To improve the antiwear properties of shearer shoes under dry sliding condition,the copper and cerium were permeated into the surface of 18Cr2Ni4W alloyed steel for shearer shoes by using double glow discharge plasma surface alloying technique.The tribological properties of the alloyed alloys permeated copper and cerium were investigated on a ringonblock test rig with varying applied load and sliding speed under dry sliding condition.As comparison,the tribological properties of 45 steel and 18Cr2Ni4W steel were tested at the same testing conditions.The results show that the alloyed alloys permeated copper and cerium show the lowest the wear rate and friction coefficient under different sliding speeds and normal loads,while the 45 steel keeps the highest friction coefficient and wear rate,indicating that the friction reducing and antiwear properties of 18Cr2Ni4W alloyed steel are improved by permeating copper and cerium in the surface of 18Cr2Ni4W alloyed steel.During the sliding process,the wear mechanism of 45 steel is ploughing and adhesive wear,the wear mechanism of 18Cr2Ni4W alloyed steel is the ploughing and slight adhesive wear,while the alloyed alloys permeated copper and cerium show the ploughing and slight spalling