EP1490187B1 - Verfahren zur herstellung eines ultrahochzugfesten reckgeformten oder reckgebogenen blechprodukts aus stahl - Google Patents

Verfahren zur herstellung eines ultrahochzugfesten reckgeformten oder reckgebogenen blechprodukts aus stahl Download PDF

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Publication number
EP1490187B1
EP1490187B1 EP03708789A EP03708789A EP1490187B1 EP 1490187 B1 EP1490187 B1 EP 1490187B1 EP 03708789 A EP03708789 A EP 03708789A EP 03708789 A EP03708789 A EP 03708789A EP 1490187 B1 EP1490187 B1 EP 1490187B1
Authority
EP
European Patent Office
Prior art keywords
yield point
work piece
stretch
partially
temperature
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.)
Expired - Lifetime
Application number
EP03708789A
Other languages
English (en)
French (fr)
Other versions
EP1490187A1 (de
Inventor
Leif Carlsson
Hans Groth
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.)
Outokumpu Oyj
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Outokumpu Oyj
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 Outokumpu Oyj filed Critical Outokumpu Oyj
Priority to SI200331949T priority Critical patent/SI1490187T1/sl
Publication of EP1490187A1 publication Critical patent/EP1490187A1/de
Application granted granted Critical
Publication of EP1490187B1 publication Critical patent/EP1490187B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • 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
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/04—Hardening by cooling below 0 degrees Celsius

Definitions

  • the present invention relates to a method for manufacturing an ultra-high-tensile stretch formed or stretch bent sheet product of steel.
  • Furher, US6162308 describes a process for producing a cold-rolled sheet strip made from carbon steel, lacking chromium content.
  • the object of the present invention is to provide a method for manufacturing an ultra-high-tensile stretch formed or stretch bent product of steel, that has initially been alloyed with chromium, nickel and carbon in predetermined proportions.
  • the features of the invention are set forth in claim 1.
  • a deformation hardening can be abstracted in that the work piece and/or the tool is allowed to keep a higher temperature.
  • the stretch formed or stretch bent sheet product manufactured according to the invention is constituted of a work piece of iron, which as been alloyed with chromium, nickel and carbon in predetermined proportions.
  • the iron has been alloyed with 17% Cr, 7% Ni and 0,1% C or alloys closely related to these and the temperature of the work piece before and/or during the manufacturing operation has been kept or is kept at a controlled level, whereby a strong but controlled deformation hardening is achieved during the stretch forming or stretch bending operation when a plastic cold working of the work piece takes place in combination with maintaining a good ductility of the alloy.
  • the temperature of the finally formed stretch formed or stretch bent sheet product can be controlled directly after the working operation itself.
  • the alloyed metal work piece, that forms the initially work piece according to the invention can be formed or plastically cold worked in traditional machines but using modified tools for stretch forming or stretch bending in order to increase its yield point from an original, low yield point about 300 MPa to a final product that completely or partially obtains a yield point on more than 700 MPa.
  • the method functions also in the case you start from for example a medium high yield point i.e. 700 MPa up to a higher i.e. 1000 MPa or higher.
  • a stronger deformation hardening is obtained during all examples described above if the operation of forming or bending is made in two or several steps.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Steel (AREA)
  • Heat Treatment Of Sheet Steel (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (7)

