EP2012948B1 - Verfahren zum umformen von platinen aus höher- und höchstfesten stählen - Google Patents

Verfahren zum umformen von platinen aus höher- und höchstfesten stählen Download PDF

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Publication number
EP2012948B1
EP2012948B1 EP07728442A EP07728442A EP2012948B1 EP 2012948 B1 EP2012948 B1 EP 2012948B1 EP 07728442 A EP07728442 A EP 07728442A EP 07728442 A EP07728442 A EP 07728442A EP 2012948 B1 EP2012948 B1 EP 2012948B1
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EP
European Patent Office
Prior art keywords
forming
temperature
forming tool
tool
tempered
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.)
Active
Application number
EP07728442A
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German (de)
English (en)
French (fr)
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EP2012948A1 (de
Inventor
Franz-Josef Lenze
Sascha Sikora
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.)
ThyssenKrupp Steel Europe AG
Original Assignee
ThyssenKrupp Steel 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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Priority to PL07728442T priority Critical patent/PL2012948T3/pl
Publication of EP2012948A1 publication Critical patent/EP2012948A1/de
Application granted granted 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
    • C21D1/34—Methods of heating
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • 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
    • B21D22/20—Deep-drawing
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/16—Heating or cooling
    • 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
    • C21D2221/00—Treating localised areas of an article
    • 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
    • C21D2221/02—Edge parts

Definitions

  • the invention relates to a method for press hardening and tempered forming of blanks of higher and / or highest strength steels, in which the blank is heated prior to forming and then hot formed in a forming tool, wherein the forming tool has means for temperature control.
  • a board is first heated. This usually happens in an oven. Subsequently, the heated board is removed from the oven and placed in a forming tool in which the board are hot formed. For example, during press-hardening, the board is heated to at least austenitizing temperature. Subsequently, the board cools rapidly, transforming the austenitic structure of the board into a martensitic structure.
  • a problem with the forming tools known from the prior art is that although they allow a temperature of the forming tool, a precise control of the board temperature during forming can not be done.
  • the object of the present invention is to propose a forming tool for press-hardening and tempered forming as well as a method for press-hardening and tempered forming, which enables a precisely defined temperature control of the blank during the forming process.
  • the temperature zones in the forming tool during the forming uniform or different temperatures.
  • a temperature profile within the board or a constant temperature in the formed areas of the board can thus be set during the forming process.
  • more cost-effective forming tools according to a next further developed embodiment of the method according to the invention can be used in that the temperature of the individual temperature zones in the forming tool does not exceed a maximum temperature of 650 ° C. during forming.
  • inexpensive hot-work tool steels can be used for the production of the forming tool.
  • the microstructure of the press-hardened board in this temperature zone can be adjusted to an improved elongation at break under reduced values with respect to the yield strength and tensile strength.
  • the reason for this is considered to be that the fluctuation of the cooling rates is reduced despite higher surface pressures at higher tool temperatures.
  • the temperature of at least one temperature zone in the forming tool does not exceed 200 ° C., maximum yield strengths and tensile strengths are achieved in this area with a reduced elongation at break.
  • Another parameter for influencing the structure of the board during forming can be provided by the fact that the cooling behavior of the board is at least partially adjusted via the surface pressures of the forming tool. Especially in areas of low temperatures in the forming tool, ie in areas with a temperature below 200 ° C, a variation of the surface pressure leads to significantly different cooling rates, so that the structure of the board is variable in particular in these temperature zones on the surface pressure.
  • Particularly high mechanical strength values can be achieved with the method according to the invention by using, for example, a manganese-boron steel, in particular an alloy type 22MnB5 manganese-boron steel.
  • Tensile strengths of greater than 1500 MPa and yield strengths of more than 1000 MPa can be achieved with the steel type mentioned, the elongation at break A80 being approximately 5%.
  • the boards according to the invention have a surface coating for protection against oxide formation.
  • a corresponding oxide protection of the surfaces of the board can be provided by an aluminum-silicon coating.
  • a microstructure with the method according to the invention can be adjusted in a targeted manner, that a temperature difference between the heated board and the contact surfaces of the tempered tool between 50 and 650 ° C, preferably from 100 to 350 ° C is set.
  • the temperature of the board is understood here as the core temperature of the board.
  • a temperature difference of 50 ° C to 650 ° C almost all microstructures can be generated during forming, for example, a ferritic matrix with low temperature differences at 50 ° C.
  • essentially bainitic microstructures are produced by the forming in the board, which have a positive effect on the elongation behavior of the formed board.
  • the martensitic microstructure portion is substantially increased, which increases the strength, but reduces the elongation capacity of the formed board.
  • the single FIGURE shows a perspective sectional view of an embodiment of a forming tool for press hardening and tempered forming a board of higher and / or higher strength steels.
  • the illustrated in the single figure embodiment of a forming tool for press hardening and tempered forming has first as Umformwerkmaschinemaschinemaschine a drawing ring 1, a stamp 2 and a blank holder 3.
  • heating wires 5 are arranged, which temper the drawing ring 1 as the first temperature zone.
  • the stamp 2 has a heating coil 6, so that its temperature can also be regulated.
  • the receptacle 7 of the sheet metal holder comprises heating wires 8, which temper the sheet metal holder 3.
  • the individual temperature zones which are formed from the contact surfaces of the drawing ring 1, the punch 2 and the sheet holder 3 with the board and the individual heating wires are insulated by insulating material 9 against heat losses, for example in the tool holder 13.
  • the individual forming tool elements 1, 2, 3, which form the individual temperature zones are not thermally insulated from one another.
  • the thermocouples 10, 11, 12 in the immediate vicinity of the contact surfaces of Umformtechnikmaschinemaschinence 1, 2, 3 ensures with the board that an accurate temperature of the corresponding areas of the board can be achieved.
  • the drawing ring 1 and the blank holder 3 and the punch 2 with respect to the tool holder is thermally insulated, so that an uncontrolled heat flow into the tool holder 13 is prevented.
  • the three temperature zones of the drawing ring 1, the punch 2 and the sheet metal age 3 can be independently set to different temperatures from room temperature to, for example, a maximum of 650 ° C, preferably 200 to 650 ° C, especially 400 ° C to 650 ° C.
  • temperature profiles in the forming tool can thus also be generated in order to be able to respond to corresponding Make the deformed board a structural change, for example, due to different cooling rates of the board in these areas, bring about.
  • means for varying the surface pressure and the means for controlling the individual heating wires of the temperature zones are not shown in the single figure.
  • forming tool temperatures of, for example, 400 ° C to 650 ° C are preferred.
  • the microstructure consists only of martensite and maximum strength with reduced elongation at break is achieved.
  • Sample a) was converted into a tool tempered to 410 ° C. with a pressure of 80 bar and sample b) in a tool cooled to room temperature with a pressure of 80 bar.
  • Sample a) had a texture of bainite with tempering effects.
  • sample b) a martensitic, bainitic microstructure was detectable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Tires In General (AREA)
  • Forging (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatment Of Steel (AREA)
EP07728442A 2006-04-24 2007-04-24 Verfahren zum umformen von platinen aus höher- und höchstfesten stählen Active EP2012948B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07728442T PL2012948T3 (pl) 2006-04-24 2007-04-24 Sposób obróbki plastycznej wykrojów z blachy ze stali o podwyższonej i najwyższej wytrzymałości

