| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To obtain a wire rod having excellent wire drawability, and to provide a steel wire using the same as the stock under high productivity in a high yield and at a low cost. <P>SOLUTION: The wire rod for a high strength steel wire having excellent ductility comprises components of, by mass, 0.95 to 1.30% C, 0.1 to 1.5% Si, 0.1 to 1.0% Mn,≤0.1% Al,≤0.1% Ti, 10 to 50 mass ppm N and 10 to 40 ppm O, and the balance Fe with impurities, wherein, the area ratio of a pearlitic structure is≥97%, and the balance bainite, pseudo-pearlite, ferrite, grain boundary ferrite and pro-eutectoid cementite. The area ratio of the pro-eutectoid cementite in the region of 100μm of the radius in the central part of the wire rod is≤0.5%, and also, the area ratio of the pro-eutectoid cementite in the region of a depth to 50μm from the surface layer of the wire rod is≤0.5%. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
