EP 4119692 A1 20230118 - FERRITE-BASED STAINLESS STEEL HAVING IMPROVED SURFACE CHARACTERISTICS AND METHOD FOR MANUFACTURING SAME
Title (en)
FERRITE-BASED STAINLESS STEEL HAVING IMPROVED SURFACE CHARACTERISTICS AND METHOD FOR MANUFACTURING SAME
Title (de)
FERRITBASIERTER EDELSTAHL MIT VERBESSERTEN OBERFLÄCHENEIGENSCHAFTEN UND VERFAHREN ZUR HERSTELLUNG DAVON
Title (fr)
ACIER INOXYDABLE À BASE DE FERRITE AYANT DES CARACTÉRISTIQUES DE SURFACE AMÉLIORÉES ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- KR 20200051690 A 20200428
- KR 2020014031 W 20201014
Abstract (en)
Disclosed are a ferrite-based stainless steel having improved surface characteristics and a method for manufacturing same. The ferrite-based stainless steel according to the present invention includes, in percent by weight (wt%), 0.001 to 0.05% of C, 0.001 to 0.05% of N, 0.1 to 1.0% of Si, 0.1 to 1.0% of Mn, 12.0 to 22.0% of Cr, 0.01 to 1.0% of Ti, 0.01 to 1.0% of Nb, and the remainder of Fe and unavoidable impurities, wherein micro flaws having a length of 100 µm or more are distributed at a density of 5 pieces/mm<sup>2</sup> or less.
IPC 8 full level
C21D 8/02 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01)
CPC (source: EP KR US)
C21D 6/002 (2013.01 - EP); C21D 7/04 (2013.01 - EP); C21D 8/0205 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP KR US); C21D 8/0236 (2013.01 - EP KR US); C21D 8/0242 (2013.01 - EP); C21D 8/0263 (2013.01 - EP); C21D 8/0273 (2013.01 - EP KR US); C21D 8/0278 (2013.01 - US); C21D 9/46 (2013.01 - EP); C22C 38/001 (2013.01 - US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (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 KR US); C22C 38/28 (2013.01 - EP KR US); C22C 38/32 (2013.01 - EP US); C21D 2211/005 (2013.01 - KR US)
Citation (search report)
See references of WO 2021221245A1
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
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4119692 A1 20230118; CN 115461485 A 20221209; KR 102370500 B1 20220304; KR 20210133026 A 20211105; US 2023144381 A1 20230511; WO 2021221245 A1 20211104
DOCDB simple family (application)
EP 20933826 A 20201014; CN 202080100176 A 20201014; KR 20200051690 A 20200428; KR 2020014031 W 20201014; US 202017918192 A 20201014