目的 利用电磁复合场（EMCF）辅助激光熔覆制备TiBw/Ti网状结构复合涂层，探索电磁场对涂层组织结构的影响。方法 以TiB2∶Ti=1∶1（摩尔比）的混合粉末为熔覆材料，TC4作为基板材料，通过外加电磁复合场进行激光熔覆试验。通过扫描电子显微镜（SEM）观察洛伦兹力方向对熔覆层组织结构的影响，利用X射线衍射仪（XRD）和维氏显微硬度计分析施加电磁复合场前后熔覆层的相组成和硬度分布。结果 未施加电磁复合场的熔覆层组织主要为细针状、粗棒状和颗粒状组织。而施加电磁复合场后，熔覆层出现了网状结构，而且方向向下的洛伦兹力可使涂层内部形成空间间距更大的网状结构。此外，单独施加稳态磁场后，熔覆层只出现细针状和粗棒状组织。电磁复合场施加前后熔覆层硬度与基体相比，均有很大的提高。但未施加电磁复合场的熔覆层硬度变化幅度较大；施加电磁复合场后，随着距熔覆层表面距离的增加，硬度的变化幅度比较平缓。结论 在洛伦兹力作用下，可得到TiBw/Ti网状结构的复合涂层，电磁复合场使TiBw/Ti网状结构强化相均匀分布，同时提高涂层的显微硬度。

The work aims to prepare TiBw/Ti coating by electric-magnetic compound field (EMCF) with laser cladding and study the influence of electric-magnetic field on the microstructure of coating. The mixed powders (Mole ratio TiB2∶Ti=1∶1) were used as the cladding materials, and TC4 was used as the substrate material. The laser cladding experiment was carried out under external electromagnetic field. The effect of Lorentz force on the microstructure of the cladding layer was observed by scanning electron microscopy (SEM) and the phases and hardness of the coatings without and with EMCF were tested by the X-ray diffraction (XRD) and Vickers hardness tester, respectively. The microstructure of coatings without EMCF appeared as thick needles, thick rods and particles form, while the coating with EMCF showed the network characteristics. Moreover, when the Lorentz force was downward direction, the network microstructures had a larger spatial spacing. The microstructure of the laser cladded coating with magnetic compound field (MCF) appeared as thick needles and thick rods. The hardness of the coatings without and with EMCF was greatly improved compared with that of the matrix, but the hardness of the coatings without EMCF varied greatly. With the increase of the distance from the cladding layer surface, the variation of hardness was relatively gentle after the electro-magnetic composite field was applied. The composite coating with TiBw/Ti reticular structure can be obtained under Lorentz force, the electromagnetic composite field makes the reinforcement phases of TiBw/Ti reticulate structure uniformly distributed, and improves the microhardness of the coating at the same time.