The wear testing of Cu-Ag alloy for Cu cladding Al composite contact wire with the 45#steel and bronze alloy as friction pair was conducted

and the wear surface morphology of the sample at different loads and sliding speeds was observed.The results show that the main mechanisms of Cu-Ag alloy sliding wear are abrasive wear and adhesive wear.With the 45 # steel as friction pair

there exist a large amount of plastic deformation on the wear surface

and obvious furrows and cutting traces in the sliding direction occur

meanwhile

copper oxide in the wear surface is generated

which plays not only the abrasive in the process of wear but also lubrication role.With the bronze alloy as friction pair

the wear surface has serious peeling pit and adhesion

and the wear rate of bronze alloy friction pair is obviously more than steel friction pair.