Fig. 1. Laser cladding experiment. (a) Laser cladding with preplaced powder; (b) 6 kW laser processing system; (c) macro-morphology of coating

Fig. 2. Diagram of wear test equipment

Fig. 3. XRD pattern of alloy coating

Fig. 4. Metallographic images. (a) Transition area; (b) coating

Fig. 5. EBSD results of coating structure. (a) EBSD morphology of coating cross section; (b) coating grain size distribution

Fig. 6. Distributions of EDS element in coating cross section

Fig. 7. Element distributions in coating and transition zone. (a) Element distribution curves of coating and transition zone; (b) elemental composition of transition zone

Fig. 8. Hardness analysis of coating-substrate. (a) Section hardness change of coating-substrate; (b) EBSD morphology of transition cross section; (c) phase distribution of transition cross section

Fig. 9. Wearing surface morphologies changes of the pins before and after wear test. (a) 304 stainless steel pin surface before wear; (b) 304 stainless steel pin surface after wear; (c) coating pin surface before wear; (d) coating pin surface after wear

Fig. 10. Morphologies and EDS element analysis of stainless steel pin wearing disk. (a) Oxidative wear area; (b) adhesive wear area

Fig. 11. Morphologies and EDS element analysis of alloy coating wearing disk

Fig. 12. Comparison of average friction coefficients between coating and 304 stainless steel