Highly corrosion-resistant stainless steel component and method of manufacturing same, method of heat-treating stainless steel component, and rolling bearing and method for manufacturing same

Abstract

To provide a highly corrosion-resistant stainless steel component made of martensitic stainless steel achieving both high corrosion resistance and high hardness without containing ferrite at a surface layer portion. The highly corrosion-resistant stainless steel component is made of martensitic stainless steel containing, by weight, from 0.35 to 0.43% of C, 0.5% or less of Si, 0.5% or less of Mn, 0.04% or less of P, 0.04% or less of S, from 15 to 17% of Cr, from 0.1 to 0.3% of W, from 1.5 to 3.0% of Mo, from 0.001 to 0.005% of B, and from 0.12 to 0.18% of N, with the balance being Fe and an inevitable impurity. The matrix structure of the surface layer portion of the entire outer surface is a two-phase mixed structure containing retained austenite and martensite, and the surface hardness is HRC 57 or more.

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