Method of making copper wire rod with low semi-softening temperature, method of making copper wire and copper wire

摘要

A method of making a copper wire rod with low semi-softening temperature includes melting a raw material copper to have a copper melt, adjusting concentrations of oxygen and sulfur included in the copper melt to be not more than 20 ppm and not more than 6 ppm, respectively, continuously casting the adjusted copper melt at temperature not higher than 1120° C. to have a cast bar, and hot-rolling the cast bar in a temperature range of 850° C. to 550° C.