EP 2955242 B1 20170503 - STEEL SHEET FOR NITRIDING AND PRODUCTION METHOD THEREFOR
Title (en)
STEEL SHEET FOR NITRIDING AND PRODUCTION METHOD THEREFOR
Title (de)
STAHLBLECH ZUM NITRIEREN UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
TÔLE D'ACIER POUR NITRURATION ET PROCÉDÉ DE PRODUCTION DE CELLE-CI
Publication
Application
Priority
- JP 2013076824 A 20130402
- JP 2014001603 W 20140320
Abstract (en)
[origin: EP2955242A1] Provided is a steel sheet for nitriding having excellent formability and punchability. A steel sheet for nitriding has a composition including, in percent by mass, 0.02% to 0.08% of C, 0.1% or less of Si, 0.2% to 1.8% of Mn, 0.05% or less of P, 0.02% or less of S, 0.01% to 0.06% of Al, 0.5% to 1.5% of Cr, 0.01% or less of N, and the balance being Fe and incidental impurities; and has a microstructure including ferrite as a main phase and pearlite and/or bainite as a secondary phase. The ferrite has a fraction of 70% or more in the entire microstructure and an average grain diameter of 5 to 25 µm. An average length of the major axis of cementite present in the secondary phase in a cross section in the rolling direction of the steel sheet is 3.0 µm or less.
IPC 8 full level
C22C 38/00 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C21D 9/46 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/36 (2006.01); C22C 38/38 (2006.01); C23C 8/26 (2006.01); C23C 8/32 (2006.01)
CPC (source: EP US)
C21D 6/002 (2013.01 - EP US); C21D 6/005 (2013.01 - EP US); C21D 6/008 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP US); C21D 9/46 (2013.01 - EP US); C22C 38/00 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/24 (2013.01 - EP US); C22C 38/26 (2013.01 - EP US); C22C 38/28 (2013.01 - EP US); C22C 38/36 (2013.01 - EP US); C22C 38/38 (2013.01 - EP US); C23C 8/26 (2013.01 - EP US); C23C 8/32 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C21D 2211/002 (2013.01 - EP US); C21D 2211/005 (2013.01 - EP US); C21D 2211/009 (2013.01 - EP 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
DOCDB simple family (publication)
EP 2955242 A1 20151216; EP 2955242 A4 20160210; EP 2955242 B1 20170503; CN 105102659 A 20151125; CN 105102659 B 20170405; JP 2014201764 A 20141027; JP 5630523 B2 20141126; KR 101733513 B1 20170508; KR 20150126661 A 20151112; MX 2015013940 A 20151208; TW 201500560 A 20150101; TW I548755 B 20160911; US 2016032431 A1 20160204; WO 2014162677 A1 20141009
DOCDB simple family (application)
EP 14779834 A 20140320; CN 201480019178 A 20140320; JP 2013076824 A 20130402; JP 2014001603 W 20140320; KR 20157027610 A 20140320; MX 2015013940 A 20140320; TW 103111885 A 20140331; US 201414781440 A 20140320