EP 2180073 A1 20100428 - MARAGING STEEL FOR METALLIC BELT
Title (en)
MARAGING STEEL FOR METALLIC BELT
Title (de)
MARAGING STAHL FÜR METALLBAND
Title (fr)
ACIER MARAGING POUR COURROIE MÉTALLIQUE
Publication
Application
Priority
JP 2007063832 W 20070711
Abstract (en)
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)
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
Designated extension state (EPC)
AL BA HR MK RS
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