EP 3279353 A1 20180207 - HOT-ROLLED STEEL SHEET AND METHOD FOR PRODUCING SAME
Title (en)
HOT-ROLLED STEEL SHEET AND METHOD FOR PRODUCING SAME
Title (de)
HEISSGEWALZTES STAHLBLECH UND VERFAHREN ZUR HERSTELLUNG DAVON
Title (fr)
TÔLE D'ACIER LAMINÉE À CHAUD ET SON PROCÉDÉ DE PRODUCTION
Publication
Application
Priority
- JP 2015075329 A 20150401
- JP 2016001834 W 20160330
Abstract (en)
A hot rolled steel sheet comprises: a predetermined chemical composition; a microstructure in which a total area ratio of a tempered bainite phase and a tempered martensite phase is 70% or more, a total area ratio of a coarse pearlite phase, a martensite phase, and a retained austenite phase is 10% or less, the tempered bainite phase and the tempered martensite phase have laths with an average width of 1.0 µm or less as a substructure, a proportion of Fe-based carbides with an aspect ratio of 5 or less in Fe-based carbides precipitated inside and at boundaries of the laths is 80% or more, and MC-type carbides with an average particle size of 20 nm or less are dispersed and precipitated inside and at the boundaries of the laths; and an average dislocation density of 1.0 × 10 14 m -2 or more and 5.0 × 10 15 m -2 or less.
IPC 8 full level
C22C 38/00 (2006.01); C21D 6/00 (2006.01); C21D 6/02 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/08 (2006.01); C22C 38/10 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/22 (2006.01); C22C 38/28 (2006.01); C22C 38/38 (2006.01); C22C 38/60 (2006.01)
CPC (source: EP US)
C21D 1/25 (2013.01 - EP US); C21D 6/005 (2013.01 - US); C21D 6/008 (2013.01 - US); C21D 6/02 (2013.01 - US); C21D 8/0205 (2013.01 - US); C21D 8/0226 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP US); C21D 9/46 (2013.01 - US); C22C 38/00 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (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 38/08 (2013.01 - EP US); C22C 38/10 (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 38/22 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C22C 38/38 (2013.01 - EP US); C22C 38/60 (2013.01 - EP US); C21D 8/0273 (2013.01 - EP US); C21D 2211/002 (2013.01 - EP US); C21D 2211/004 (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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3279353 A1 20180207; EP 3279353 A4 20180207; EP 3279353 B1 20190327; CN 107429362 A 20171201; CN 107429362 B 20200623; JP 6075517 B1 20170208; JP WO2016157896 A1 20170427; KR 101989262 B1 20190613; KR 20170128555 A 20171122; MX 2017012493 A 20180118; US 2018119240 A1 20180503; WO 2016157896 A1 20161006
DOCDB simple family (application)
EP 16771783 A 20160330; CN 201680020526 A 20160330; JP 2016001834 W 20160330; JP 2016549181 A 20160330; KR 20177029834 A 20160330; MX 2017012493 A 20160330; US 201615561436 A 20160330