The mechanical properties of aluminum welds can be enhanced by the addition of SiC particles via laser melting injection (LMI). During LMI, in-situ reactions will happen in aluminum welds with SiC particles (SiC_p) and how to optimize it is challenging. In this paper, a novel process named wobbling laser melting injection (WLMI) is employed to successfully control in-situ reactions of Al/SiC, then improve hardness and wear performance of fusion zone (FZ) on the basis of LMI. Moreover, a multiphase flow model by bidirectionally coupling the computational fluid dynamics and discrete element method (CFD-DEM) is developed to reproduce this process. The temperature and velocity fields of both Al fluid and SiC_p during WLMI are characterized by numerical simulation. Firstly, the area greater than 1670 K can go through all parts of molten pool under WLMI compared with LMI that area just stays in the melt middle. Secondly, the temperature of particles prepared with WLMI can reach 1670 K and the duration above 940 K is longer. These special kinetic-thermodynamic behaviors during WLMI will cause in-situ products Al₄SiC₄ to be distributed evenly in Al substrate, and on SiC/Al interface. Finally, the evenly distributed strengthening phase in Al matrix and the strong bonding force of SiC/Al interface under WLMI result in better microhardness and wear performance of FZ respectively compared with LMI.

通过激光熔化注射 (LMI) 添加 SiC 颗粒可以增强铝焊缝的机械性能。_{在 LMI 期间，带有 SiC 颗粒 (SiC p} )的铝焊缝中会发生原位反应，如何对其进行优化具有挑战性。本文采用摆动激光熔化注射（WLMI）新工艺成功控制了Al/SiC的原位反应，在LMI的基础上提高了熔合区（FZ）的硬度和磨损性能。此外，通过双向耦合计算流体动力学和离散元方法（CFD-DEM）开发了多相流模型来重现该过程。_{Al 流体和 SiC p}的温度和速度场WLMI 期间的特点是数值模拟。首先，大于 1670 K 的区域在 WLMI 下可以通过熔池的所有部分，而 LMI 区域仅停留在熔体中间。其次，WLMI制备的颗粒温度可达1670 K，940 K以上的持续时间更长。WLMI过程中这些特殊的动力学-热力学行为将导致原位产物Al ₄ SiC ₄均匀分布在Al衬底中，以及SiC/Al界面上。最后，与LMI相比，WLMI下Al基体中均匀分布的强化相和SiC/Al界面的强结合力分别导致FZ的显微硬度和磨损性能优于LMI。