Abstract
Supersonic laser deposition (SLD) is a newly developed coating method which combines the supersonic powder stream produced by cold spray (CS) with synchronous laser heating of the deposition zone. This article presents a study of using the SLD technique to deposit Ni60–Ni composite coatings on 45# medium-carbon steel substrate (AISI 1045). The process was investigated to identify optimum parameters such as laser power. The microstructure of coating specimens and deposition characteristics was analyzed using scanning electron microscope (SEM) and energy dispersion spectrum (EDS), respectively. The results show that the SLD technique is able to achieve a dense crack-free coating with the optimal process parameter, because Ni particles are found to have deformed largely and be evenly distributed in the coatings, which benefit releasing residual stress developed in the composite coatings during the SLD process. The cross-section thickness of the Ni60–30 wt%Ni composite coatings increased with enhanced laser power. It is also found that a Ni-rich layer is generated at the interface between the coating and substrate. This softer Ni-rich layer serves as a transition layer to accommodate the adhesion between the coating and substrate.
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Acknowledgements
The authors would like to appreciate financial supports from the National Natural Science Foundation of China (51475429), the Youth Foundation Projects of Natural Science Foundation of Zhejiang Province (LQ13E050012), and the Commonweal Technology Research Industrial Project of Zhejiang Province (2013C31012).
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Yao, J., Yang, L., Li, B., Zhang, Q., Li, Z. (2022). Deposition Characteristics and Microstructure of Ni60–Ni Composite Coating Produced by Supersonic Laser Deposition. In: Hinduja, S., da Silva Bartolo, P.J., Li, L., Jywe, WY. (eds) Proceedings of the 38th International MATADOR Conference. MATADOR 2015. Springer, Cham. https://doi.org/10.1007/978-3-319-64943-6_12
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