Wire rod, production mannered null 0.90 - 1.30 mass

摘要

The present invention, C and 0.90 to 1.30% by weight; 0 0.1% by weight, more than; and Mn of 0.1 to 1.0% by weight; and Si of 0.1 to 1.2 mass% and inevitable impurities Fe; O and 10~40ppm; N and 10~60ppm; S and 0 to 0.02% by weight; and P of 0 to 0.02% by weight; Al and .6% by weight less than the remainder containing; A wire including at least the area of ​​97% or more of the vertical cross section, is occupied by the pearlite structure to the longitudinal direction of the wire, 0.5% of the central region of the cross section I provide the wire and the area, the area of ​​less than 0.5% of the surface area of ​​the first cross section is occupied by pro-eutectoid cementite structure.