Fig. 1. Schematic diagram of laser cladding system

Fig. 2. Morphology of cladding powder. (a) Optical microscope picture; (b) scanning electron microscope picture

Fig. 3. Macroscopic morphology and penetrant test results of cladding layer at different laser powers

Fig. 4. Influence of laser power on parameters of cladding layer. (a) Height; (b) width; (c) depth; (d) dilution rate; (e) content of unmelted TiC; (f) porosity

Fig. 5. SEM images of the microstructure of the top, center, and bottom areas of the cladding layer at different laser powers

Fig. 6. Effect of laser power on the content of precipitated TiC in the cladding layer

Fig. 7. Effect of laser power on the secondary dendrite arm spacing of the cladding layer microstructure. (a) Precipitated TiC; (b) matrix

Fig. 8. Effect of laser power on the microstructure characteristics of the cladding layer. (a) Radar chart of the grey relational coefficient of each microstructure characteristics; (b) variation of the grey relational grade

Fig. 9. Effect of laser power on the hardness of the cladding layer. (a) Average hardness; (b) gradient for hardness

Fig. 10. Schematic diagram of the two dissolution mechanisms of TiC particles. (a) From the outside to the inside; (b) integral decompostion