| Title | Effect of Mo Content on Microstructure and Fatigue Properties of Ni60 Coating Produced by Plasma Cladding |
|---|---|
| ID_Doc | 9911 |
| Authors | Wen, FJ; Long, Z; Xing, ZG; Wen, PC; Zhou, PS |
| Title | Effect of Mo Content on Microstructure and Fatigue Properties of Ni60 Coating Produced by Plasma Cladding |
| Year | 2023 |
| Published | Journal Of Thermal Spray Technology, 32.0, 5 |
| Abstract | Due to the long-term cold and heat cycle of gray cast iron parts, thermal fatigue phenomena, such as cracks, locally occur during the service process, resulting in the scrapping of the entire parts. If these defects are surface treated, it will help save energy, reduce emissions, and promote the development of the circular economy. In this study, the Ni60 + Mo coating was prepared on gray cast iron by plasma cladding. The microhardness, microstructure, constituents, thermal fatigue properties, and corrosion wear performance of the cladding layer were analyzed by the microhardness tester, scanning electron microscopy, x-ray diffraction, and thermal fatigue test. The results show that the Ni60 + Mo coating can effectively inhibit the crack propagation and improve the thermal fatigue performance of the cladding layer. Meanwhile, the addition of the Mo element can enhance the diffusion degree of alloying elements in the cladding layer, improve the microstructure uniform, reduce segregation, and promote the formation of equiaxed grain in the cladding layer. With the increase of the Mo element, the average hardness of the plasma cladding layer gradually increases, the fatigue cracks growth rate decreases, the matrix hardness decay value slowly decreases, and the simple wear and corrosion wear properties all decrease. The Ni60-4.5wt.% Mo coating has the best performance. |
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