EP 2604715 A1 20130619 - METHOD FOR MANUFACTURING A HIGH-STRENGTH COLD-ROLLED STEEL SHEET HAVING EXCELLENT FORMABILITY AND CRASHWORTHINESS
Title (en)
METHOD FOR MANUFACTURING A HIGH-STRENGTH COLD-ROLLED STEEL SHEET HAVING EXCELLENT FORMABILITY AND CRASHWORTHINESS
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES HOCHFESTEN KALTGEWALZTEN STAHLBLECHS MIT AUSGEZEICHNETER FORMBARKEIT UND CRASHFESTIGKEIT
Title (fr)
PROCÉDÉ DE FABRICATION D'UNE TÔLE D'ACIER LAMINÉE À FROID À HAUTE RÉSISTANCE AYANT UNE EXCELLENTE FORMABILITÉ ET RÉSISTANCE À L'IMPACT
Publication
Application
Priority
JP 2010063949 W 20100812
Abstract (en)
A high-strength cold rolled steel sheet having excellent ductility and stretch flangeability and a method for manufacturing the same are provided. A high-strength cold rolled steel sheet having excellent formability and crashworthiness includes, on a mass% basis, C: 0.05 to 0.3%, Si: 0.3 to 2.5%, Mn: 0.5 to 3.5%, P: 0.003 to 0.100%, S: 0.02% or less, Al: 0.010 to 0.5%, and balance being iron and unavoidable impurities, the high-strength cold rolled steel sheet having a microstructure including 20% or more of ferrite on an area fraction basis, 10 to 60% of tempered martensite on an area fraction basis, 0 to 10% of martensite on an area fraction basis, and 3 to 15% of retained austenite on a volume fraction basis.
IPC 8 full level
C22C 38/06 (2006.01); C21D 9/46 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR US)
C21D 1/25 (2013.01 - EP US); C21D 8/0205 (2013.01 - US); C21D 9/46 (2013.01 - EP KR US); C22C 38/001 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP KR US); C22C 38/08 (2013.01 - US); C22C 38/12 (2013.01 - US); C22C 38/14 (2013.01 - US); C22C 38/16 (2013.01 - US); C22C 38/34 (2013.01 - US); C22C 38/58 (2013.01 - KR); C22C 38/60 (2013.01 - US); C21D 9/02 (2013.01 - EP US); C21D 2211/001 (2013.01 - EP US); C21D 2211/005 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP US)
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 2604715 A1 20130619; EP 2604715 A4 20171213; EP 2604715 B1 20191211; CA 2805834 A1 20120216; CA 2805834 C 20160607; CN 103069040 A 20130424; KR 20130036763 A 20130412; MX 2013001456 A 20130429; US 2013133792 A1 20130530; WO 2012020511 A1 20120216
DOCDB simple family (application)
EP 10855912 A 20100812; CA 2805834 A 20100812; CN 201080068578 A 20100812; JP 2010063949 W 20100812; KR 20137003735 A 20100812; MX 2013001456 A 20100812; US 201013816561 A 20100812