HIGH STRENGTH STAINLESS STEEL WIRE EXCELLENT IN DUCTILITY-TOUGHNESS AND MODULUS OF RIGIDITY AND METHOD FOR PRODUCTION THEREOF

摘要

A high strength stainless steel wire excellent in ductility-toughness and modulus of rigidity, which has a chemical composition, in mass %, C: 0.03 to 0.14 %, Si: 0.1 to 4.0 %, Mn: 0.1 to 5.0 %, Ni: 5.0 to 9.0 %, Cr: 14.0 to 19.0 %, N: 0.005 to 0.20 %, O: 0.001 to 0.01 %, S: 0.0001 to 0.012 % and balance: Fe and inevitable impurities, provided that the value of (2C + N) is 0.17 to 0.32 %, that the value of Ni equivalent of the following formula (1): Ni equivalent (%) = Ni + 0.65Cr + 0.98Mo + 1.06Mn + 0.35Si + 12.6(C + N) (1) is 20 to 24, and that H <= 4 ppm. The production of the high strength stainless steel wire is achieved through the control of the amounts of basic components, oxygen, hydrogen and sulfur as mentioned above, the formation of finer crystal grains, and the toughness improving effect of ausforming by cold wire drawing.