为细化涂层晶粒组织，提高熔覆涂层质量，采用旋转磁场辅助激光熔覆技术在Q235钢表面制备了Fe60复合涂层。借助扫面电子显微镜(SEM)、能谱仪(EDS)和X射线衍射(XRD)等表征手段对涂层进行了组织结构和物相分析，利用维氏硬度计测试了激光熔覆复合涂层截面显微硬度分布，通过摩擦磨损实验研究了涂层的磨损性能。结果表明，熔覆涂层主要由γ-(Ni,Fe)固溶体、Fe23(C,B)6和Cr5Si组成，Cr5Si3晶粒细化且分布均匀致密。旋转磁场辅助下，涂层平均显微硬度为685HV0.5，约为无磁场涂层的1.1倍；磨损失重仅为无磁场涂层的0.66倍，耐磨性能得到明显改善。

In order to grain refinement and improve the quality of laser cladding coating, the Fe60-base composite coatings are fabricated by rotating magnetic field auxiliary laser cladding on Q235 steel surface. The microstructures and phase composition of the coating are analyzed by means of scanning electron microscopy (SEM), X-Ray diffraction (XRD) and energy dispersive spectrometer (EDS). The cross-section micro-hardness of the cladding layer is measured by Vickers hardness tester, and the abrasion performance of the cladding is characterized through the friction and wear experiments. The results show that the phase of the laser cladding composite coatings is mainly composed of γ-(Ni,Fe) solid solution、silicides and borides. The Cr5Si3 grain is refined and uniform distributed. The average micro-hardness of the composite coating is 685HV0.5, which is 1.1 times of that of the coating without rotating magnetic field; the weight loss of laser cladding modified layer is only about 0.66 times of that of the coating without rotating magnetic field. The wear behaviors of the laser cladding composite coatings are improved significantly.