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利用自行研制的电磁搅拌装置辅助钛合金激光沉积修复,通过有限元软件ANSYS进行数值模拟,并与试验相结合,研究了钛合金激光熔池内“磁-电-力”的相互作用关系。结果表明,在旋转磁场的作用下,激光熔池内的液体表面磁感应强度与激励电流成正比,与频率成反比;激光熔池受到径向力和切向力的作用,但是前者较小,可以忽略不计,液体横截面上电磁力密度最大值与激励电流成正比。在旋转磁场的作用下激光沉积修复件表面两侧凸起且修复层内部组织α/β片层长径比减小。
The self-developed electromagnetic stirring device was used to assist the laser deposition and repairing of titanium alloy. The numerical simulation was carried out by the finite element software ANSYS. Combined with the experiment, the interaction of the “magnet-electric-force” in the titanium alloy laser pool was studied. The results show that under the action of rotating magnetic field, the magnetic induction intensity of the liquid surface in the laser pool is proportional to the excitation current and inversely proportional to the frequency. The laser pool is subject to radial force and tangential force, but the former is small and can be neglected Excluding, the maximum cross-section of the electromagnetic force density and excitation current is proportional to. Under the action of the rotating magnetic field, the surface of the laser deposition repair member is convex on both sides and the aspect ratio of the α / β sheet in the repair layer is reduced.