Fig. 1. Schematic of sample cladding process, sampling and sample size

Fig. 2. Microstructures and energy spectra analysis results of laser cladding coating

Fig. 3. XRD spectra of laser cladding coating

Fig. 4. Hardness distribution of laser cladding coating cross section

Fig. 5. Tensile properties of laser cladding coating samples. (a) Stress-strain curve graph; (b) tensile strength and elongation

Fig. 6. Tensile fracture morphologies of samples. (a) Fe-based laser cladding coating sample; (b) Ni-based laser cladding coating sample; (c) Co-based laser cladding coating sample

Fig. 7. Impact toughness of samples

Fig. 8. Impact fracture morphologies of samples. (a) Fe-based laser cladding coating sample; (b) Ni-based laser cladding coating sample; (c) Co-based laser cladding coating sample

Fig. 9. Friction and wear experiments of substrate and laser cladding coatings. (a) Friction coefficient; (b) mass loss and wear rate

Fig. 10. Three-dimensional wear trajectory and maximum wear depth of samples. (a) Fe-based laser cladding coating; (b) Ni-based laser cladding coating; (c) Co-based laser cladding coating; (d) substrate

Fig. 11. Surface images of worn area of each sample. (a) Fe-based laser cladding coating; (b) Ni-based laser cladding coating; (c) Co-based laser cladding coating; (d) substrate

Fig. 12. EDS results of surface oxides. (a) Spot 1; (b) spot 2; (c) spot 3; (d) spot 4

Fig. 13. Electrochemical impedance spectra of samples in 3.5% NaCl solution. (a) Nyquist diagram; (b) Bode diagram

Fig. 14. Equivalent circuit. (a) Substrate; (b) laser cladding coatings

Fig. 15. Polarization curves of samples in 3.5%NaCl solution