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006019395A DE102006019395A1 (de) 2006-04-24 2006-04-24 Vorrichtung und Verfahren zum Umformen von Platinen aus höher- und höchstfesten Stählen
PCT/EP2007/053986 WO2007122230A1 (de) 2006-04-24 2007-04-24 Vorrichtung und verfahren zum umformen von platinen aus höher- und höchstfesten stählen

Publications (2)

Publication Number Publication Date
EP2012948A1 EP2012948A1 (de) 2009-01-14
EP2012948B1 true EP2012948B1 (de) 2009-09-09

Family

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EP07728442A Active EP2012948B1 (de) 2006-04-24 2007-04-24 Verfahren zum umformen von platinen aus höher- und höchstfesten stählen

Country Status (12)

Country Link
US (1) US9068239B2 (es)
EP (1) EP2012948B1 (es)
JP (1) JP5270535B2 (es)
AT (1) ATE442213T1 (es)
BR (1) BRPI0710175A2 (es)
CA (1) CA2649519C (es)
DE (2) DE102006019395A1 (es)
ES (1) ES2333274T3 (es)
MX (1) MX2008013630A (es)
PL (1) PL2012948T3 (es)
PT (1) PT2012948E (es)
WO (1) WO2007122230A1 (es)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012104734A1 (de) * 2012-05-31 2013-12-05 Outokumpu Nirosta Gmbh Verfahren und Vorrichtung zur Herstellung von umgeformten Blechteilen bei Tieftemperatur
US9340233B2 (en) 2010-10-15 2016-05-17 Benteler Automobiltechnik Gmbh Method for producing a hot-formed and press-hardened metal component
CN112371820A (zh) * 2020-10-26 2021-02-19 苏州加益不锈钢制品有限公司 渐进式锅体自动拉伸工艺及其生产装置

