EP 3178949 B1 20200129 - HIGH-STRENGTH STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Title (en)
HIGH-STRENGTH STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Title (de)
HOCHFESTES STAHLBLECH UND VERFAHREN ZUR HERSTELLUNG DAVON
Title (fr)
TÔLE D'ACIER À HAUTE RÉSISTANCE AINSI QUE PROCÉDÉ DE FABRICATION DE CELLE-CI
Publication
Application
Priority
- JP 2014161677 A 20140807
- JP 2015003947 W 20150805
Abstract (en)
[origin: EP3178949A1] Disclosed is a method comprising: preparing a steel slab with a predetermined chemical composition; subjecting the steel slab to hot rolling by heating it to a temperature of 1100-1300 °C, hot rolling it with a finisher delivery temperature of 800-1000 °C to form a hot-rolled steel sheet, and coiling the steel sheet at a mean coiling temperature of 200-500 °C; subjecting the steel sheet to pickling treatment; subjecting the steel sheet to annealing by retaining the steel sheet at a temperature of 740-840 °C for 10-900 s, and the cooling the steel sheet at a mean cooling rate of 5-30 °C/s to a cooling stop temperature of 150-350 °C; and subjecting the steel sheet to reheating treatment by reheating the steel sheet to a reheating temperature of higher than 350 °C and 550 °C or lower, and retaining the steel sheet at the reheating temperature for 10 s or more.
IPC 8 full level
C21D 9/46 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/18 (2006.01); C22C 38/38 (2006.01); C22C 38/60 (2006.01); C23C 2/02 (2006.01); C23C 2/06 (2006.01); C23C 2/28 (2006.01); C23F 17/00 (2006.01)
CPC (source: EP US)
C21D 6/005 (2013.01 - EP US); C21D 6/008 (2013.01 - EP US); C21D 8/0205 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C21D 8/0236 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP US); C21D 8/0273 (2013.01 - EP US); C21D 8/0278 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/005 (2013.01 - EP US); C22C 38/008 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (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 38/38 (2013.01 - EP US); C22C 38/60 (2013.01 - EP US); C23C 2/02 (2013.01 - EP US); C23C 2/0224 (2022.08 - EP US); C23C 2/024 (2022.08 - EP US); C23C 2/06 (2013.01 - EP US); C23C 2/28 (2013.01 - EP US); 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); C23F 17/00 (2013.01 - EP US)
Citation (examination)
EP 2762585 A1 20140806 - NIPPON STEEL & SUMITOMO METAL 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 RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3178949 A1 20170614; EP 3178949 A4 20170705; EP 3178949 B1 20200129; CN 106574319 A 20170419; CN 106574319 B 20190101; JP 5967319 B2 20160810; JP WO2016021196 A1 20170427; MX 2017001527 A 20170511; US 2017204491 A1 20170720; WO 2016021196 A1 20160211
DOCDB simple family (application)
EP 15830601 A 20150805; CN 201580041892 A 20150805; JP 2015003947 W 20150805; JP 2015558683 A 20150805; MX 2017001527 A 20150805; US 201515326793 A 20150805