EP 2090668 A1 20090819 - Method of producing a high strength steel and high strength steel produced thereby
Title (en)
Method of producing a high strength steel and high strength steel produced thereby
Title (de)
Verfahren zur Herstellung eines hochfesten Stahls und dadurch gewonnener hochfester Stahl
Title (fr)
Procédé pour la production d'un acier haute résistance et acier haute résistance fabriqué selon ce procédé
Publication
Application
Priority
EP 08101118 A 20080130
Abstract (en)
This invention relates to a process for producing a high strength steel product, wherein the product is produced from a hot-rolled and/or cold-rolled and annealed TWIP steel and having an initial ratio of yield strength and tensile strength, R i , and wherein a part of the TWIP steel is subsequently subjected to a cold reduction which is chosen such that the desired ratio of yield strength and tensile strength, R d , in the part is obtained. The invention also relates to a process for producing a tailor-rolled blank and to such a blank.
IPC 8 full level
C21D 7/02 (2006.01); C22C 38/38 (2006.01)
CPC (source: EP)
C21D 6/001 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 8/0415 (2013.01); C21D 8/0426 (2013.01); C21D 8/0436 (2013.01); C21D 9/48 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/38 (2013.01); C22C 38/58 (2013.01); C21D 2211/001 (2013.01)
Citation (search report)
- [X] US 2006179638 A1 20060817 - ENGL BERNHARD [DE], et al
- [X] WO 2006082104 A1 20060810 - CORUS STAAL BV [NL], et al
- [X] US 2003145911 A1 20030807 - HOFFMANN HARALD [DE], et al
- [A] EP 1698410 A1 20060906 - CORUS STAAL BV [NL]
- [A] EP 1738998 A1 20070103 - CORUS UK LTD [GB]
- [A] US 5431753 A 19950711 - KIM TAI W [KR], et al
- [A] US 2007035118 A1 20070215 - NI CHI-MOU [US], et al
- [A] US 2003102697 A1 20030605 - YAKATA TAKASHI [JP], et al
- [A] US 5974847 A 19991102 - SAUNDERS FREDERICK IRVIN [US], et al
- [A] EP 1435268 A1 20040707 - GEN MOTORS CORP [US]
- [A] US 2005189791 A1 20050901 - CHERNOFF ADRIAN B [US], et al
- [A] CORNETTE D ET AL: "ULTRA HIGH STRENGTH FEMN TWIP STEELS FOR AUTOMOTIVE SAFETY PARTS//ACIERS A TRES HAUTE RESISTANCE FEMN TWIP POUR PIECES DE SECURITE DANS LA CONSTRUCTION AUTOMOBILE", CAHIERS D'INFORMATIONS TECHNIQUES DE LA REVUE DE METALLURGIE, REVUE DE METALLURGIE. PARIS, FR, vol. 102, no. 12, 1 December 2005 (2005-12-01), pages 905 - 918, XP001237935, ISSN: 0035-1563
- [A] SCOTT C ET AL: "THE DEVELOPMENT OF A NEW FE-MN-C AUSTENITIC STEEL FOR AUTOMOTIVE APPLICATIONS", CAHIERS D'INFORMATIONS TECHNIQUES DE LA REVUE DE METALLURGIE, REVUE DE METALLURGIE. PARIS, FR, vol. 103, no. 6, 1 June 2006 (2006-06-01), pages 293 - 302, XP001500771, ISSN: 0035-1563
Citation (examination)
MEYER ET AL: "Increasing of the drawing depth using tailor rolled blanks-Numerical and experimental analysis", INTERNATIONAL JOURNAL OF MACHINE TOOL DESIGN AND RESEARCH, PERGAMON PRESS, OXFORD, GB, vol. 48, no. 5, 6 February 2008 (2008-02-06), pages 522 - 531, XP022458361, ISSN: 0020-7357, DOI: 10.1016/J.IJMACHTOOLS.2007.08.003
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
DOCDB simple family (application)
EP 08101118 A 20080130