EP 3872215 A4 20210901 - HIGH MANGANESE AUSTENITIC STEEL HAVING HIGH YIELD STRENGTH AND MANUFACTURING METHOD FOR SAME
Title (en)
HIGH MANGANESE AUSTENITIC STEEL HAVING HIGH YIELD STRENGTH AND MANUFACTURING METHOD FOR SAME
Title (de)
MANGANREICHER AUSTENITISCHER STAHL MIT HOHER STRECKGRENZE UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
ACIER AUSTÉNITIQUE À HAUTE TENEUR EN MANGANÈSE AYANT UNE HAUTE LIMITE D'ÉLASTICITÉ ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- KR 20180128500 A 20181025
- KR 20190118926 A 20190926
- KR 2019014175 W 20191025
Abstract (en)
[origin: EP3872215A1] A high manganese austenitic steel having high yield strength according to one aspect of the present invention, comprises: by wt%, 0.2% to 0.5% of C, 20% to 28% of Mn, 0.05% to 0.5% of Si, 0.03% or less of P, 0.005% or less of S, 0.005% to 0.05% of Al, and the remainder being Fe and other unavoidable impurities; and 95 area% or more of austenite as a microstructure, wherein the grain boundary fraction in crystal grains of the microstructure may be 7 area% or more.
IPC 8 full level
C22C 38/38 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/16 (2006.01); C22C 38/20 (2006.01)
CPC (source: EP KR)
C21D 6/005 (2013.01 - EP); C21D 8/02 (2013.01 - EP); C21D 8/0205 (2013.01 - EP); C21D 8/0226 (2013.01 - EP KR); C21D 8/0263 (2013.01 - EP KR); C21D 9/46 (2013.01 - EP); C22C 38/00 (2013.01 - EP); C22C 38/02 (2013.01 - EP KR); C22C 38/06 (2013.01 - KR); C22C 38/20 (2013.01 - EP); C22C 38/32 (2013.01 - KR); C22C 38/38 (2013.01 - EP KR); C21D 1/02 (2013.01 - EP); C21D 2211/001 (2013.01 - EP KR)
Citation (search report)
- [XI] CN 106222554 A 20161214 - NANJING IRON & STEEL CO LTD
- [A] KR 20160078664 A 20160705 - POSCO [KR]
- [A] KR 20180074450 A 20180703 - POSCO [KR]
- [A] CN 107177786 A 20170919 - UNIV NORTHEASTERN
- [A] WO 2017111510 A1 20170629 - POSCO [KR]
- [A] JP S5623259 A 19810305 - SUMITOMO METAL IND
- See also references of WO 2020085852A1
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 3872215 A1 20210901; EP 3872215 A4 20210901; CN 112912530 A 20210604; CN 112912530 B 20230124; KR 102290780 B1 20210820; KR 102389019 B1 20220422; KR 20200047319 A 20200507; KR 20210102146 A 20210819
DOCDB simple family (application)
EP 19876536 A 20191025; CN 201980069181 A 20191025; KR 20190118926 A 20190926; KR 20210105855 A 20210811