EP 3128032 A4 20170208 - THICK STEEL SHEET AND METHOD FOR PRODUCING SAME
Title (en)
THICK STEEL SHEET AND METHOD FOR PRODUCING SAME
Title (de)
DICKES STAHLBLECH UND VERFAHREN ZUR HERSTELLUNG DAVON
Title (fr)
TÔLE D'ACIER ÉPAISSE ET SON PROCÉDÉ DE PRODUCTION
Publication
Application
Priority
- JP 2014071529 A 20140331
- JP 2015001559 W 20150319
Abstract (en)
[origin: EP3128032A1] Provided is a thick steel plate which can preferably be used for members of, for example, industrial machines and transporting and conveying devices which are required to have abrasion resistance against, for example, rock, sand, ore, and slurry materials and a method for manufacturing the steel plate. A thick steel plate having a chemical composition containing, by mass%, C: 0.200% or more and 0.350% or less, Si: 0.05% or more and 0.45% or less, Mn: 0.50% or more and 2.00% or less, P: 0.020% or less, S: 0.005% or less, Al: 0.005% or more and 0.100% or less, one, two, or more of Cu, Ni, Cr, Mo, V, Nb, Ti, B, REM, Ca, and Mg, and the balance being Fe and inevitable impurities, in which CI, which is defined by a particular equation, is 40 or more, and a steel microstructure in which the area fraction of a bainite phase is 60% or more, the area fraction of Martensite-Austenite constituent is 5% or more and less than 20%, and the remaining constituent phases are one, two, or all of a ferrite phase, a pearlite phase, and a martensite phase. After hot-rolling the steel having the chemical composition described above, accelerated cooling is performed to a temperature range of 400°C or higher and 650°C or lower.
IPC 8 full level
C22C 38/00 (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 38/16 (2006.01); C22C 38/18 (2006.01); C22C 38/20 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR US)
C21D 8/0226 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP KR US); C21D 9/46 (2013.01 - EP KR US); C22C 38/00 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/005 (2013.01 - EP US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP 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 38/20 (2013.01 - EP US); C22C 38/22 (2013.01 - EP US); C22C 38/24 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C22C 38/32 (2013.01 - EP US); C22C 38/42 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/46 (2013.01 - EP KR US); C22C 38/48 (2013.01 - EP US); C22C 38/50 (2013.01 - EP KR US); C22C 38/54 (2013.01 - EP KR US); C22C 38/58 (2013.01 - EP KR US); C21D 2211/001 (2013.01 - EP US); C21D 2211/002 (2013.01 - EP KR US); C21D 2211/008 (2013.01 - EP KR US)
Citation (search report)
- [XA] WO 2014020891 A1 20140206 - JFE STEEL CORP [JP]
- [Y] JP 3578435 B2 20041020
- [Y] JP H08269615 A 19961015 - KOBE STEEL LTD
- [Y] JP 2010222682 A 20101007 - JFE STEEL CORP
- See references of WO 2015151443A1
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 3128032 A1 20170208; EP 3128032 A4 20170208; EP 3128032 B1 20190227; AU 2015242070 A1 20160915; AU 2015242070 B2 20180222; BR 112016022532 B1 20210525; CL 2016002494 A1 20170609; CN 106133171 A 20161116; CN 106133171 B 20180410; JP 2015193874 A 20151105; JP 6149778 B2 20170621; KR 101898567 B1 20180913; KR 20160140802 A 20161207; MX 2016012595 A 20161214; US 2017183750 A1 20170629; WO 2015151443 A1 20151008
DOCDB simple family (application)
EP 15774087 A 20150319; AU 2015242070 A 20150319; BR 112016022532 A 20150319; CL 2016002494 A 20160930; CN 201580017109 A 20150319; JP 2014071529 A 20140331; JP 2015001559 W 20150319; KR 20167029952 A 20150319; MX 2016012595 A 20150319; US 201515300314 A 20150319