EP 3421631 A4 20190724 - STEEL SHEET FOR HARDENING, HARDENED MEMBER, AND METHOD FOR MANUFACTURING STEEL SHEET FOR HARDENING
Title (en)
STEEL SHEET FOR HARDENING, HARDENED MEMBER, AND METHOD FOR MANUFACTURING STEEL SHEET FOR HARDENING
Title (de)
STAHLBLECH ZUR AUSHÄRTUNG, AUSGEHÄRTETES ELEMENT UND VERFAHREN ZUR HERSTELLUNG DES STAHLBLECHS ZUR AUSHÄRTUNG
Title (fr)
TÔLE D'ACIER DESTINÉE À ÊTRE DURCIE, ÉLÉMENT DURCI ET PROCÉDÉ DE FABRICATION DE TÔLE D'ACIER DESTINÉE À ÊTRE DURCIE
Publication
Application
Priority
- JP 2016037635 A 20160229
- JP 2016207673 A 20161024
- JP 2017002186 W 20170123
Abstract (en)
[origin: EP3421631A1] An aspect of the present invention is a steel sheet for quench hardening, satisfying a prescribed composition and having a Mn concentration satisfying the formula (1): S1 + S2 < -10 × [Mn] + 44 (1), where [Mn] is Mn concentration in a steel sheet analyzed by inductively coupled plasma emission spectrography (% by mass); S1 is an area % of the region where the Mn concentration analyzed by an electron beam microprobe analyzer in the structure at a position of 1/4 of the steel sheet thickness is two times or more the [Mn]; and S2 is an area % of the region where the Mn concentration analyzed by an electron beam microprobe analyzer in the structure at a position of 1/4 of the steel sheet thickness is 0.5 times or less the [Mn].
IPC 8 full level
C22C 38/00 (2006.01); C21D 1/18 (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 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/38 (2006.01)
CPC (source: EP KR US)
C21D 1/18 (2013.01 - EP US); C21D 6/005 (2013.01 - EP US); C21D 6/008 (2013.01 - EP US); C21D 8/0205 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP KR US); C21D 8/0263 (2013.01 - EP KR US); C21D 9/46 (2013.01 - EP KR US); C22C 38/001 (2013.01 - EP KR US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP KR US); C22C 38/04 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C22C 38/12 (2013.01 - EP US); C22C 38/14 (2013.01 - EP KR US); C22C 38/28 (2013.01 - EP US); C22C 38/32 (2013.01 - EP US); C21D 2211/001 (2013.01 - US)
Citation (search report)
- [X] EP 2824196 A1 20150114 - KOBE STEEL LTD [JP]
- [X] WO 2015141097 A1 20150924 - KOBE STEEL LTD [JP]
- [X] EP 2824204 A1 20150114 - KOBE STEEL LTD [JP]
- [X] JP 2013185247 A 20130919 - KOBE STEEL LTD
- [A] EP 2832884 A1 20150204 - KOBE STEEL LTD [JP], et al
- [A] EP 2757171 A1 20140723 - JFE STEEL CORP [JP]
- [A] EP 2821517 A1 20150107 - KOBE STEEL LTD [JP]
- See references of WO 2017149999A1
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 3421631 A1 20190102; EP 3421631 A4 20190724; BR 112018067894 A2 20190108; CA 3015966 A1 20170908; CN 108779527 A 20181109; JP 2017155329 A 20170907; KR 20180117127 A 20181026; MX 2018010347 A 20181109; US 2019017142 A1 20190117
DOCDB simple family (application)
EP 17759471 A 20170123; BR 112018067894 A 20170123; CA 3015966 A 20170123; CN 201780013823 A 20170123; JP 2016207673 A 20161024; KR 20187026939 A 20170123; MX 2018010347 A 20170123; US 201716080566 A 20170123