Fig. 1. Schematic of microhardness measurement path

Fig. 2. Upper surface macro-morphologies of laser cladded Co-based alloy under different defocus amounts. (a) D=110 mm; (b) D=130 mm; (c) D=150 mm

Fig. 3. Cross-sectional pattern of specimen. (a) D=130 mm; (b) D=150 mm

Fig. 4. Schematic of cladding direction

Fig. 5. Cross-sectional microstructure of surface cladding layer

Fig. 6. Cross-sectional microstructure of internal cladding layer

Fig. 7. Flow trace of molten pool of laser cladding layer

Fig. 8. Longitudinal hardness distribution of laser cladding layer

Fig. 9. Transverse hardness distributions at different depths of cladding layer