| 摘要 |
A wire material comprising at least 0.90 to 1.30 mass% of C, 0.1 to 1.2 mass% of Si, 0.1 to 1.0 mass% of Mn, 0.1 to 0.6 mass% exclusive of Al, 0 to 0.02 mass% of P, 0 to 0.02 mass% of S, 10 to 60 ppm of N, and 10 to 40 ppm of O, with the remainder being Fe and unavoidable impurities, wherein a pearlite structure comprises 97% or more of the surface area of a cross-section surface perpendicular to the lengthwise direction of the wire material, and a pro-eutectoid cementite structure comprises 0.5% or less of the center region of the cross-section surface and also comprises 0.5% or less of a first surface layer region of the cross-section surface. |