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FR2927828B1 (fr) * 2008-02-26 2011-02-18 Thyssenkrupp Sofedit Procede de formage a partir de flan en materiau trempant avec refroidissement differentiel
DE102008022401B4 (de) * 2008-05-06 2012-12-06 Thyssenkrupp Steel Europe Ag Verfahren zum Herstellen eines Stahlformteils mit einem überwiegend bainitischen Gefüge
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DE102008022400B4 (de) * 2008-05-06 2013-08-01 Thyssenkrupp Steel Europe Ag Verfahren zum Herstellen eines Stahlformteils mit einem überwiegend martensitischen Gefüge
DE102008055514A1 (de) 2008-12-12 2010-06-17 Thyssenkrupp Steel Europe Ag Verfahren zur Herstellung eines Bauteils mit verbesserten Bruchdehnungseigenschaften
KR101159897B1 (ko) * 2009-03-26 2012-06-26 현대제철 주식회사 프레스 경화용 금형의 냉각장치 및 이를 이용한 자동차 부품의 제조방법
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DE102011102167A1 (de) * 2011-05-21 2012-11-22 Volkswagen Aktiengesellschaft Verfahren zur Herstellung eines Formbauteils mit mindestens zwei Gefügebereichen unterschiedlicher Duktilität und Erwärmungseinrichtung
DE102011108912A1 (de) * 2011-07-28 2013-01-31 Volkswagen Aktiengesellschaft Segmentiertes Presshärtewerkzeug
DE102011111212B4 (de) * 2011-08-20 2014-04-24 Audi Ag Umformwerkzeug zur Herstellung von pressgehärteten Blechbauteilen
US20130105046A1 (en) * 2011-10-27 2013-05-02 GM Global Technology Operations LLC System and method for generating a welded assembly
DE102011055643A1 (de) * 2011-11-23 2013-05-23 Thyssenkrupp Steel Europe Ag Verfahren und Umformwerkzeug zum Warmumformen und Presshärten von Werkstücken aus Stahlblech, insbesondere verzinkten Werkstücken aus Stahlblech
EP2664682A1 (de) 2012-05-16 2013-11-20 ThyssenKrupp Steel Europe AG Stahl für die Herstellung eines Stahlbauteils, daraus bestehendes Stahlflachprodukt, daraus hergestelltes Bauteil und Verfahren zu dessen Herstellung
DE202012006529U1 (de) * 2012-07-09 2012-11-07 Steinhoff & Braun's Gmbh Halte- und Transportvorrichtung
DE102013004034B4 (de) * 2013-03-08 2021-03-25 Volkswagen Aktiengesellschaft Formwerkzeug zum Warmumformen und/oder Presshärten mit wenigstens einem Schneidstempel zum Erzeugen einer Ausnehmung im noch warmen Blechmaterial
DE102013108046A1 (de) * 2013-07-26 2015-01-29 Thyssenkrupp Steel Europe Ag Verfahren und Vorrichtung zum partiellen Härten von Halbzeugen
DE102014108901B3 (de) * 2014-06-25 2015-10-01 Thyssenkrupp Ag Verfahren und Umformwerkzeug zum Warmumformen sowie entsprechendes Werkstück
DE102015115049B4 (de) 2015-09-08 2018-04-26 Thyssenkrupp Ag Verfahren und Vorrichtung zum Einstellen einer mechanischen Eigenschaft eines Werkstücks aus Stahl
DE102016202381B4 (de) * 2016-02-17 2022-08-18 Thyssenkrupp Ag Fahrzeugrad
DE102016123496A1 (de) * 2016-12-05 2018-06-07 Schuler Pressen Gmbh Werkzeug zum Gießen und/oder Umformen eines Formteils, Gießvorrichtung, Presse und Verfahren zum Kompensieren einer thermischen Belastung eines Formteils
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EP4337051A1 (en) * 2021-05-12 2024-03-20 Galvion Incorporated System for forming a deep drawn helmet and method therefor
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Publication number Priority date Publication date Assignee Title
US9340233B2 (en) 2010-10-15 2016-05-17 Benteler Automobiltechnik Gmbh Method for producing a hot-formed and press-hardened metal component
DE102010048209C5 (de) * 2010-10-15 2016-05-25 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines warmumgeformten pressgehärteten Metallbauteils
DE102012104734A1 (de) * 2012-05-31 2013-12-05 Outokumpu Nirosta Gmbh Verfahren und Vorrichtung zur Herstellung von umgeformten Blechteilen bei Tieftemperatur
US10532395B2 (en) 2012-05-31 2020-01-14 Thyssenkrupp Steel Europe Ag Method and device for producing shaped sheet metal parts at a low temperature
CN112371820A (zh) * 2020-10-26 2021-02-19 苏州加益不锈钢制品有限公司 渐进式锅体自动拉伸工艺及其生产装置
CN112371820B (zh) * 2020-10-26 2023-02-17 苏州加益不锈钢制品有限公司 渐进式锅体自动拉伸工艺及其生产装置

Also Published As

Publication number Publication date
CA2649519C (en) 2014-05-20
JP5270535B2 (ja) 2013-08-21
MX2008013630A (es) 2008-11-10
EP2012948A1 (de) 2009-01-14
DE102006019395A1 (de) 2007-10-25
US20090178740A1 (en) 2009-07-16
BRPI0710175A2 (pt) 2011-08-16
DE502007001501D1 (de) 2009-10-22
WO2007122230A1 (de) 2007-11-01
PT2012948E (pt) 2009-12-10
ES2333274T3 (es) 2010-02-18
JP2009534196A (ja) 2009-09-24
PL2012948T3 (pl) 2010-05-31
US9068239B2 (en) 2015-06-30
CA2649519A1 (en) 2007-11-01
ATE442213T1 (de) 2009-09-15

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