A fully electrical–magnetic–thermal coupled model is proposed to investigate the heating mechanism of induction cladding. The simulation results reveal that the coating and the thin layer close to the substrate surface were heated layer by layer. Furthermore, the non-uniform electromagnetic field generated an uneven temperature distribution, which had a larger impact in the longitudinal direction than in the cross section. The maximum relative errors between the simulated and measured temperatures indiacate that the numerical calculation fit the experimental results well. The impact of the non-uniform temperature distribution on the coating properties was experimentally studied. The specimen in the middle position had a more complicated phase composition, lower porosity, and higher microhardness than those at the two ends.

提出了一种完全电-磁-热耦合模型来研究感应熔覆的加热机制。模拟结果表明，涂​​层和靠近基体表面的薄层被逐层加热。此外，不均匀的电磁场产生了不均匀的温度分布，对纵向的影响大于对横截面的影响。模拟温度与实测温度的最大相对误差表明数值计算与实验结果吻合较好。实验研究了非均匀温度分布对涂层性能的影响。与两端相比，中间位置的试样具有更复杂的相组成、更低的孔隙率和更高的显微硬度。