| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat-treated article having excellent fatigue strength in both of the ground part and non-ground part, and to provide a heat treatment method for obtaining the heat-treated article. SOLUTION: A steel is subjected to carbonitriding treatment at 780 to 900°C. The steel subjected to the carbonitriding treatment is subjected to heating diffusion treatment at 780 to 900°C in a nitrogen-free atmosphere. The steel after being subjected to the heating diffusion treatment is quenched. COPYRIGHT: (C)2006,JPO&NCIPI
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