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|1. (WO2018066666) NITRIDED COMPONENT AND METHOD FOR PRODUCING SAME|
|Applicants:||NIPPON STEEL & SUMITOMO METAL CORPORATION
|Title:||NITRIDED COMPONENT AND METHOD FOR PRODUCING SAME|
This nitrided component exhibits excellent rotating bending fatigue strength in addition to surface fatigue strength, and is characterized in that: a steel material having a prescribed chemical composition is used as the material therefor; a compound layer which contains iron, nitrogen and carbon and has a thickness no less than 3μm and less than 20μm is formed on the surface of the steel material; the phase structure of the compound layer in the range from the surface to a depth of 5μm contains a γ' phase in an amount equal to or greater than 50% by area ratio; the void area ratio in the range from the surface to a depth of 3μm is less than 1%; and the compressive residual stress at the compound layer surface is 500MPa or more.