Method of heat treating steel wire

摘要

Cold drawn carbon steel wire, more particularly stranded galvanized wire for use in overhead power transmission lines, is heat treated in the untensioned state for a period of at least one hour at a temperature in the range 150 DEG C.-200 DEG C. The preferred temperature is about 175 DEG C. The treated wire has a reduced susceptibility to permanent elongation under tensile stress. ACSR conductors incorporating such wire as the steel reinforcement have a greatly reduced sag under heavy ice loading.