Electrode roll for electric resistance welding

摘要

An electrode roll for electric resistance welding which contains a stator member at least partly made of Cu or Cu alloy, a rotor member at least partly made of Cu or Cu alloy and rotatably mounted on the stator member, and a fusible alloy mainly composed of gallium and filling as a conductive medium an annular gap between the stator and rotor members, and portions of those two members facing the gap and being made of Cu or Cu alloy are covered by an alloy layer containing Co and W in weight proportions of 90:10 to 30:70.