EP2415882A1 - Procédé de fabrication d'une pièce de formage en tôle à partir d'un alliage en aluminium non durcissable durci par laminage - Google Patents

Procédé de fabrication d'une pièce de formage en tôle à partir d'un alliage en aluminium non durcissable durci par laminage Download PDF

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Publication number
EP2415882A1
EP2415882A1 EP10008040A EP10008040A EP2415882A1 EP 2415882 A1 EP2415882 A1 EP 2415882A1 EP 10008040 A EP10008040 A EP 10008040A EP 10008040 A EP10008040 A EP 10008040A EP 2415882 A1 EP2415882 A1 EP 2415882A1
Authority
EP
European Patent Office
Prior art keywords
sheet
heated
forming
temperature
seconds
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
EP10008040A
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German (de)
English (en)
Other versions
EP2415882B1 (fr
Inventor
Holger Diersmann
Jochen Dörr
Jochem Grewe
Andreas Hitz
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
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Benteler Automobiltechnik GmbH
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Publication date
Application filed by Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Priority to EP10008040.7A priority Critical patent/EP2415882B1/fr
Publication of EP2415882A1 publication Critical patent/EP2415882A1/fr
Application granted granted Critical
Publication of EP2415882B1 publication Critical patent/EP2415882B1/fr
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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
    • 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
    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent

