Patent ID: 6403026
Filing Date: 2002-06-11
Classification: C21D,C22C,F16C,Y10S

Abstract:
Steel for components for bearings whose chemical composition comprises, by weight based on total weight:0.9%&lE;C&lE;1.5% 0.4%&lE;Mn&lE;1.5% 0.75%&lE;Si&lE;2.5% 0.2&lE;Cr&lE;2% 0%&lE;Ni&lE;0.5% 0%&lE;Mo&lE;0.2% 0%&lE;Al<0.05% S&lE;0.04% iron and impurities resulting from smelting, the composition furthermore satisfying the relationships:Mn&lE;0.75+0.55Ã—Si Mn&lE;2.5âˆ’0.8Ã—Si said component having a structure consisting of a network of carbides, martensite and from 5% to 30% of residual austenite.