| 摘要 |
PROBLEM TO BE SOLVED: To provide high fatigue strength and high rigidity steel which not only has the remarkable improvement of rigidity, but also has strength, in particular, fatigue strength by a relatively inexpensive melting method, and to provide a production method therefor. SOLUTION: The melted high rigidity steel is obtained by dispersing a compound having a Young's modulus of >=300 GPa into a matrix consisting of iron or an iron alloy. The Vickers hardness at a depth position of 100μm from the surface of the high rigidity steel is >=600, and, further, the Vickers hardness at a depth position of >=1 mm from the surface is <450.
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