Study on the limited hardenability steel
Conference
·
OSTI ID:316177
- Shanghgai Univ. (China). Dept. Material Sciences and Engineering
- Shanghai No. 5 Steel Co., Ltd. (China)
A series of measurements were taken in the limited hardenability bearing steel rings which were induction hardened and tempered. Measurements showed several features which strengthened the rings: (1) Compressive residual stress are generated from surface to a depth of 3.2 mm and high residual compressive stress at the location where fatigue fracture initiates. (2) The matrix of the hardened layer was composed mainly of lath martensite with dispersed carbides whose formula was Me{sub 3} according to the X-ray spectrum analysis. The carbon content of martensite was estimated to be lower than 0.58% (by weight). The core was constituted of troostite transformed from spheroidal carbide. (3) The amount of retained austenite in the hardened layer was about 5% (in volume) which ensures the high dimensional stability of bearing.
- OSTI ID:
- 316177
- Report Number(s):
- CONF-9611259--; ISBN 0-8031-2421-X
- Country of Publication:
- United States
- Language:
- English
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