High-conductivity copper-clad steel trolley wire and a method for manufacturing the same

Abstract From the Canadian patent

First, a steel wire is continuously dipping in molten copper or molten copper alloy so that copper or copper alloy builds up and solidifies on the peripheral surface of said steel wire, thereby obtaining an initial copper-clad steel wire. Then, the initial copper-clad steel wire is subjected a first cycle of hot rolling by a caliber roll. The hot-rolled wire is dipped in molten copper or molten copper-alloy at least once so that copper or copper alloy builds up and solidifies thereon thereby obtaining a final copper-clad steel wire. The final copper-clad steel wire is hot-rolled at a temperature of 750 to 850°C and with a rolling ratio of 10 to 40%. Then, the hot-rolled wire is cold-rolled …