中文摘要：

为了研究硬质合金表面激光微织构工艺对膜-基结合性能的影响,利用光纤激光对硬质合金表面进行了微织构造型（不同微凹坑直径、深度及密度）,并选用PVD工艺利用超高真空多功能的磁控溅射系统对硬质合金织构后的表面进行TiAlN涂层的沉积;采用HXD-1000TMSC/LCD显微硬度计测定了涂层表面的显微硬度;应用X-350A X射线应力测定仪检测了基体织构后的表面残余应力以及涂层后试样截面的残余应力。研究结果表明：硬质合金基体激光微织构处理对涂层表面的显微硬度具有一定的影响,其中织构密度对显微硬度的影响较大;硬质合金表面激光微织构会在基体上引入残余拉应力,凹坑间距对残余应力影响很小,而织构密度对残余应力的影响较大。

英文摘要：

In the process of static magnetic field assisted laser machining, the flow field and thermal field of molten pool is difficult to be measured, therefore the numerical simulation method was used to calculate complete information of relevant parameters. A solid-liquid multiphase untied model was developed, including the solid-liquid phase transition, heat transfer, surface tension, thermal buoyancy and Lorentz force. The mechanism of laser melting which was regulated by static magnetic field was studied. The above mentioned physical processes coupled equations with boundary conditions were successfully solved by the finite element differential equation solver COMSOL Multiphysics. The distribution of the velocity field and temperature field were simulated with the magnetic field strength from 0.0 T to 0.6 T. The result showed that the velocity field was significantly inhibited by the magnetic field but it had a little effect on the temperature field. Finally, the simulation was confirmed by experiment with 316 stainless and results of sample surface temperature had a good agreement with experiment data. It indicated that the mathematical model had a certain precision and could provide guidance for the electromagnetic complex laser processing technology.