| 摘要 |
A Si-killed steel wire rod for obtaining a spring excellent in fatigue properties and a spring excellent in fatigue properties obtained from such steel wire rod are provided. The Si-killed steel wire rod of the present invention consists of Ba: 0.03-30 ppm, Al: 1-30 ppm and Si: 2-4%, C: 1.2% or below (not inclusive of 0%), Mn: 0.1-2.0% respectively, Mg and/or Ca by a range of 0.5-30 ppm in total, and optionally one or more kinds of elements selected from a group consisting of Li: 0.03-20 ppm, Cr: 0.5-3%, Ni: 0.5% or below, V: 0.5% or below, Nb: 0.1 % or below, Mo: 0.5% or below, W: 0.5% or below, Cu: 0.1% or below, Ti: 0.1% or below, Co: 0.5% or below, REM: 0.05% or below, and the balance is Fe and inevitable impurities. |
