The material of steel wire which has excellent properties of high strength cold stretching, and steel wire of high strength

摘要

Summary "material of steel wire of high strength which has excellent properties for cold stretching, and steel wire of high strength" are provided: a technique with which the cooling air jet can be used to produce, with excellent productivity, and a material Steel wire for high strength capable of achieving a high uniform hardness and high ductility.Even when the cold stretched; a steel wire for high strength produced from this material of steel wire of high strength; and a steel wire for high strength galvanized steel.This material of steel wire of high strength respectively includes 0.80 to 1,3% C, 0.1 to 1.5% Si, 0.1 to 1.5% of Mn, more than 0% but not more than 0.03% P, more than 0% but not more than 0.03% s, 0.0005 to 0.01% B, 0.01 to 0.10% Al, and 0.001 0.006% of N, The remaining with iron and impurities inevitable preendendo.The reason of area of Pearlite on the estrutu Ra of the material of steel wire of high strength is not less than 90%. The number of Ta - manho of medium grain (pave) of nodules of pearlite and the standard deviation (PS) of the same respectively satisfies the formula (1), that is, 7.0 = pave = 10.0, and the formula (2), that is, PS = 0.6.