HYPER EUTECTOID WIRE ROD HAVING HIGH STRENGTH AND DUCTILITY AND METHOD FOR MANUFACTURING THE SAME

摘要

PURPOSE: A high-strength high-ductility hypereutectoid wire rod and a manufacturing method thereof are provided to improve both the strength and ductility of a hypereutectoid wire rod through control of components and cooling conditions. CONSTITUTION: A high-strength high-ductility hypereutectoid wire rod comprises C of 0.88-1.02 weight%, Mn of 0.3-0.8 weight%, Si of 0.4-1.0 weight%, Cr of 0.3-0.8 weight%, V of 0.05-0.18 weight%, and Fe and inevitable impurities of the remaining amount. The average size of pearlite colony in the hypereutectoid wire rod is 3.30μm or less The hypereutectoid wire rod gas a tensile strength of 1300-1450MPa and a reduction of area of 40% or greater.