| 摘要 |
PURPOSE: A high-strength and high-Mn steel wire rod with excellent cold forging property, a manufacturing method thereof, and a bolt manufacturing method using the same are provided to reduce the weight of parts by excluding a heat treatment process and utilizing the steel wire rod for the parts. CONSTITUTION: A method for manufacturing a high-strength and high-Mn steel wire rod with excellent cold forging property comprises the steps of: heating steel including Mn of 12-25wt.% to 1100-1250°C, hot rolling the heated steel at 700-1100°C, cooling the hot rolled steel below 200°C, and cold caliber-rolling or drawing the steel into a steel wire rod. [Reference numerals] (AA) Temperature(°C); (BB) 1200°C heating; (CC) 1100°C hot rolling; (DD) Cold caliber-rolling or drawing; (EE) Time(t) |
