Abstract
COMSOL was used to simulate the temperature field of the preheating and non-preheating processes of the laser cladding multi-layer and multi-pass coating, and experimental verification was carried out. The results show that the temperature gradient value of the coating at the Z-axis is much larger than the value at the X and Y-axis, respectively. It indicates that the coating is sensitive to cracks at the Z-axis. After preheating, the quality of the coating is improved, and the results of the geometric morphology in experiments are basically consistent with the results of simulation. With increase in coating temperature, the cladding efficiency increased. The difference of temperature between the first and second layer was significantly reduced. The temperature gradient value at the Z-axis decreased. The coating grain structure presents as refined and well-distributed. The temperature gradient size in each layer decreased with the number of coatings increasing.
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Honggang Yin was born in Fushun, Liaoning, China, in 1995. He was a postgraduate student in the Department of Mechanical Engineering and Automation, Liaoning University of Technology. His main research interests are laser cladding, precision and special machining technology.
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Yin, H., Li, J., Zhao, L. et al. Simulation of in-situ preheating of ni-based multi-layer and multi-pass coatings on H13 steel. J Mech Sci Technol 36, 4671–4680 (2022). https://doi.org/10.1007/s12206-022-0828-9
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DOI: https://doi.org/10.1007/s12206-022-0828-9