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NITRIDED OR SOFT NITRIDED PART WITH EXCELLENT WEAR RESISTANCE AND PITTING RESISTANCE, AND NITRIDING AND SOFT NITRIDING METHODS
NITRIDED OR SOFT NITRIDED PART WITH EXCELLENT WEAR RESISTANCE AND PITTING RESISTANCE, AND NITRIDING AND SOFT NITRIDING METHODS
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机译:具有出色的耐磨性和抗点蚀性的氮化或软氮化零件,以及氮化和软氮化方法
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摘要
A nitrided part and soft nitrided part with excellent wear resistance and pitting resistance and a nitriding method and soft nitriding method are provided, specifically, a nitrided part or soft nitrided part made by a steel material comprising, by mass%, C: 0.05 to 0.3%, Si: 0.05 to 1.5%, Mn: 0.2 to 1.5%, P: 0.025% or less, S: 0.003 to 0.05%, Cr: 0.5 to 2.0%, Al: 0.01 to 0.05%, and N: 0.003 to 0.025% and having a balance of Fe and impurities, wherein, the surface layer comprises a compound layer containing iron, nitrogen, and carbon and a nitrogen diffusion layer positioned below the compound layer, the compound layer comprises an ε single phase, the ε single phase has a thickness of 8 to 30 µm and a Vicker's hardness of 680HV or more, and the ε single phase has a volume ratio of pores of less than 10%.
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