| 摘要 |
PURPOSE: A method for manufacturing a bearing steel wire rod is provided to obtain a bearing steel wire rod with excellent durability and abrasion resistance by properly controlling the tapping temperature from a converter, the heating-up time of an LF(Ladle Furnace) process, and the molten steel circulation time of an RH(Ruhrstahl-Heraeus) process. CONSTITUTION: A method for manufacturing a bearing steel wire rod having excellent durability and abrasion resistance comprises a step of making molten steel, which comprises C of 0.9-1.4 weight%, Si of 0.15-0.25 weight%, Mn of 0.25-0.45 weight%, Cr of 1.3-1.6 weight%, P of 0.02 weight% or less, S of 0.008 weight% or less, and Fe and inevitable impurities of the remaining amount, in a converter, a step of tapping the molten steel at a temperature of 1630-1680°C, performing an LF process with a heating-up time of 10-19 minutes, performing an RH process with a molten steel circulation time of 25-35 minutes and casting the molten steel, and a step of rolling the cast billet into a wire rod. |
