Manufacturing method of fine steel wire rod for fine wire with excellent tensile strength and drawing property

摘要

The present invention relates to a method for producing a mild steel wire used by drawing a fine wire such as a clip, a pin, a staple needle, etc .; The purpose of the present invention is to provide a method for producing a fine steel wire rod for fine wire having excellent tensile strength characteristics and drawability by controlling the grain refining rolling using TiC precipitation and the rolling conditions for precipitation strengthening of TiC.;In the present invention for achieving the above object, in the method for producing a mild steel wire rod for thin wire,;By weight%, carbon (C): 0.01% or less, silicon (Si): 0.02% or less, manganese (Mn): 0.15% or less, phosphorus (P): 0.015% or less, sulfur (S): 0.015% or less, titanium (Ti): The steel sheet (Billet) composed of 0.045% or less and the remaining Fe and other unavoidable impurities is heated to 950-1000 ° C and hot-pressed at the intermediate finishing rolling temperature of 750-850 ° C and the final finishing rolling temperature of 850 ° C or higher. The gist of the present invention relates to a method for producing a thin steel wire rod for fine wire, which has excellent tensile strength characteristics and drawability, including rolling of a wire rod, followed by winding and then slow cooling.