Alloys or metallic compositions – Ferrous – Chromium containing – but less than 9 percent
Patent
1996-11-01
1998-08-04
Yee, Deborah
Alloys or metallic compositions
Ferrous
Chromium containing, but less than 9 percent
420110, 148333, 148906, C22C 3806, C22C 3826
Patent
active
057889236
ABSTRACT:
A bearing steel is provided which can satisfy bearing property requirements and, at the same time, is improved in mechanical properties, such as impact, crushing, and transverse properties, while reducing the cost of materials and the cost of heat treatment for the production of a bearing. The bearing steel comprises by weight C: 0.70 to 0.93%, Si: 0.15 to 0.50%, Mn: 0.50 to 1.10%, Cr: 0.30 to 0.65%, and N: 0.005 to 0.02% with the balance consisting of Fe and unavoidable impurities and 0.4.ltoreq.Cr/C.ltoreq.0.7, the steel further comprising at least one of (1) Al: 0.01 to 0.1% with Al.times.N.gtoreq.0.00015 and (2) Nb: 0.02 to 0.1%. A rolling bearing produced from the bearing steel is also provided.
REFERENCES:
patent: 4889567 (1989-12-01), Fujiwara et al.
patent: 4904094 (1990-02-01), Furumura et al.
Hamada Kaneaki
Hayashi Ryoji
Murakami Yasuo
NSK Ltd.
Sanyo Special Steel Co., Ltd.
Yee Deborah
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