Fig. 1. Working principle of laser cladding. (a) High-speed laser cladding; (b) conventional laser cladding

Fig. 2. XRD and SEM images of the powder. (a) XRD; (b) SEM

Fig. 3. Amorphous and crystalline phase distribution of the coating cross section. (a) 2000 W; (b) 2200 W; (c) 2400 W; (d) 2600 W; (e) 2800 W

Fig. 4. Thermal effect of laser beam on substrate surface. (a) 2000 W; (b) 2400 W

Fig. 5. XRD pattern of coating at different laser power

Fig. 6. SEM and EDS analysis diagram of region A

Fig. 7. SEM images of the top and bottom of the coating under different laser powers

Fig. 8. Experimental results^[38]. (a) Relationship between temperature gradient G and solidification rate R with the depth of molten pool in CLC process; (b) effect of temperature gradient G and solidification rate R on crystallization tendency of melt

Fig. 9. Hardness distribution diagram and average hardness diagram from the top of the coating cross section to the substrate. (a) Hardness profile; (b) hardness test points in amorphous and crystalline areas; (c) average hardness chart

Fig. 10. Friction coefficient curves and wear rate diagram of the coating. (a) Friction coefficient curves; (b) wear rate

Fig. 11. SEM images of the surface wear morphology of the coating. (a) 2000 W; (b) 2200 W; (c) 2400 W; (d) 2600 W; (e) 2800 W

Fig. 12. Schematic diagram of friction and wear on the surface of the coating. (a) 2000 W; (b) 2200 W; (c) 2800 W