EP 3553195 A4 20191016 - HIGH MN STEEL SHEET AND METHOD FOR PRODUCING SAME
Title (en)
HIGH MN STEEL SHEET AND METHOD FOR PRODUCING SAME
Title (de)
HOCHFESTES MN-STAHLBLECH UND VERFAHREN ZUR HERSTELLUNG DAVON
Title (fr)
TÔLE D'ACIER À HAUTE TENEUR EN MN ET PROCÉDÉ DE PRODUCTION DE CELLE-CI
Publication
Application
Priority
- JP 2016005080 W 20161208
- JP 2017043245 W 20171201
Abstract (en)
[origin: EP3553195A1] A high-Mn steel plate and a manufacturing method therefor are provided. The high-Mn steel plate has a component composition containing, in mass%, C: 0.20 to 0.70%, Si: 0.05 to 1.0%, Mn: 15 to 30%, P: 0.028% or less, S: 0.02% or less, Al: 0.01 to 0.1%, Cr: 0.5 to 7.0%, Ni: 0.03 to 0.30%, N: 0.0010 to 0.0200%, and one or two or more of Nb: 0.003 to 0.030%, V: 0.03 to 0.10%, and Ti: 0.003 to 0.040%, with the balance being Fe and incidental impurities, where: a microstructure 0.5 mm under a surface of the steel plate includes austenite as a base phase; and 25% or more of the austenite, in area ratio, has an equivalent circle diameter of 10 µm or more and an aspect ratio of a major axis to a minor axis of 3 or more.
IPC 8 full level
C22C 38/00 (2006.01); C21D 6/00 (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 38/12 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP KR)
C21D 6/005 (2013.01 - EP); C21D 8/02 (2013.01 - KR); C21D 8/0226 (2013.01 - EP); C21D 8/0263 (2013.01 - EP); C21D 9/46 (2013.01 - EP); C22C 38/001 (2013.01 - EP); C22C 38/02 (2013.01 - EP); C22C 38/04 (2013.01 - EP); C22C 38/06 (2013.01 - EP); C22C 38/12 (2013.01 - EP); C22C 38/48 (2013.01 - EP); C22C 38/50 (2013.01 - EP); C22C 38/58 (2013.01 - EP KR); C21D 2211/001 (2013.01 - EP KR)
Citation (search report)
- [X] JP 2016196703 A 20161124 - NIPPON STEEL & SUMITOMO METAL CORP
- [AD] JP 2016084529 A 20160519 - NIPPON STEEL & SUMITOMO METAL CORP
- [A] WO 2016052397 A1 20160407 - NIPPON STEEL & SUMITOMO METAL CORP [JP]
- [A] ICHIRO DAIGO ET AL: "Comparison of Tramp Elements Compositions in Steel Bars between Japan and China", TETSU TO HAGANE: JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN, vol. 100, no. 6, 1 January 2014 (2014-01-01), JP, pages 756 - 760, XP055510095, ISSN: 0021-1575, DOI: 10.2355/tetsutohagane.100.756
- See references of WO 2018105510A1
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 3553195 A1 20191016; EP 3553195 A4 20191016; EP 3553195 B1 20210519; BR 112019010870 A2 20191001; BR 112019010870 B1 20230411; CN 110050082 A 20190723; CN 110050082 B 20210622; JP 6418358 B1 20181107; JP WO2018105510 A1 20181206; KR 102309644 B1 20211006; KR 20190077470 A 20190703; KR 20210072140 A 20210616; PH 12019501270 A1 20191216; TW 201825694 A 20180716; TW I653343 B 20190311; WO 2018104984 A1 20180614; WO 2018105510 A1 20180614
DOCDB simple family (application)
EP 17879107 A 20171201; BR 112019010870 A 20171201; CN 201780075814 A 20171201; JP 2016005080 W 20161208; JP 2017043245 W 20171201; JP 2018512637 A 20171201; KR 20197015408 A 20171201; KR 20217017558 A 20171201; PH 12019501270 A 20190606; TW 106142964 A 20171207