Bearing steel

Details Bearing steel Bearing steel

1992-12-14

1995-04-04

Yee, Deborah

Alloys or metallic compositions

Ferrous

Chromium containing, but less than 9 percent

420 83, 420 84, C22C 3846, C22C 3860

Patent

active

054035457

ABSTRACT:
A bearing steel having long rolling life comprising, by weight, 0.65 to 0.90% of C, 0.15 to 0.50% of Si, 0.15 to 1.0% of Mn and 2.0 to 5.0% of Cr, and the balance of Fe. Austenite grain size can be prevented from becoming coarser to make hardening in high temperature possible by further adding one or more of 0.0090 to 0.0200% of N, 0.010 to 0.050% of Al and 0.005 to 0.500% of Nb as optional elements to the steel. Further, rolling fatigue life can be improved by further adding one or more of 0.20 to 0.50% of Ni, 0.10 to 2.00% Of Mo and 0.05 to 1.00% of V as optional elements, and machinability can be improved by further adding one or more of 0.02 to 0.05% of S, 0.005 to 0.10% of rare earth elements, 0.02 to 0.30% of Pb, 0.0005 to 0.0100% of Ca, 0.001 to 0.200% of Bi, 0.005 to 0.20% of Se and 0.005 to 0.100% of Te in the steel as optional elements.

REFERENCES:
patent: 3929523 (1975-12-01), Kinoshi et al.
patent: 3945821 (1976-03-01), Stroup
patent: 4224060 (1980-09-01), de Souza et al.
patent: 5013525 (1991-05-01), Hamada et al.
Key to Steels, West Germany, 10 Edition 1974.

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