EP 2623631 B1 20221102 - HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING SAME
Title (en)
HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING SAME
Title (de)
HOCHFESTES STAHLBLECH UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
TÔLE D'ACIER À HAUTE RÉSISTANCE ET PROCÉDÉ DE PRODUCTION ASSOCIÉ
Publication
Application
Priority
JP 2010067612 W 20100930
Abstract (en)
[origin: EP2623631A1] The invention provides a high strength steel sheet which exhibits excellent chemical convertibility and corrosion resistance after electrodeposition coating even in the case where the steel sheet has a high Si content, and a method for manufacturing such steel sheets. The method includes continuous annealing of a steel sheet which includes, in terms of mass%, C at 0.01 to 0.18%, Si at 0.4 to 2.0%, Mn at 1.0 to 3.0%, Al at 0.001 to 1.0%, P at 0.005 to 0.060% and S at ‰¤ 0.01%, the balance being represented by Fe and inevitable impurities, while controlling the dew-point temperature of the atmosphere to become not less than -10°C when the heating furnace inside temperature is in the range of not less than A°C and not more than B°C during the course of heating (A: 600 ‰¤ A ‰¤ 780, B: 800 ‰¤ B ‰¤ 900).
IPC 8 full level
C23C 8/14 (2006.01); C21D 8/04 (2006.01); C21D 9/46 (2006.01); C21D 9/56 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR US)
C21D 8/0447 (2013.01 - EP US); C21D 8/0478 (2013.01 - EP US); C21D 9/46 (2013.01 - EP KR US); C21D 9/561 (2013.01 - EP US); C22C 38/002 (2013.01 - EP 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 38/08 (2013.01 - EP US); C22C 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP US); C22C 38/16 (2013.01 - EP US); C22C 38/18 (2013.01 - EP US); C22C 38/42 (2013.01 - KR); C22C 38/44 (2013.01 - KR); C22C 38/48 (2013.01 - KR); C22C 38/50 (2013.01 - KR); C22C 38/54 (2013.01 - KR); C22C 38/58 (2013.01 - KR); C23C 8/10 (2013.01 - EP); C23C 8/14 (2013.01 - EP KR US); C21D 9/56 (2013.01 - EP US); C23C 22/184 (2013.01 - EP US)
Citation (examination)
EP 2415896 A1 20120208 - JFE STEEL CORP [JP]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
EP 2623631 A1 20130807; EP 2623631 A4 20161123; EP 2623631 B1 20221102; BR 112013007163 A2 20160614; CA 2811489 A1 20120405; CA 2811489 C 20161122; CN 103154297 A 20130612; CN 103154297 B 20160518; KR 20130049820 A 20130514; US 2013327452 A1 20131212; WO 2012042677 A1 20120405
DOCDB simple family (application)
EP 10857890 A 20100930; BR 112013007163 A 20100930; CA 2811489 A 20100930; CN 201080069338 A 20100930; JP 2010067612 W 20100930; KR 20137008043 A 20100930; US 201013822153 A 20100930