EP 3872214 A4 20210901 - HIGH MANGANESE STEEL HAVING EXCELLENT OXYGEN CUTTING PROPERTIES, AND MANUFACTURING METHOD THEREFOR
Title (en)
HIGH MANGANESE STEEL HAVING EXCELLENT OXYGEN CUTTING PROPERTIES, AND MANUFACTURING METHOD THEREFOR
Title (de)
MANGANREICHER STAHL MIT AUSGEZEICHNETEN SAUERSTOFFSCHNEIDEIGENSCHAFTEN UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
ACIER À HAUTE TENEUR EN MANGANÈSE AYANT D'EXCELLENTES PROPRIÉTÉS DE COUPE À L'OXYGÈNE ET PROCÉDÉ DE FABRICATION S'Y RAPPORTANT
Publication
Application
Priority
- KR 20180128502 A 20181025
- KR 20190118923 A 20190926
- KR 2019014184 W 20191025
Abstract (en)
[origin: EP3872214A1] The high manganese steel having excellent oxygen cutting properties, according to one aspect of the present invention, comprises 0.1-0.5 wt% of carbon (C), 20-26 wt% of manganese (Mn), 0.05-0.4 wt% of silicon (Si), at most 2.0 wt% of aluminum (Al), and at most 4 wt% of chromium (Cr), with the remainder being Fe and other unavoidable impurities, and has a cutting sensitivity (Sc), calculated according to [relational expression 1] below, of at least 430 and may comprise at least 95 area% of austenite as a microstructure. [Relational expression 1] Cutting sensitivity (Sc) = 1742 - 662*[C] - 19.2*[Mn] + 1.6*[Al] - 140*[Cr] (In [relational expression 1], [C], [Mn], [Al], and [Cr] represent the respective percentages by weight of C, Mn, Al, and Cr included in the steel and, if the elements concerned are not included, represent 0.)
IPC 8 full level
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 38/32 (2006.01); C22C 38/38 (2006.01)
CPC (source: EP KR)
C21D 1/02 (2013.01 - EP); C21D 6/00 (2013.01 - EP); C21D 6/002 (2013.01 - EP); 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 38/02 (2013.01 - EP KR); C22C 38/04 (2013.01 - EP KR); C22C 38/06 (2013.01 - EP KR); C22C 38/32 (2013.01 - EP KR); C22C 38/38 (2013.01 - EP KR); C21D 2211/001 (2013.01 - EP KR); C21D 2261/00 (2013.01 - EP)
Citation (search report)
- [X] WO 2017111510 A1 20170629 - POSCO [KR]
- [XI] JP S621823 A 19870107 - KOBE STEEL LTD
- [XI] JP 2013023743 A 20130204 - KOBE STEEL LTD
- [A] CN 107620010 A 20180123 - WUYANG IRON & STEEL CO LTD
- [A] WO 2009084792 A1 20090709 - POSCO [KR], et al
- [A] US 4329172 A 19820511 - OUCHI CHIAKI, et al
- See references of WO 2020085855A1
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 3872214 A1 20210901; EP 3872214 A4 20210901; CN 112912526 A 20210604; CN 112912526 B 20220802; KR 102245226 B1 20210428; KR 20200047316 A 20200507
DOCDB simple family (application)
EP 19876472 A 20191025; CN 201980069176 A 20191025; KR 20190118923 A 20190926