Method and apparatus for producing copper clad steel wire

摘要

A method of producing a copper clad steel wire, which comprises the steps of preparing a 5 to 15 mm diameter steel rod and a 21 to 66.7 mm width copper tape; continuously supplying the steel rod and the copper tape separately and cleaning the surfaces thereof; forming the copper tape in tubular form such that the copper tape can cover the steel rod while supplying the steel rod and the copper tape in parallel, and welding the edges of the copper tape in a non-oxidizing atmosphere; sinking the tubular copper tape sufficiently for the copper tape to substantially come into contact with the steel rod to form a copper clad steel rod; cold-drawing the copper clad steel rod and/or hot working the clad rod at a temperature of 400 DEG to 800 DEG C. to reduce its cross-sectional area by more than 20%; and then annealing the copper clad steel rod at a temperature of 300 DEG to 1050 DEG C.