Effects of Power Spinning on the Microstructure and Mechanical Properties of Fe-based Alloy Coating Fabricated by Laser Cladding

In this study, a laser-cladding-fabricated Fe-based alloy coating was processed using power spinning technology. The influences of power spinning treatment on the coating have been discussed. The results show that after the power spinning treatment, the surface roughness of the coating was reduced to Ra = 2.4 mu m, and the average grain size of the surface layer was refined from the original 46.32-35.25 nm. The surface structure of the cladding layer was crushed and elongated. The average hardness of the coating surface following power spinning treatment (544.5 HV) was much greater than the average hardness of the original coating surface (438.7 HV). After power spinning, the degree of work hardening of the sample increased and the strength increased, while the plasticity and elongation decreased. Meanwhile, brittle fractures in the upper part of the coating were more evident after the power spinning treatment.