PROCESS FOR PRODUCING GRAIN-REFINED MARTENSITIC STAINLESS STEEL AND CUTTING TOOL USING THE STAINLESS STEEL

摘要

PROBLEM TO BE SOLVED: To provide a process for producing a grain-refined martensitic stainless steel which has high strength and high corrosion resistance and is suitably used for manufacturing electric razors, hair clippers, etc., requiring sharp cutting edges, and a cutting tool using this stainless steel.;SOLUTION: A base material based on a composition of SUS420J2 is prepared, subjected to at least one process chosen from a high-density dislocation generation process and rapid solidification process, and further annealed to obtain a ferrite steel with fine metallic structure. Next, the ferrite steel is cold rolled, annealed, subjected to plastic working to yield a cutting tool of a predetermined shape, and further quenched to obtain the grain-refined martensitic stainless steel. By sharpening it through grinding/polishing, the cutting tool made of the grain-refined martensitic stainless steel can be obtained.;COPYRIGHT: (C)2004,JPO