对激光熔注过程进行了多物理场仿真, 分析了电磁复合场参数对熔池内部流场、温度场和颗粒分布的影响规律, 并通过实验进行了验证。结果表明, 电磁复合场的施加可抑制熔池流速, 但对其温度场的分布无明显影响。当施加与重力同向的定向洛伦兹力时, 大部分增强颗粒集中在熔注层上层区域; 反之, 大部分增强颗粒集中在下层区域。

The multi-physics simulation of laser melt injection process is conducted and the effects of electromagnetic compound field parameters on the distributions of the flow field, temperature field and particles within the molten pools are investigated, which is also verified by the experiment. The results indicate that, the addition of the electromagnetic compound field can suppress the fluid speed, but does not obviously influence the temperature field distribution. When the directional Lorentz force and the gravity force are in the same direction, the majority of reinforcement particles is trapped in the upper region of the laser melt injection layer, conversely, the majority is in the bottom region.