EP 1920078 A4 20100324 - STEEL SHEET FOR DEEP DRAWING HAVING EXCELLENT SECONDARY WORK EMBRITTLEMENT RESISTANCE, FATIGUE PROPERTIES AND PLATING PROPERTIES, AND METHOD FOR MANUFACTURING THE SAME
Title (en)
STEEL SHEET FOR DEEP DRAWING HAVING EXCELLENT SECONDARY WORK EMBRITTLEMENT RESISTANCE, FATIGUE PROPERTIES AND PLATING PROPERTIES, AND METHOD FOR MANUFACTURING THE SAME
Title (de)
STAHLBLECH ZUM TIEFZIEHEN MIT HERVORRAGENDER BESTÄNDIGKEIT GEGEN VERFORMUNGSINDUZIERTE VERSPRÖDUNG, HERVORRAGENDEN ERMÜDUNGSEIGENSCHAFTEN UND HERVORRAGENDEN PLATTIERUNGSEIGENSCHAFTEN UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
TÔLE D ACIER POUR EMBOUTISSAGE PROFOND PRÉSENTANT UNE EXCELLENTE RÉSISTANCE À LA FRAGILISATION PAR LE RÉUSINAGE ET D EXCELLENTES PROPRIÉTÉS EN MATIÈRE DE FATIGUE ET DE PLACAGE, ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- KR 2006002657 W 20060707
- KR 20050061691 A 20050708
Abstract (en)
[origin: WO2007007983A1] A steel sheet for deep drawing used for automobiles, and a method for manufacturing the same are disclosed. The steel sheet comprises, by weight%, C: 0.010% or less, Si: 0.02% or less, Mn: 0.06 ~ 1.5%, P: 0.15% or less, S: 0.020% or less, Sol. Al: 0.10 ~ 0.40%, N: 0.010% or less, Ti: 0.003 ~ 0.010%, Nb: 0.003 ~ 0.040%, B: 0.0002 ~ 0.0020%, and the balance of Fe and other unavoidable impurities, wherein the composition of Ti, Al, B, and N satisfies the relationship: 1.0 < (Ti[%]+Al[%]/16+6B[%])/3.43N[%] < 4.1, and wherein the composition of Nb, Al, and C satisfies the relationship: 0.7 < (Nb[%]+Al[%]/20)/7.75C[%] < 3.5. The steel sheet exhibits excellent secondary work embrittlement, fatigue properties of welded joints, and an appealing plated surface as well as excellent formability.
IPC 8 full level
C22C 38/00 (2006.01); C21D 8/04 (2006.01)
CPC (source: EP KR US)
C21D 8/0221 (2013.01 - EP KR US); C21D 8/0226 (2013.01 - EP KR US); C21D 8/0236 (2013.01 - EP KR US); C21D 8/0421 (2013.01 - EP KR US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C22C 38/12 (2013.01 - EP KR US); C22C 38/14 (2013.01 - EP KR US)
Citation (search report)
- [DX] WO 2004003247 A1 20040108 - POSCO [KR], et al
- [PA] WO 2006001583 A1 20060105 - POSCO [KR], et al
- [A] EP 0539962 A1 19930505 - KAWASAKI STEEL CO [JP]
- [A] KR 20030053802 A 20030702 - POSCO [KR]
- [A] KR 20040058489 A 20040705 - POSCO
- See references of WO 2007007983A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2007007983 A1 20070118; WO 2007007983 A9 20100916; AT E550448 T1 20120415; CN 101218363 A 20080709; CN 101218363 B 20101208; EP 1920078 A1 20080514; EP 1920078 A4 20100324; EP 1920078 B1 20120321; JP 2009500524 A 20090108; JP 4848423 B2 20111228; KR 100685030 B1 20070220; KR 20070006393 A 20070111; US 2008196799 A1 20080821
DOCDB simple family (application)
KR 2006002657 W 20060707; AT 06769200 T 20060707; CN 200680025013 A 20060707; EP 06769200 A 20060707; JP 2008520188 A 20060707; KR 20050061691 A 20050708; US 99463006 A 20060707