Definitions

  • the invention relates to a method for producing a sheet metal part from a non-hardenable aluminum alloy.
  • Non-hardenable aluminum alloys are usually characterized by very good corrosion resistance. In addition, they are often used in non-highly stressed components, but without focusing on special lightweight construction.
  • the invention is therefore based on the object to show a way, such as sheet metal, consisting of hard, non-hardenable aluminum alloys, forming a complex component high strength can be produced.
  • An essential step of the invention is that the temperature range to which the sheet is heated, between 200 ° C and 400 ° C, in particular less than 370 ° C, and the heating and prespecific production of the component takes place within a period of 1 to 60 seconds, after which the heated sheet is placed in a forming tool of a forming press and formed into the sheet metal part.
  • the cooling of the sheet to a temperature less than 200 ° C within 60 seconds after heating, preferably by forming in a tool whose temperature is less than 200 ° C to 300 ° C, or cooling in a device after the forming under 200 ° C to 300 ° C.
  • the heated sheet is placed in a cold forming tool, wherein a cold forming an unheated or not externally heated forming tool is to be understood.
  • an active cooling of the formed sheet In the context of the invention preferably takes place an active cooling of the formed sheet. Basically, however, a passive cooling is conceivable in which the sheet or the shaped sheet metal part of the forming press removed and cools without additional cooling measures under ambient conditions.
  • the method according to the invention with increasing heating and holding time brings about a slight loss of strength in the case of the temperatures required for forming, so that as short overall times as possible according to the invention are to be aimed at.
  • the sheet Since for handling after heating and pressing of the sheets certain cycle times are technically hardly, or only with uneconomical effort to fall below, as fast as possible heating offers the best opportunities to produce components with a strength close to that of the starting sheet.
  • the sheet must be heated to a temperature of at least 200 ° C and at most 400 ° C, preferably 250 ° C to 370 ° C, in particular 270 ° C to 300 ° C.
  • the associated heating times for the process according to the invention are from 1 to 60 seconds, and thus significantly lower than those which are possible with a conventional furnace heating to the temperatures mentioned.
  • the heating can therefore preferably be resistive, conductive, inductive or capacitive.
  • the heating period, as described above, is preferably shorter and should be less than 45 seconds, in particular for temperatures above 250 ° C below 30 seconds.
  • the sheet is - as stated - heated in a period of 1 to 30 seconds and molded in no more than 60 seconds and cooled at least locally below 260 ° C.
  • the European Standard EN515 specifies how to describe basic conditions of aluminum semi-finished products.
  • the letter H means work-hardened. This designation applies to products that are used to ensure the specified mechanical properties after annealing (or after hot working) are subjected to cold working or a combination of cold working and recovery annealing or stabilization.
  • the letter H is followed by two digits, the first to indicate the type of thermal treatment, the second to indicate the degree of work hardening.
  • Cold forming is understood to mean the plastic deformation of a metal at a temperature and velocity which leads to work hardening.
  • Work hardening is the change of the metal structure by cold working, which leads to increased strength and hardness, whereby the moldability decreases.
  • H1x stands for work-hardened products which are work-hardened to obtain the desired strength without additional thermal treatment.
  • the status designation H2x means work-hardened and re-annealed. This applies to products which are work-hardened beyond the desired final strength and then softened to the desired strength by annealing.
  • H3x means work-hardened and stabilized and applies to work-hardened products whose mechanical properties are stabilized by thermal treatment at low temperature or by heating during processing. Stabilizing generally improves the formability. This designation applies only to alloys that solidify without stabilization by storage at room temperature.
  • the second digit after the H indicates the final degree of work hardening characterized by the minimum values of tensile strength.
  • the number 8 is assigned to the hardest conditions that are commonly produced.
  • the number 9 denotes states whose minimum tensile strength is 10 MPa or more above the H8x states.
  • the numbers 2, 4 and 6 denote intermediate states.
  • H12 means work-hardened-1/4 hard, H14 work hardened-1/2 hard, H16 work hardened-3/4 hard and H18 work hardened-4/4 hard (fully through hardened).
  • work hardened and re-annealed materials are categorized under conditions H22 / 24/26/28, or work hardened and stabilized materials for H32 / 34/36/38. Overall, therefore, sheets are to be used, which are hard-rolling and thus have undergone work hardening by rolling.
  • the advantage of the invention is that a relatively complex component can be produced from a roll-hard, non-hardenable aluminum alloy which has a high strength completely or in some areas.
  • the special feature is that the areas of high strength are not dependent on the deformation and the introduced degrees of deformation. This results in an alternative production path compared to thermosetting alloys, which entail high production costs due to significantly higher semi-finished product costs and a heat treatment of the component lasting up to 24 hours.
  • An open sheet metal part in the sense of this invention is a component produced from a sheet metal blank, that is to say from a substantially flat initial state.
  • the starting material has been work hardened by rolling to a certain target value.
  • An open sheet metal part according to the invention does not mean hollow profile.
  • the hard-rolling, non-hardenable aluminum sheet should preferably be completely heated and reshaped. It is also conceivable, however, a partial hot forming by the sheet is heated in regions to different temperatures before forming. It is also conceivable that the sheet has areas that have been heated for different lengths, either to achieve different target temperatures or to influence the local deformation properties of the sheet or the target strengths by the heating time.
  • the sheet can preferably be heated resistively, conductively, inductively or capacitively.
  • Parts of the sheet or the sheet metal part can be kept after the forming in a device further to temperature or heated.
  • the aim is to create a generally improved compared to a completely hard component component that has more favorable properties, in particular with regard to the deformation behavior in an accident, be it in terms of energy consumption or in terms of weight savings.
  • the forming tool can have a mold cavity with at least one region which is heated.
  • heated points in the tool and cooled areas can be provided.
  • the heated areas in the forming tool allow the workpiece to be held at a higher temperature within an additional period of time by first heating a certain area for a longer period of time.
  • a multi-stage forming mold cavities may be provided in other tool stages, which are partially heated.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP10008040.7A 2010-08-02 2010-08-02 Procédé de fabrication d'une pièce de formage en tôle à partir d'un alliage en aluminium non durcissable durci par laminage Not-in-force EP2415882B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10008040.7A EP2415882B1 (fr) 2010-08-02 2010-08-02 Procédé de fabrication d'une pièce de formage en tôle à partir d'un alliage en aluminium non durcissable durci par laminage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10008040.7A EP2415882B1 (fr) 2010-08-02 2010-08-02 Procédé de fabrication d'une pièce de formage en tôle à partir d'un alliage en aluminium non durcissable durci par laminage

Publications (2)

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EP2415882A1 true EP2415882A1 (fr) 2012-02-08
EP2415882B1 EP2415882B1 (fr) 2016-03-23

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EP10008040.7A Not-in-force EP2415882B1 (fr) 2010-08-02 2010-08-02 Procédé de fabrication d'une pièce de formage en tôle à partir d'un alliage en aluminium non durcissable durci par laminage

