Effect of laser scanning and milling speed on surface roughness of TC4 hybrid prepared

The effect of process parameters on the surface roughness of workpieces during the hybrid additive-subtractive manufacturing (HASM) has been studied. Firstly, TC4 cladding layers were prepared by laser under different scanning speeds. Then the cladding layers were milled to get the better surface. The microstructure, microhardness, and wear behavior of cladding layers were analyzed. The milling forces and the surface roughness were measured during and after the workpieces were milled with the different cutting speeds. Results show that with the laser scanning speed increase, the diffraction peaks of the α-Ti phase shift and gradually increase, the microstructure of cladding layer is refined gradually and the average microhardness of cladding layers also increases. However, the wear resistance of the cladding layers gradually decreases. Under the same scanning speed, high-speed milling is beneficial to obtain smaller milling force and surface roughness. Additionally, under the same vc, the minimum milling force and the surface roughness cladding layer are 6 mm/s and 10 mm/s respectively.