THIN MARTENSITIC STAINLESS STEEL SHEET, METHOD FOR PRODUCING SAME, AND METHOD FOR PRODUCING THIN COMPONENT

摘要

Provided are: a thin martensitic stainless steel sheet which enables the entire of a thin component after quenching and tempering to have high hardness, while having excellent corrosion resistance; and a method for producing this thin martensitic stainless steel sheet. Also provided is a method for producing a thin component. A thin martensitic stainless steel sheet according to the present invention has a thickness of 0.1 mm or less, while having a component composition that contains, in mass%, 0.25-0.45% of C, 1.0% or less of Si, 0.1-1.5% of Mn, 12.0-15.0% of Cr, 0.5-3.0% of Mo and 0.30-0.45% of N, with the balance being made up of Fe and impurities. This thin martensitic stainless steel sheet is configured such that the number density of carbides having a circle-equivalent diameter of 0.5 μm or more in a cross-sectional structure is 0-50 carbides/1,000 μm². The present invention also provides: a method for producing this thin martensitic stainless steel sheet; and a method for producing a thin component, in which this thin martensitic stainless steel sheet is subjected to quenching and tempering.