HIGH STRENGTH STAINLESS STEEL WIRE ROPE EXCELLENT IN FATIGUE RESISTANCE AND CORROSION RESISTANCE AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To produce a wire rope having respectively specified average crystalline grain size in cross-sectional direction and tensile strength by specifying the composition and manufacturing method of a stainless steel wire rope, respectively. ;SOLUTION: A wire rod, in as-hot-rolled state or after heat treatment, having a composition which consists of, by weight, ≤0.12% C, 0.1-1.5% Si, 0.1-1.5% Mn, ≤0.03% P, ≤0.01% S, 3.5-8.0% Ni, 20.0-28.0% Cr, 0.1-3.0% Mo, 0.10-0.30% N, and the balance Fe and in which the value of G1, represented by the equation, G1=0.67Ni+20C+20N+0.34Mn+0.4Cr+0.4Mo+0.6Si+3, is regulated to -1 to 2(%) is used. This wire rod is subjected to wire drawing at ≥50% reduction of area, to heat treatment at 1,000-1,150°C, successively to wire drawing at 80-95% reduction of area, and then to stranding. By this method, the wire rope, having ≤5μ average crystalline grain size in cross-sectional direction and ≥1,500N/mm² tensile strength, can be obtained.;COPYRIGHT: (C)1997,JPO