EP 2180073 A4 20110406 - MARAGING STEEL AND MARAGING STEEL FOR METALLIC BELT
Title (en)
MARAGING STEEL AND MARAGING STEEL FOR METALLIC BELT
Title (de)
MARTENSITAUSHÄRTENDER STAHL UND MARTENSITAUSHÄRTENDER STAHL FÜR METALLBAND
Title (fr)
ACIER VIEILLI THERMIQUEMENT ET ACIER VIEILLI THERMIQUEMENT POUR COURROIE MÉTALLIQUE
Publication
Application
Priority
JP 2007063832 W 20070711
Abstract (en)
[origin: EP2180073A1] A maraging steel for metallic belts which has a composition capable of being reduced in the content of TiN serving as a starting point for fatigue fracture in a high-cycle-rate region. The composition facilitates nitriding to heighten the surface hardness. The steel has a nitrided surface layer having increased compressive residual stress and hence improved flexural fatigue strength. In the steel, former austenite crystal grains have been reduced in size in order to secure higher strength and higher ductility. The maraging steel consists of, by mass%, up to 0.01% C, up to 0.1% Si, up to 0.1% Mn, up to 0.01% P, up to 0.005% S, 17.0-22.0% Ni, 0.1-4.0% Cr, 3.0-7.0% Mo, from more than 7.0 to 20.0% Co, up to 0.1% Ti, up to 2.5% Al, up to 0.03% N, up to 0.005% O, up to 0.01% B (exclusive zero), and the balance of Fe and unavoidable impurities, wherein Co/3+Mo+4Al is 8.0-15.0%.
IPC 8 full level
C22C 38/00 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP KR US)
C22C 38/001 (2013.01 - EP KR US); C22C 38/002 (2013.01 - EP KR US); C22C 38/004 (2013.01 - EP KR US); C22C 38/06 (2013.01 - EP KR US); C22C 38/44 (2013.01 - EP KR US); C22C 38/50 (2013.01 - EP KR US); C22C 38/52 (2013.01 - EP KR US); C22C 38/54 (2013.01 - EP KR US)
Citation (search report)
- [Y] JP 2000345302 A 20001212 - HITACHI METALS LTD
- [Y] US 2001006081 A1 20010705 - UEHARA TOSHIHIRO [JP], et al
- [Y] JP 2001131710 A 20010515 - HITACHI METALS LTD
- [A] US 2002059967 A1 20020523 - COUTU LUCIEN [GB]
- [A] JP H02285053 A 19901122 - HITACHI METALS LTD
- [A] JP H01142052 A 19890602 - SUMITOMO METAL IND
- See references of WO 2009008071A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2180073 A1 20100428; EP 2180073 A4 20110406; EP 2180073 B1 20130911; CN 101688271 A 20100331; CN 101688271 B 20130327; KR 20100011991 A 20100203; KR 20120078757 A 20120710; US 2010189590 A1 20100729; WO 2009008071 A1 20090115
DOCDB simple family (application)
EP 07790636 A 20070711; CN 200780053748 A 20070711; JP 2007063832 W 20070711; KR 20097027091 A 20070711; KR 20127017064 A 20070711; US 66858310 A 20100111