Fig. 1. Diagram of pin-disk friction wear test

Fig. 2. Surface morphologies of cladding layer. (a) Macro-photograph of cladding layer; (b) OM image of cladding layer；(c) SEM image of cladding layer

Fig. 3. SEM image of cladding layer and EDS element map-scanning results corresponding to SEM image.(a) SEM image of cladding layer; (b) Co element area distribution; (c) Cr element area distribution; (d) C element area distribution

Fig. 4. XRD pattern of cladding layer

Fig. 5. EBSD phase diagram of cladding layer

Fig. 6. Diameter map and distribution of cladding layer grains. (a) Grain diameter map; (b) grain diameter distribution

Fig. 7. Surface morphologies of substrate and interface. (a) OM image of substrate; (b) macro-photograph of cladding layer cross-section; (c) OM image of interface; (d) SEM image of interface

Fig. 8. Element distributions at the interface by EDS line-scanning test

Fig. 9. Hardness distribution of cladding layer

Fig. 10. Wear resistance comparison

Fig. 11. Wear surface micrographs and cross-sectional profiles of wear tracks of substrate and cladding layer. (a)(b) Wear surface micrographs of substrate; (d)(e) wear surface micrographs of cladding layer; (c) cross-sectional profile curve of substrate wear tracks; (f) cross-sectional profile curve of cladding layer wear tracks