HIGH STRENGTH STAINLESS STEEL WIRE EXCELLENT IN WIRE DRAWING LONGITUDINAL CRACK RESISTANCE

摘要

PROBLEM TO BE SOLVED: To suppress longitudinal cracks at the time of wire drawing in a steel wire by specifying the contents of C, Si, Mn, Ni, Cr and N in a steel and regulating the content of strain induced martensite at the time of wire drawing working while its strength is secured. ;SOLUTION: This stainless steel wire is composed of, by weight, 0.07 to 0.14% C, 0.1 to 3.0% Si, 0.1 to 3.0% Mn, 6.0 to 9.0% Ni, 15.0 to 19.0% Cr, 0.005 to 0.15% N, and the balance Fe with inevitable impurities. The value of T expressed by the formula I is regulated to 0.18 to 0.30%, the value of Md 30 expressed by the formula II is regulated to 0 to 35°C, its strength after wire drawing is regulated to ≥1900N/mm², and the content of strain induced martensite is regulated to 30 to 75%. If required, ≤0.015% P and 0.2 to 2.0% Mo are furthermore incorporated therein. Moreover, the content of hydrogen is preferably regulated to ≤1.5ppm.;COPYRIGHT: (C)1998,JPO