EP 2418296 A4 20170517 - STEEL FOR CASE HARDENING WHICH HAS EXCELLENT COLD WORKABILITY AND MACHINABILITY AND WHICH EXHIBITS EXCELLENT FATIGUE CHARACTERISTICS AFTER CARBURIZING AND QUENCHING, AND PROCESS FOR PRODUCTION OF SAME
Title (en)
STEEL FOR CASE HARDENING WHICH HAS EXCELLENT COLD WORKABILITY AND MACHINABILITY AND WHICH EXHIBITS EXCELLENT FATIGUE CHARACTERISTICS AFTER CARBURIZING AND QUENCHING, AND PROCESS FOR PRODUCTION OF SAME
Title (de)
STAHL ZUM EINSATZHÄRTEN MIT HERVORRAGENDER KALTUMFORMBARKEIT UND ZERSPANBARKEIT UND HERVORRAGENDEN ERMÜDUNGSEIGENSCHAFTEN NACH AUFKOHLUNG UND ABSCHRECKUNG UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
ACIER POUR DURCISSEMENT SUPERFICIEL QUI PRÉSENTE UNE EXCELLENTE APTITUDE AU FAÇONNAGE À FROID ET UNE EXCELLENTE APTITUDE À L'USINAGE ET QUI PRÉSENTE D'EXCELLENTES CARACTÉRISTIQUES À LA FATIGUE APRÈS CÉMENTATION AU CARBONE ET TREMPE, ET SON PROCÉDÉ DE FABRICATION
Publication
Application
Priority
- JP 2009068083 W 20091014
- JP 2009092176 A 20090406
Abstract (en)
[origin: EP2418296A1] Cold worked, machined, and carburized quenched case-hardened steel prevented from formation of coarse grains, that is, case-hardened steel superior in cold workability, machinability, and fatigue characteristics after carburized quenching characterized by limiting, by mass%, S: 0.001 to 0.15%, Ti: 0.05 to 0.2%, Al: 0.04% or less, and N: 0.0050% or less, containing other specific ingredients in specific ranges, furthermore containing one or more of Mg: 0.003% or less, Zr: 0.01% or less, and Ca: 0.005% or less, limiting the amount of precipitation of AlN to 0.01% or less, and having a density d (/mm 2 ) of sulfides with a equivalent circle diameter of over 20 µm and an aspect ratio of over 3 and a content of S [S] (mass%) satisfying d‰¤1700[S]+20.
IPC 8 full level
C22C 38/00 (2006.01); C21D 1/06 (2006.01); C21D 8/02 (2006.01); C21D 8/06 (2006.01); C22C 1/00 (2006.01); C22C 38/60 (2006.01); C23C 8/02 (2006.01); C23C 8/22 (2006.01); C23C 8/32 (2006.01)
CPC (source: EP KR US)
C21D 1/06 (2013.01 - EP KR US); C21D 8/0226 (2013.01 - EP KR US); C22C 1/02 (2013.01 - EP KR US); C22C 1/11 (2023.01 - EP KR US); C22C 38/00 (2013.01 - US); C22C 38/001 (2013.01 - EP); C22C 38/002 (2013.01 - EP KR); C22C 38/02 (2013.01 - EP KR); C22C 38/04 (2013.01 - EP); C22C 38/06 (2013.01 - EP); C22C 38/22 (2013.01 - EP); C22C 38/24 (2013.01 - EP); C22C 38/26 (2013.01 - EP); C22C 38/28 (2013.01 - EP KR); C22C 38/32 (2013.01 - EP); C22C 38/38 (2013.01 - EP KR); C22C 38/46 (2013.01 - EP); C22C 38/48 (2013.01 - EP); C23C 8/32 (2013.01 - EP US); C23C 8/80 (2013.01 - EP US)
Citation (search report)
- [I] JP 2002069573 A 20020308 - NIPPON STEEL CORP
- [IA] JP H11236646 A 19990831 - SUMITOMO METAL IND
- [A] JP 2005220423 A 20050818 - KOBE STEEL LTD
- [A] JP 2007031787 A 20070208 - KOBE STEEL LTD
- See references of WO 2010116555A1
Designated contracting state (EPC)
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 SE SI SK SM TR
DOCDB simple family (publication)
EP 2418296 A1 20120215; EP 2418296 A4 20170517; EP 2418296 B1 20200226; AU 2009343864 A1 20110929; AU 2009343864 B2 20121018; BR PI0925071 A2 20150721; BR PI0925071 B1 20210504; CA 2757393 A1 20101014; CA 2757393 C 20151006; CN 102378822 A 20120314; CN 102378822 B 20140514; KR 101367350 B1 20140226; KR 20110117261 A 20111026; US 2012018063 A1 20120126; WO 2010116555 A1 20101014
DOCDB simple family (application)
EP 09843061 A 20091014; AU 2009343864 A 20091014; BR PI0925071 A 20091014; CA 2757393 A 20091014; CN 200980158459 A 20091014; JP 2009068083 W 20091014; KR 20117021886 A 20091014; US 200913138837 A 20091014