  1. Verfahren zum Herstellen eines ultrahochzugfesten Blechprodukts aus Stahl, bei dem das anfängliche verwendete Werkstück aus einem Metallwerkstück aus Eisen besteht, legiert mit 17 % Chrom, 7 % Nickel und 0,1 % Kohlenstoff oder Legierungen, die nah mit diesen verwandt sind, wobei das anfängliche Werkstück ganz oder teilweise durch Reckformen oder Reckbiegen bei einer vorbestimmten Temperatur und/oder einem Verformungsmaß plastisch kalt bearbeitet wird, das die Streckgrenze des Endprodukts bestimmt und dafür bestimmend ist, indem es eine starke Verformungshärtung bereitstellt, die dem Endprodukt eine insgesamt oder teilweise um das Vielfache erhöhte Festigkeit oder, im Vergleich zur Streckgrenze des anfänglichen Werkstücks, eine höhere Streckgrenze verleiht, wobei die ursprüngliche niedrige Streckgrenze ungefähr 300 MPa und die höhere Streckgrenze mehr als 700 MPa beträgt oder die ursprüngliche, mittelhohe Streckgrenze bei ungefähr 700 MPa und das höhere Niveau gleichzeitig bei ungefähr 1000 MPa oder höher liegt, wenn die Temperatur, auf die das Werkstück vollständig oder teilweise abgekühlt worden ist, oder die Temperatur, die ganz oder teilweise während der Formungsoperation -196° <= T < = 70 °C beträgt, indem es eine gesteuerte, zunehmende Festigkeit erhält, unabhängig vom Maß der Verformung.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass das legierte Werkstück in herkömmlichen Maschinen zum Reckformen oder Reckbiegen gebildet wird, aber mithilfe eines modifizierten Werkzeugs, um eine angepasste Verformung des Metallwerkstücks zu haben, um seine Streckgrenze von einer ursprünglich niedrigen Streckgrenze zu einem Endprodukt zu erhöhen, das vollständig oder teilweise eine hohe Streckgrenze erhält.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das legierte Werkstück in herkömmlichen Maschinen zum Reckformen oder Reckbiegen gebildet wird, das mithilfe eines modifizierten, teilweise temperaturgesteuerten Werkzeugs, um eine angepasste Temperatur in Bezug auf die Verformung zu erhalten, die während der Reckform- oder Reckbiege-Operation auftritt, um seine Streckgrenze von einer ursprünglich niedrigen Streckgrenze zu einem Endprodukt zu erhöhen, das ganz oder teilweise eine hohe Streckgrenze erhält.
  4. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das Reckformen oder Reckbiegen in zwei oder mehreren Schritten ausgeführt wird, wobei eine stärkere Verformungshärtung erzielt wird.
  5. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das anfängliche Werkstück ganz oder teilweise abgekühlt wird oder vor und während der Formgebungsoperation bei einer gesteuerten Temperatur gehalten wird, um eine gesteuerte, hohe Festigkeit unabhängig vom Maße der Verformung während der Formgebungsoperation zu erhalten.
  6. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das endgültige Blechprodukt ganz oder teilweise abgekühlt wird oder bei einer gesteuerten Temperatur gehalten wird, wobei eine gesteuerte Festigkeit erhalten wird, die unabhängig von dem Maß der Verformung während der Formgebungsoperation zunimmt.
  7. Verfahren nach Anspruch 6, dadurch gekennzeichnet, dass die Temperatur, auf die das Endprodukt vollständig oder teilweise abgekühlt wird, oder die Temperatur, die nach der Formgebungsoperation beibehalten wird, -196° <= T < 70 °C beträgt.
EP03708789A 2002-03-13 2003-03-13 Verfahren zur herstellung eines ultrahochzugfesten reckgeformten oder reckgebogenen blechprodukts aus stahl Expired - Lifetime EP1490187B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200331949T SI1490187T1 (sl) 2002-03-13 2003-03-13 Postopek za izdelavo produkta iz jeklene pločevine, ultra visoke trdnosti, oblikovan z nateznim preoblikovanjem ali ukrivljanjem

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE0200764A SE526120C2 (sv) 2002-03-13 2002-03-13 Förfarande för tillverkning av en ultrahöghållfast sträckpressad eller sträckbockad produkt av stål
SE0200764 2002-03-13
PCT/SE2003/000422 WO2003076100A1 (en) 2002-03-13 2003-03-13 A method for manufacturing an ultra-high-tensile, stretch formed or stretch bent sheet metal product of steel

Publications (2)

Publication Number Publication Date
EP1490187A1 EP1490187A1 (de) 2004-12-29
EP1490187B1 true EP1490187B1 (de) 2010-12-29

Family

ID=20287257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03708789A Expired - Lifetime EP1490187B1 (de) 2002-03-13 2003-03-13 Verfahren zur herstellung eines ultrahochzugfesten reckgeformten oder reckgebogenen blechprodukts aus stahl

Country Status (10)

Country Link
US (1) US20050211347A1 (de)
EP (1) EP1490187B1 (de)
AT (1) ATE493214T1 (de)
AU (1) AU2003212760A1 (de)
DE (1) DE60335529D1 (de)
ES (1) ES2358982T3 (de)
PT (1) PT1490187E (de)
SE (1) SE526120C2 (de)
SI (1) SI1490187T1 (de)
WO (1) WO2003076100A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0501596L (sv) * 2005-07-08 2006-05-02 Marketing X Förfarande och anordning för tillverkning av detaljer som uppvisar kuggar
DE102011082850A1 (de) 2011-09-16 2013-03-21 Siemens Aktiengesellschaft Verdichterschaufel und Verfahren zu ihrer Herstellung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871925A (en) * 1972-11-29 1975-03-18 Brunswick Corp Method of conditioning 18{14 8 stainless steel
DE19622164C1 (de) 1996-06-01 1997-05-07 Thyssen Stahl Ag Verfahren zur Erzeugung eines kaltgewalzten Stahlbleches oder -bandes mit guter Umformbarkeit

Also Published As

Publication number Publication date
PT1490187E (pt) 2011-03-14
SE526120C2 (sv) 2005-07-05
ES2358982T3 (es) 2011-05-17
US20050211347A1 (en) 2005-09-29
SE0200764L (sv) 2003-09-14
WO2003076100A1 (en) 2003-09-18
SE0200764D0 (sv) 2002-03-13
DE60335529D1 (de) 2011-02-10
SI1490187T1 (sl) 2011-04-29
EP1490187A1 (de) 2004-12-29
AU2003212760A1 (en) 2003-09-22
ATE493214T1 (de) 2011-01-15

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