Fig. 1. SEM images of cladding powder. (a) Ni60; (b) WC; (c) CeO₂

Fig. 2. Schematics of laser cladding. (a) Schematic of experimental setup; (b) scan path; (c) laser processing equipment

Fig. 3. Macroscopic morphologies of cladding layers after flaw detection staining. (a) SampleT₂₅; (b) SampleT₂₀₀; (c) SampleT₃₅₀;

Fig. 4. SEM images of cladding layers. (a)‒(d) SampleT₂₅; (e)‒(h) SampleT₃₅₀; (i)‒(l) SampleT₂₅R; (m)‒(p) SampleT₃₅₀R

Fig. 5. SEM image and element surface distributions of cladding layer of SampleT₃₅₀R. (a) SEM image; (b)‒(f) element surface distributions

Fig. 6. Element surface distributions of cladding layer of SampleT₂₅. (a) Test location; (b) test result

Fig. 7. XRD patterns of cladding layers

Fig. 8. Microhardness distribution and average microhardness of cladding layers. (a) Microhardness distribution;

Fig. 9. Polarization curves of cladding layers

Fig. 10. Equivalent circuit diagram and Nyquist plot of cladding layers

Fig. 11. Surface morphologies of cladding layers soaked in NaCl solution (mass fraction of 3.5%) for 30 d. (a)(b) SampleP₂₅;

Fig. 12. Microscopic morphology and element distribution of region A in Fig.11

Fig. 13. Frictional coefficients of cladding layers

Fig. 14. Wear surface profiles of cladding layers. (a)SampleT₂₅; (b)SampleT₃₅₀; (c)SampleT₂₅R; (d)SampleT₃₅₀R

Fig. 15. Wear morphologies of cladding layers. (a) SampleT₂₅; (b) SampleT₃₅₀; (c) SampleT₂₅R; (d) SampleT₃₅₀R