Rolling part and power transmission part
AssigneeNtn Corporation
InventorsKikuo Maeda, Yukio Fujii
Life of this patent
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Abstract
There can be obtained a rolling part and power transmission part excluding any expensive elements as its constituents and formed of inexpensive elements C, Si and Mn optimized to allow the same to have a long rolling life under severe conditions for use and be inexpensive and excellent in workability. It is formed of steel shaped and thus processed, and containing 0.5 to 0.7% by weight of C, 0.6 to 1.2% by weight of Si and 0.6 to 1.0% by weight of Mn, as represented in percentage, to satisfy: L≧5000 (1), wherein L=11271 (C wt %)+5796 (Si wt %)+2665 (Mn wt %)−6955; and 23≦H≦25 (2), wherein H=48.0 (C wt %)+5.7 (Si wt %)+11.5 (Mn wt %)−16.2.
Claims11
A rolling part formed of steel containing 0.5 to 0.8% by weight of C, 0.5 to 1.2% by weight of Si and 0.3 to 1.3% by weight of Mn and having a surface hardness of no less than HRC 59.
A rolling part formed of steel shaped and thus processed, at least containing as alloy elements 0.5 to 0.7% by weight of C, 0.6 to 1.2% by weight of Si and 0.6 to 1.0% by weight of Mn, as represented in percentage, to satisfy:
- L≧5000 (1),
- wherein L=11271 (C wt %)+5796 (Si wt %)+2665 (Mn wt %)−6955;
- and
- 23<H<25 (2),
- wherein H=48.0 (C wt %)+5.7 (Si wt %)+11.5 (Mn wt %)−16.2.
Dependencies are inferred from the claim text.