Abstract:
The effects of process parameters on the surface roughness, topography, residual stress and microhardness of the specimens in the surface burnishing processing of ZK60 magnesium alloy were investigated. The results show that the burnishing pressure and number of repeat burnishing have a great effect on the surface roughness, topography, residual stress and microhardness of the specimens, and the burnishing speed has little effect. Burnishing processing of ZK60 magnesium alloy specimens after turning, the surface roughness
Ra and
Rz of the specimens reduced by 50.3% and 48.1%. The residual compressive stress can reach up to 54.55 MPa. The microhardness gradually reduces from the surface layer of the specimens to the internal matrix material. The surface microhardness value is up to 92.83HV
0.25, which is 15.32% higher than the matrix material microhardness.