Laser Surface Hardening of Frictional Pairs Made from Steel—Copper Pseudoalloy

Resumo

The microstructure and microhardness of the surface layer of annular projections on disks of steel—copper powder pseudoalloy are investigated after laser heat treatment by a 1-kW fiber laser. The maximum microhardness of 1000 HV is attained within the martensite formed in pearlite colonies of the initial steel—copper pseudoalloy. The properties of the surface layer depend not only on the laser parameters but also on the surface geometry of the samples.