| 摘要 |
PROBLEM TO BE SOLVED: To provide steel wire and spring, obtained by means of wire drawing without quench-and-temper treatment and excellent in heat resistance and fatigue strength, and their production. SOLUTION: This steel wire is constituted of a steel wire containing, by mass, 0.8-1.0% C and 0.8-1.5% Si and having a pearlitic structure. Further, in the cross section of the steel wire, the mean of hardness in the part between the surface and a position at a depth of 100μm from the surface is higher than the mean of hardness in the inner part by >=50 by Vickers microhardness. This steel wire can be obtained by subjecting a steel wire with the above chemical components and structure to shaving, to patenting, to wire drawing, to stress relief annealing at 350-450 deg.C, and then to shot peening.
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