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2518173A1 (fr) * 2011-04-26 2012-10-31 Benteler Automobiltechnik GmbH Procédé de fabrication d'un composant de structure en tôle ainsi que composant de structure en tôle
DE102014108111A1 (de) * 2014-04-10 2015-10-15 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Kraftfahrzeugbauteils aus Aluminium
EP2955237A1 (fr) * 2014-06-10 2015-12-16 Benteler Automobiltechnik GmbH Procédé de fabrication d'un élément de véhicule automobile en aluminium
WO2019016394A1 (fr) * 2017-07-21 2019-01-24 Leiber Group Gmbh & Co. Kg Procédé de forgeage, notamment procédé de forgeage d'un alliage de construction légère, et presse à forger
EP2963140B1 (fr) * 2014-06-10 2019-06-12 Benteler Automobiltechnik GmbH Procédé de fabrication d'un élément de véhicule automobile en aluminium
US10391535B2 (en) * 2013-07-12 2019-08-27 Magna International Inc. Process for forming aluminum alloy parts with tailored mechanical properties
WO2020010306A1 (fr) * 2018-07-06 2020-01-09 Novelis Inc. Traitement thermique non uniforme destiné à une résistance et à une formabilité spatiales personnalisées
CN114602994A (zh) * 2020-12-09 2022-06-10 上海新闵重型锻造有限公司 一种冷作硬化不锈钢棒材的制备方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2950379A1 (de) * 1978-12-14 1980-06-26 Franco Belge Laminoirs Verfahren zur behandlung von ausscheidungshaertbaren nichteisenlegierungen
DE602004009545T2 (de) * 2003-02-26 2008-08-07 Alcan Rhenalu Verfahren zum tiefziehen von teilen aus al-mg-legierungen unter warmer temperatur
JP2009012041A (ja) * 2007-07-05 2009-01-22 Sumitomo Light Metal Ind Ltd 温間成形加工方法と該温間成形加工方法により製造される成形加工品

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009123538A1 (fr) * 2008-04-03 2009-10-08 Gestam Hardtech Ab Procédé de fabrication d'un produit métallique en feuillets formé sous presse
DE102009008282A1 (de) * 2009-02-10 2010-08-19 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Blechformteils aus einer walzharten, nicht aushärtbaren Aluminiumlegierung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2950379A1 (de) * 1978-12-14 1980-06-26 Franco Belge Laminoirs Verfahren zur behandlung von ausscheidungshaertbaren nichteisenlegierungen
DE602004009545T2 (de) * 2003-02-26 2008-08-07 Alcan Rhenalu Verfahren zum tiefziehen von teilen aus al-mg-legierungen unter warmer temperatur
JP2009012041A (ja) * 2007-07-05 2009-01-22 Sumitomo Light Metal Ind Ltd 温間成形加工方法と該温間成形加工方法により製造される成形加工品

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10501829B2 (en) 2011-04-26 2019-12-10 Benteler Automobiltechnik Gmbh Method for producing a structural sheet metal component, and a structural sheet metal component
EP2518173A1 (fr) * 2011-04-26 2012-10-31 Benteler Automobiltechnik GmbH Procédé de fabrication d'un composant de structure en tôle ainsi que composant de structure en tôle
US10391535B2 (en) * 2013-07-12 2019-08-27 Magna International Inc. Process for forming aluminum alloy parts with tailored mechanical properties
DE102014108111A1 (de) * 2014-04-10 2015-10-15 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Kraftfahrzeugbauteils aus Aluminium
US9914491B2 (en) 2014-04-10 2018-03-13 Benteler Automobiltechnik Gmbh Method for producing a motor vehicle component from aluminum
EP2955237A1 (fr) * 2014-06-10 2015-12-16 Benteler Automobiltechnik GmbH Procédé de fabrication d'un élément de véhicule automobile en aluminium
CN105268843A (zh) * 2014-06-10 2016-01-27 本特勒尔汽车技术有限公司 用于制造由铝合金制成的机动车部件的方法
US9821859B2 (en) 2014-06-10 2017-11-21 Benteler Automobiltechnik Gmbh Method for producing a motor vehicle component from aluminum
CN105268843B (zh) * 2014-06-10 2018-06-05 本特勒尔汽车技术有限公司 用于制造由铝合金制成的机动车部件的方法
EP3342883A1 (fr) * 2014-06-10 2018-07-04 Benteler Automobiltechnik GmbH Procédé de fabrication d'un élément de véhicule automobile en aluminium
EP2963140B1 (fr) * 2014-06-10 2019-06-12 Benteler Automobiltechnik GmbH Procédé de fabrication d'un élément de véhicule automobile en aluminium
WO2019016394A1 (fr) * 2017-07-21 2019-01-24 Leiber Group Gmbh & Co. Kg Procédé de forgeage, notamment procédé de forgeage d'un alliage de construction légère, et presse à forger
WO2020010306A1 (fr) * 2018-07-06 2020-01-09 Novelis Inc. Traitement thermique non uniforme destiné à une résistance et à une formabilité spatiales personnalisées
CN112368403A (zh) * 2018-07-06 2021-02-12 诺维尔里斯公司 用于定制空间强度和可成形性的非均匀热处理
CN114602994A (zh) * 2020-12-09 2022-06-10 上海新闵重型锻造有限公司 一种冷作硬化不锈钢棒材的制备方法
CN114602994B (zh) * 2020-12-09 2024-05-31 上海新闵新能源科技股份有限公司 一种冷作硬化不锈钢棒材的制备方法

Also Published As

Publication number Publication date
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