EP 3399063 A4 20190529 - CASE-HARDENED STEEL, CARBURIZED COMPONENT, AND PROCESS FOR PRODUCING CASE-HARDENED STEEL
Title (en)
CASE-HARDENED STEEL, CARBURIZED COMPONENT, AND PROCESS FOR PRODUCING CASE-HARDENED STEEL
Title (de)
EINSATZGEHÄRTETER STAHL, AUFGEKOHLTE KOMPONENTE UND VERFAHREN ZUR HERSTELLUNG DES EINSATZGEHÄRTETEN STAHLS
Title (fr)
ACIER CÉMENTÉ, ÉLÉMENT CÉMENTÉ ET PROCÉDÉ DESTINÉ À LA PRODUCTION D'ACIER CÉMENTÉ
Publication
Application
Priority
- JP 2015256254 A 20151228
- JP 2016089086 W 20161228
Abstract (en)
[origin: EP3399063A1] A case hardening steel includes, as a chemical composition, by mass%, C: 0.10% to 0.30%, Si: 0.02% to 1.50%, Mn: 0.30% to 1.80%, S: 0.003% to 0.020%, Cr: 0.40% to 2.00%, Al: 0.005% to 0.050%, Ti: 0.06% to 0.20%, Bi: 0.0001% to 0.0050%, Mo: 0% to 1.50%, Ni: 0% to 3.50%, V: 0% to 0.50%, B: 0% to 0.0050%, Nb: 0% or more and less than 0.040%, P: limited to 0.050% or less, N: limited to 0.0060% or less, O: limited to 0.0025% or less, and a remainder including an iron and impurities, and satisfies Ti/S ‰¥ 6.0, in which, in a longitudinal section, a maximum diameter of Ti-based precipitates predicted by extreme value statistics under a condition that an inspection standard area is 100 mm 2 , a number of inspections is 16 visual fields, and an area where prediction is performed is 30,000 mm 2 , is 40 µm or less.
IPC 8 full level
C22C 38/00 (2006.01); C21D 1/06 (2006.01); C21D 8/06 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/50 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP US)
C21D 8/06 (2013.01 - EP US); C21D 8/065 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (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 38/22 (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 38/32 (2013.01 - EP US); C22C 38/44 (2013.01 - US); C22C 38/46 (2013.01 - US); C22C 38/48 (2013.01 - US); C22C 38/50 (2013.01 - EP US); C22C 38/54 (2013.01 - US); C23C 8/02 (2013.01 - EP US); C23C 8/22 (2013.01 - EP US); C23C 8/32 (2013.01 - EP US); C23C 8/34 (2013.01 - EP US); C23C 8/80 (2013.01 - EP US); C21D 1/06 (2013.01 - EP US); C21D 2211/002 (2013.01 - EP US); C21D 2211/005 (2013.01 - EP US)
Citation (search report)
- [A] JP 2010248630 A 20101104 - JFE STEEL CORP, et al
- [A] JP 2011219854 A 20111104 - JFE STEEL CORP, et al
- [A] JP 2005240175 A 20050908 - NIPPON STEEL CORP
- See references of WO 2017115842A1
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 3399063 A1 20181107; EP 3399063 A4 20190529; JP 6631640 B2 20200115; JP WO2017115842 A1 20181101; US 2019002999 A1 20190103; WO 2017115842 A1 20170706
DOCDB simple family (application)
EP 16881816 A 20161228; JP 2016089086 W 20161228; JP 2017559236 A 20161228; US 201616065455 A 20161228