High Temperature Wear Performance of H13 Steel Laser Coating

The H13 steel was selected for laser coating to obtain a laser cladding coating,and the microstructure and hardness were analyzed.The high temperature wear behavior of H13 steel coating was studied by pin-plate high temperature wear tester and compared with H13 steel substrate.The morphology,phase and composition of the ground surface were analyzed by microscopic analysis methods such as SEM,XRD and EDS,and the wear mechanism was discussed.The results show that under the same load condition,when the temperature is raised from 400℃ to 600℃,the grinding loss of the coating is significantly lower than that of H13 steel.When the temperature is 600℃ and the load is 150 N,the grinding loss of H13 steel is more serious.Plastic extrusion occurs on the worn surface,and the grinding loss increases,and the wear loss of the coating is much smaller than that of the H13 steel,indicating that the coating exhibits good wear resistance at high temperatures.At the same temperature,the wear loss of the coating and H13 steel increases with increasing load.At 400℃ and 50 N load,the wear mechanism of H13 steel and coating is slight wear,at 400℃ and 150 N load,the wear mechanism of H13 steel is oxidative wear,and the wear mechanism of the coating is slight wear,however,at 600℃ and 50 N load the wear mechanism of H13 steel is oxidative wear,while the wear mechanism of the coating is abrasive wear.At 600℃ and 150 N load,the wear mechanism of H13 steel is plastic deformation,and the wear mechanism of the coating is abrasive wear.