Patent ID: 6475309
Filing Date: 2002-11-05
Classification: C21D,Y10S

Abstract:
Method for producing a 1C-1.5 Cr steel roller bearing ring, comprising:providing a tube blank having ferritic matrix structure; cold rolling the tube with a deformation of at least 30% at a temperature below 700Â° C.; separating said tube into rings; austenizing said rings; and quenching said rings, such that a bainitic structure results; wherein the steel rolling bearing ring produced by the method comprises, in weight %: 0.85-1.10 carbon, 0.005-0.6 silicon, 0.005-0.80 manganese, 1.25-2.05 chromium, 0.35 max nickel, 0.36 max molybdenum, and balance Fe and usual impurities.