Fig. 1. Macroscopic surface morphology of sample after cladding

Fig. 2. Surface topographies under ultra depth of field microscope. (a) High-speed laser cladding surface; (b) laser remelting surface

Fig. 3. XRD analysis of high-speed laser cladding and remelting layer surfaces

Fig. 4. Microstructures of high-speed laser cladding and remelting layers. (a) Cross-section of cladding layer; (b) top area of cladding layer; (c) middle area of cladding layer; (d) bottom area of cladding layer; (e) cross-section of remelting layer; (f) top area of remelting layer; (g) middle area of remelting layer; (h) bottom area of remelting layer

Fig. 5. Element distribution of coating

Fig. 6. Hardness distribution of coating

Fig. 7. Wear performances of sample. (a) Wear weight loss; (b) friction coefficient

Fig. 8. Wear morphologies under ultra depth of field microscope. (a) Substrate; (b) cladding layer; (c) remelting layer

Table 1. Compositions of 27SiMn steel

Table 2. Main chemical compositions of Fe90 alloy powder

Table 3. Process parameters for test