 9 in the direction of the arrow 21 under the transverse field inductor 25.
  • the Querfeldinduktor 25 heats the corresponding sheet metal part 5 to the value of about 1.223 K.
  • the sheet metal part 5 and the board is inserted into the further device, not shown, which may be, for example, a hot forming tool.
  • the further device which may be, for example, a hot forming tool.
  • the entire stack 7 can be heated, wherein the stack 7 can be sized so large that due to the cycle times of the downstream device for
  • the diffusion time that is, the first period, may be, for example, about 10 minutes.
  • the stack 7 can be slowly heated by means of the Lssensfeldinduktors 23 until it has reached the first temperature range.
  • the longitudinal field inductor 23 can advantageously be designed as a low-frequency inductor.
  • the heating of the sheet metal part to the second temperature range can be done in a short time, advantageously in a short time the corresponding individual sheet metal part 5 a
  • the Querfeldinduktor 25 may be designed as a high-frequency inductor.

Landscapes

  • 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 prétraitement et de préparation d'une pièce de tôle (5) munie d'une couche métallique (3) en vue d'un usinage subséquent. L'invention vise à améliorer le prétraitement et la préparation. A cet effet, une malléabilisation de la pièce de tôle (5) est réalisée pendant la durée d'une première période dans une première plage de températures, la malléabilisation permettant la transformation de la couche métallique (3), et, pendant une seconde période, au moins une des opérations suivantes est mise en œuvre : maintien de la première plage de températures, refroidissement de la pièce de tôle (5), refroidissement de la pièce de tôle (5) à une température ambiante, stockage de la pièce de tôle (5), chauffage de la pièce de tôle (5) dans une seconde plage de températures nécessaire pour l'usinage subséquent.
EP10757037.6A 2009-09-17 2010-09-15 Procédé de prétraitement et de préparation d'une pièce de tôle Not-in-force EP2478121B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009042026A DE102009042026A1 (de) 2009-09-17 2009-09-17 Verfahren zum Vorbehandeln und Bereitstellen eines Blechteils
PCT/EP2010/005647 WO2011032685A1 (fr) 2009-09-17 2010-09-15 Procédé de prétraitement et de préparation d'une pièce de tôle

Publications (2)

Publication Number Publication Date
EP2478121A1 true EP2478121A1 (fr) 2012-07-25
EP2478121B1 EP2478121B1 (fr) 2016-07-06

Family

ID=43402062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10757037.6A Not-in-force EP2478121B1 (fr) 2009-09-17 2010-09-15 Procédé de prétraitement et de préparation d'une pièce de tôle

Country Status (4)

Country Link
EP (1) EP2478121B1 (fr)
CN (1) CN102695809A (fr)
DE (1) DE102009042026A1 (fr)
WO (1) WO2011032685A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011103269A1 (de) * 2011-05-26 2012-11-29 Thyssenkrupp System Engineering Gmbh Glühvorrichtunng und Verfahren zum Glühen von Metallplatten
EP2602334A1 (fr) * 2011-12-08 2013-06-12 Linde Aktiengesellschaft Installation et procédé de déformation à chaud de platines
DE102011120679A1 (de) * 2011-12-08 2013-06-13 Linde Aktiengesellschaft Anlage und Verfahren zum Warmumformen von Platinen
DE102012001742A1 (de) 2012-01-28 2013-08-01 Volkswagen Aktiengesellschaft Vorrichtung zum Erwärmen von Blechwerkstücken für ein nachfolgendes Warmumformen und insbesondere Presshärten
DE102012218159B4 (de) * 2012-10-04 2018-02-08 Ebner Industrieofenbau Gmbh Handhabungseinrichtung
DE102012221152A1 (de) * 2012-11-20 2014-06-05 Thyssenkrupp System Engineering Gmbh System zum Temperieren von Werkstücken
DE102012221154B4 (de) * 2012-11-20 2017-05-11 Thyssenkrupp System Engineering Gmbh System zum Aufwärmen von Werkstücken
US9222729B2 (en) 2012-12-07 2015-12-29 Linde Aktiengesellschaft Plant and method for hot forming blanks
DE102013008853A1 (de) * 2013-05-23 2014-11-27 Linde Aktiengesellschaft Anlage und Verfahren zum Warmumformen von Platinen
DE102014211241A1 (de) * 2014-06-12 2015-12-17 Sms Elotherm Gmbh Verfahren und Erwärmungsanlage für das serienmäßige Erwärmen von Blechplatinen mit Ausbildung unterschiedlicher Temperaturzonen
DE102015016656A1 (de) 2015-12-19 2017-06-22 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Verfahren zur Herstellung eines beschichteten, durch Warmumformung gehärteten Körpers sowie ein nach dem Verfahren hergestellter Körper

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DE3102638A1 (de) 1980-01-29 1981-11-26 Mitsubishi Denki K.K., Tokyo Verfahren und vorrichtung zum aufrechterhalten der temperatur von metallplatten waehrend des transportes und behandlungspausen
FR2780984B1 (fr) 1998-07-09 2001-06-22 Lorraine Laminage Tole d'acier laminee a chaud et a froid revetue et comportant une tres haute resistance apres traitement thermique
FR2807447B1 (fr) 2000-04-07 2002-10-11 Usinor Procede de realisation d'une piece a tres hautes caracteristiques mecaniques, mise en forme par emboutissage, a partir d'une bande de tole d'acier laminee et notamment laminee a chaud et revetue
DE102004007071B4 (de) * 2004-02-13 2006-01-05 Audi Ag Verfahren zur Herstellung eines Bauteils durch Umformen einer Platine und Vorrichtung zur Durchführung des Verfahrens
DE102008006771B3 (de) * 2008-01-30 2009-09-10 Thyssenkrupp Steel Ag Verfahren zur Herstellung eines Bauteils aus einem mit einem Al-Si-Überzug versehenen Stahlprodukt und Zwischenprodukt eines solchen Verfahrens
DE102009019496A1 (de) * 2009-05-04 2010-11-18 Braun, Elisabeth Vorrichtung und Verfahren zur Erwärmung warm umzuformender Werkstücke

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Title
See references of WO2011032685A1 *

Also Published As

Publication number Publication date
DE102009042026A1 (de) 2011-03-24
CN102695809A (zh) 2012-09-26
EP2478121B1 (fr) 2016-07-06
WO2011032685A1 (fr) 2011-03-24

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