EP 3556888 A4 20191023 - FERRITIC STAINLESS STEEL WITH EXCELLENT RIDGING PROPERTY AND SURFACE QUALITY AND MANUFACTURING METHOD THEREFOR
Title (en)
FERRITIC STAINLESS STEEL WITH EXCELLENT RIDGING PROPERTY AND SURFACE QUALITY AND MANUFACTURING METHOD THEREFOR
Title (de)
FERRITISCHER EDELSTAHL MIT HERVORRAGENDER RIDGING-EIGENSCHAFT UND OBERFLÄCHENGÜTE UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
ACIER INOXYDABLE FERRITIQUE PRÉSENTANT UNE EXCELLENTE PROPRIÉTÉ DE FORMATION DE STRIES ET UNE EXCELLENTE QUALITÉ DE SURFACE, ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- KR 20160169696 A 20161213
- KR 2017007099 W 20170704
Abstract (en)
[origin: EP3556888A1] Disclosed herein are a ferritic stainless steel having excellent ridging properties and excellent surface quality of a final product by modifying a microstructure of a central area of a cross-section by further performing cold rolling before hot annealing.A ferritic stainless steel according to the present disclosure includes, by wt%, 0.005 to 0.1% of carbon (C), 0.01 to 2.0% of silicon (Si), 0.01 to 1.5% of manganese (Mn), 0.05% or less of phosphorus (P), 0.005% or less of surfur (S), 10 to 30% of chromium (Cr), 0.005 to 0.1% of nitrogen (N), 0.005 to 0.2% of aluminum (Al), and the remainder of iron (Fe) and other impurities, wherein a γvalue is in the range of 20% to less than 50%, and a surface microgroove area ratio is 2.0% or less.
IPC 8 full level
C22C 38/18 (2006.01); C21D 8/04 (2006.01); C21D 9/48 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01)
CPC (source: EP KR US)
C21D 6/002 (2013.01 - EP); C21D 8/0226 (2013.01 - KR); C21D 8/0236 (2013.01 - KR); C21D 8/0263 (2013.01 - US); C21D 8/0268 (2013.01 - US); C21D 8/0273 (2013.01 - US); C21D 8/0405 (2013.01 - EP); C21D 8/0426 (2013.01 - EP); C21D 8/0436 (2013.01 - EP); C21D 8/0473 (2013.01 - EP); C21D 9/0081 (2013.01 - US); C21D 9/46 (2013.01 - KR); C21D 9/48 (2013.01 - EP); C22C 38/00 (2013.01 - EP); C22C 38/001 (2013.01 - EP US); C22C 38/004 (2013.01 - EP KR); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP); C22C 38/06 (2013.01 - EP US); C22C 38/18 (2013.01 - EP KR US); C22C 38/40 (2013.01 - EP); C21D 2211/005 (2013.01 - EP KR US)
Citation (search report)
- [XI] US 4394188 A 19830719 - HARASE JIROU [JP], et al
- [AD] KR 20080061863 A 20080703 - POSCO [KR]
- [A] US 2010269887 A1 20101028 - REYAL JEAN-PIERRE [FR], et al
- [A] KR 20030050695 A 20030625 - POSCO [KR]
- [A] JP H1046293 A 19980217 - NIPPON STEEL CORP
- [A] US 2005241737 A1 20051103 - UJIRO TAKUMI [JP], et al
- See also references of WO 2018110785A1
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 3556888 A1 20191023; EP 3556888 A4 20191023; CN 110073022 A 20190730; CN 110073022 B 20210629; JP 2020510135 A 20200402; JP 7116064 B2 20220809; KR 101921595 B1 20181126; KR 20180068089 A 20180621; US 2019316237 A1 20191017; WO 2018110785 A1 20180621
DOCDB simple family (application)
EP 17881883 A 20170704; CN 201780077285 A 20170704; JP 2019531659 A 20170704; KR 20160169696 A 20161213; KR 2017007099 W 20170704; US 201716468883 A 20170704