EP 3556896 B1 20211110 - HIGH STRENGTH COLD ROLLED STEEL PLATE HAVING EXCELLENT YIELD STRENGTH, DUCTILITY AND HOLE EXPANDABILITY, AND HOT DIP GALVANIZED STEEL PLATE
Title (en)
HIGH STRENGTH COLD ROLLED STEEL PLATE HAVING EXCELLENT YIELD STRENGTH, DUCTILITY AND HOLE EXPANDABILITY, AND HOT DIP GALVANIZED STEEL PLATE
Title (de)
HOCHFESTES KALTGEWALZTES STAHLBLECH MIT HERVORRAGENDER STRECKGRENZE, DUKTILITÄT UND LOCHDEHNBARKEIT, UND FEUERVERZINKTES STAHLBLECH
Title (fr)
TÔLE D'ACIER LAMINÉE À FROID À HAUTE RÉSISTANCE PRÉSENTANT UNE EXCELLENTE LIMITE D'ÉLASTICITÉ, UNE EXCELLENTE DUCTILITÉ ET UNE EXCELLENTE CAPACITÉ D'EXPANSION DE TROU, ET TÔLE D'ACIER GALVANISÉE PAR IMMERSION À CHAUD
Publication
Application
Priority
- KR 20160173006 A 20161216
- KR 2017013762 W 20171129
Abstract (en)
[origin: EP3556896A1] Provided are a high strength cold rolled steel sheet having excellent yield strength, ductility, and hole expandability, a hot dip galvanized steel sheet, and a method for producing same. The cold rolled steel sheet of the present invention comprises 0.06-0.2 wt% of carbon (C), 1.5-3.0 wt% of manganese (Mn), 0.3-2.5 wt% of silicon (Si), 0.01-0.2 wt% of aluminum (Al), 0.01-3.0 wt% of nickel (Ni), 0.2 wt% or less of molybdenum (Mo), 0.01-0.05 wt% of titanium (Ti), 0.02-0.05 wt% of antimony (Sb), 0.0005-0.003 wt% of boron (B), 0.01 wt% or less (but not 0%) of nitrogen (N), with the remainder comprising Fe and unavoidable impurities, and the microstructure thereof comprises, in terms of area fraction, 50% or more of bainite, 10% or more of tempered martensite (TM), 10% or less of fresh martensite (FM), 20% or less of residual austenite, and 5% or less of ferrite.
IPC 8 full level
C21D 1/18 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/44 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01); C22C 38/58 (2006.01); C22C 38/60 (2006.01); C23C 2/06 (2006.01); C23C 2/40 (2006.01)
CPC (source: EP KR US)
C21D 1/18 (2013.01 - EP); C21D 8/02 (2013.01 - EP); C21D 8/0226 (2013.01 - EP KR US); C21D 8/0236 (2013.01 - EP KR US); C21D 8/0263 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C22C 38/001 (2013.01 - US); C22C 38/008 (2013.01 - US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - 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 38/44 (2013.01 - EP KR); C22C 38/50 (2013.01 - EP KR); C22C 38/54 (2013.01 - EP KR); C22C 38/58 (2013.01 - EP KR); C22C 38/60 (2013.01 - EP KR); C23C 2/06 (2013.01 - EP KR US); C23C 2/40 (2013.01 - EP KR); C21D 2211/001 (2013.01 - EP US); C21D 2211/002 (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 RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3556896 A1 20191023; EP 3556896 A4 20191023; EP 3556896 B1 20211110; CN 110073026 A 20190730; CN 110073026 B 20210907; JP 2020509177 A 20200326; JP 6846522 B2 20210324; KR 101858852 B1 20180628; US 2020190612 A1 20200618; WO 2018110867 A1 20180621; WO 2018110867 A8 20190131
DOCDB simple family (application)
EP 17881067 A 20171129; CN 201780077454 A 20171129; JP 2019531765 A 20171129; KR 20160173006 A 20161216; KR 2017013762 W 20171129; US 201716468162 A 20171129