STEEL
To provide a steel that has improved machinability and is processed into a bearing component to have improved surface-starting peeling life and morphological stability.SOLUTION: The present invention pertains to a steel whose chemical composition includes, in mass%, C: 0.50-0.80%, Si: 0.30-1.50%, Mn...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To provide a steel that has improved machinability and is processed into a bearing component to have improved surface-starting peeling life and morphological stability.SOLUTION: The present invention pertains to a steel whose chemical composition includes, in mass%, C: 0.50-0.80%, Si: 0.30-1.50%, Mn: 0.20-0.40%, Cr: 0.30-1.25%, Mo: 0.10-0.30%, V: 0.20-0.40%, Al: 0.005-0.100%, Ca: 0.0002-0.0010%, P: 0.020% or less, S: 0.005% or less, N: 0.0300% or less, and O: 0.0015% or less, with the balance being Fe and impurities. The steel satisfies formula (1) to formula (3). 1.20 |
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