| 摘要 |
PROBLEM TO BE SOLVED: To produce a metallic member in which fine and hard carbides are uniformly distributed and excellent in toughness and wear resistance and to provide a method for producing it. SOLUTION: In a steel sheet of <=5 mm thickness or a fine wire of <=6 mm diameter formed by a steel contg., by weight, <=0.30% C, <=0.50% Si, <=0.50% Mn, one or two kinds of Mo and W so as to satisfy Weq: 10.0 to 24.0, where Weq = 2Mo+W, 2.0 to 10.0% V, and the balance Fe with inevitable impurities, MC and M6 C type carbides or MCN and M6 CN type nitrides of <5μm maximum particle size are contained in a carburized layer or a carbonitrided layer after carburizing or carbonitriding, and the matrix structure after ordinary heat treatment or carburizing and quenching is composed of martensite.
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