Fig. 1. Photos of Fe-based alloy powders captured by scanning electron microscopy. (a) S1 powder; (b) S2 powder; (c) S3 powder;

Fig. 2. High power semiconductor laser cladding system

Fig. 3. Orthogonal test results. (a)-(i) Macroscopic morphologies of caldding layers prepared by technical parameters of No.1-9 in orthogonal test parameter table; (j) measurement results of cladding layer thickness, width of heat affected zone and dilution rate; (k) range analysis

Fig. 4. Macroscopic appearances and microstructures of cladding layers surface. (a) Macroscopic appearance; (b)-(e) microstructures of S1, S2, S3, S4 cladding layers

Fig. 5. Morphologies and EDS maps of cladding layers. (a)(e) S1 cladding layer; (b)(f) S2 cladding layer; (c)(g) S3 cladding layer;

Fig. 6. EBSD maps of cladding layers. (a) S1 cladding layer; (b) S2 cladding layer; (c) S4 cladding layer

Fig. 7. Vickers hardness and friction and wear properties of cladding layers and base material 42CrMo. (a) Vickers hardness; (b) friction and wear properties

Fig. 8. Surface condition of cladding layers and base material after salt spray corrosion test. (a) S1 cladding layer; (b) S2 cladding layer; (c) S3 cladding layer; (d) S4 cladding layer; (e) base material 42CrMo

Fig. 9. Corrosion mass loss of cladding layers and base material

Fig. 10. Potentiodynamic polarization curves of cladding layer and base material