EP 2671963 A1 20131211 - High strength large steel forging
Title (en)
High strength large steel forging
Title (de)
Grosse Stahlschmieden mit hoher festigkeit
Title (fr)
Acier de Forgeage de grande dimension et de grande tenue
Publication
Application
Priority
JP 2012129381 A 20120606
Abstract (en)
A high strength large steel forging of the present invention has highly balanced strength and toughness, and has high fatigue strength. The high strength large steel forging includes compositions that specify contents of C, Si, Mn, Ni, Cr, Mo, V, and Al, and S as an unavoidable impurity; in which the high strength large steel forging consists of a martensitic structure or a mixed structure of martensite and bainite; a grain size of prior austenite is 19 µm or more and 70µm or less; and a maximum block size of martensite is 15 µm or less and a minimum block size of martensite is 0.5 µm or more.
IPC 8 full level
C22C 38/08 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01)
CPC (source: EP KR)
C22C 38/08 (2013.01 - EP KR); C22C 38/44 (2013.01 - EP KR); C22C 38/46 (2013.01 - EP KR); C21D 2211/002 (2013.01 - KR); C21D 2211/008 (2013.01 - KR)
Citation (applicant)
- JP 2005344149 A 20051215 - KOBE STEEL LTD
- JP 3896365 B2 20070322
- JP 2010248540 A 20101104 - KOBE STEEL LTD
- JP 2000212705 A 20000802 - NIPPON STEEL CORP
- JP 2008025021 A 20080207 - KOBE STEEL LTD
- JP 2009173961 A 20090806 - KOBE STEEL LTD
- JP 2003147436 A 20030521 - NIPPON STEEL CORP, et al
Citation (search report)
- [A] JP 2010163666 A 20100729 - NIPPON STEEL CORP
- [A] EP 2141254 A1 20100106 - KOBE STEEL LTD [JP]
- [A] JP 2008111146 A 20080515 - JFE STEEL KK
- [A] EP 1602742 A1 20051207 - KOBE STEEL LTD [JP]
- [A] WO 2005121384 A2 20051222 - CHAMBERLIAN MFG CORP [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 2671963 A1 20131211; EP 2671963 B1 20141008; ES 2517523 T3 20141103; JP 2013253287 A 20131219; JP 5859384 B2 20160210; KR 101547015 B1 20150824; KR 20130137101 A 20131216; PL 2671963 T3 20150227
DOCDB simple family (application)
EP 13002083 A 20130419; ES 13002083 T 20130419; JP 2012129381 A 20120606; KR 20130064894 A 20130605; PL 13002083 T 20130419