The processed being induced die martensite type steel for the belt of power transmission which possesses high hardness high fatigue strength and the band steel null mass which uses

摘要

PROBLEM TO BE SOLVED: To provide a strain-induced martensitic steel having high hardness and high fatigue strength and a steel strip composed of the strain-induced martensitic steel.;SOLUTION: The strain-induced martensitic steel with high hardness and high fatigue strength has a composition which consists of, by mass, 0.01-0.10% C, ≤3.0% Si, 5.0-10.0% Mn, 1.0-12.0% Ni, 4-18% Cr, either or both of Mo and W in amounts within the range satisfying Mo+1/2W=0.1 to 4.0%, ≤5.0% (including 0%) Cu, ≤0.15% (including 0%) N, ≤0.10% Al, ≤0.005% O and the balance essentially Fe and in which the value of A represented by equation A=Ni+0.65Cr+0.98Mo+0.49W+1.05Mn+0.35Si+Cu+12.6(C+N) (where unadded elements among selective elements are figured as zero) is regulated to 13-27%. Further, this steel has a structure containing ≥30 vol.% martensitic phase in austenite after cold working.;COPYRIGHT: (C)2001,JPO