Patent ID: 8596333

Claim:
A method of making a low-oxygen copper wire rod with a low semi-softening temperature, said method comprising: melting a raw material copper to have a copper melt; adjusting concentrations of oxygen included in the copper melt and sulfur included in the copper melt such that the concentration of the sulfur to be not more than 6 ppm without adding any other metals; continuously casting the adjusted copper melt having a composition with an oxygen concentration more than 10 ppm and not more than 20 ppm, a sulfur concentration not more than 6 ppm, and a balance of copper and inevitable impurities at a 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., wherein the temperature range comprises a rolling initiation temperature of 850° C. and a rolling termination temperature of 550° C.