EP 3699314 A1 20200826 - UTILITY FERRITIC STAINLESS STEEL HAVING EXCELLENT HOT WORKABILITY, AND MANUFACTURING METHOD THEREFOR
Title (en)
UTILITY FERRITIC STAINLESS STEEL HAVING EXCELLENT HOT WORKABILITY, AND MANUFACTURING METHOD THEREFOR
Title (de)
FERRITISCHER ROSTFREIER NUTZSTAHL MIT AUSGEZEICHNETER WARMVERFORMBARKEIT UND VERFAHREN ZU SEINER HERSTELLUNG
Title (fr)
ACIER INOXYDABLE FERRITIQUE UTILITAIRE POSSÉDANT UNE EXCELLENTE APTITUDE AU FAÇONNAGE À CHAUD ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- KR 20170178047 A 20171222
- KR 2018013418 W 20181107
Abstract (en)
A manufacturing method of a utility ferritic stainless steel with excellent hot workability is disclosed. The manufacturing method of a ferritic stainless steel according to an embodiment of the present disclosure includes: manufacturing a slab including, in percent (%) by weight of the entire composition, C: 0.005 to 0.020%, N: 0.005 to 0.020%, Si: 0.5 to 0.8%, Mn: 0.5 to 1.5%, Cr: 11.0 to 12.5%, Ni: 0.2 to 0.6%, P: 0.035% or less (excluding 0), S: 0.01% or less (excluding 0), the remainder of iron (Fe) and other inevitable impurities; and hot rolling the slab after heating the slab, and the heating of the slab is performed in a temperature range of 1200 to 1250°C so that the fraction of δ-ferrite phase in the internal structure of the slab is 80 to 95%.
IPC 8 full level
C22C 38/40 (2006.01); C21D 6/00 (2006.01); C21D 7/13 (2006.01); C21D 8/00 (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)
CPC (source: EP KR US)
C21D 6/004 (2013.01 - EP KR); C21D 7/13 (2013.01 - EP KR); C21D 8/005 (2013.01 - EP KR); C21D 8/02 (2013.01 - EP); C21D 8/0205 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C21D 9/0081 (2013.01 - US); C21D 9/46 (2013.01 - EP); C22C 38/00 (2013.01 - EP); C22C 38/001 (2013.01 - EP KR US); C22C 38/002 (2013.01 - US); C22C 38/02 (2013.01 - EP KR); C22C 38/04 (2013.01 - EP KR US); C22C 38/40 (2013.01 - EP KR); C22C 38/42 (2013.01 - US); C22C 38/50 (2013.01 - US); C21D 2211/005 (2013.01 - EP KR US)
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 3699314 A1 20200826; EP 3699314 A4 20200826; CN 111448326 A 20200724; CN 111448326 B 20221028; KR 101987665 B1 20190611; US 2020392609 A1 20201217; WO 2019124729 A1 20190627
DOCDB simple family (application)
EP 18892556 A 20181107; CN 201880079341 A 20181107; KR 20170178047 A 20171222; KR 2018013418 W 20181107; US 201816772058 A 20181107