目的 探究不同配比的B、Si元素对铁基非晶涂层非晶形成能力的影响，确定B、Si元素的最佳配比。方法 通过对B、Si元素配比进行优化，采用激光熔覆技术制备组织均匀、性能优良的铁基非晶涂层，利用X射线衍射仪、扫描电子显微镜、能谱分析仪、显微硬度计、纳米压痕仪与摩擦试验机对涂层的结构物相、微观形貌、力学性能及其摩擦学性能进行分析测试，研究B、Si元素对铁基非晶涂层组织结构与摩擦学性能的影响。结果 B、Si元素的原子数分数均达到10%时，涂层的非晶含量最高，由不含B、Si元素时的15%提升至47%，涂层由非晶相、铁基固溶体和铁铬钼的金属间化合物组成。涂层厚度在400 μm左右，显微维氏硬度达到1400HV0.2。在往复摩擦条件下，涂层的摩擦系数稳定在0.45，磨损率为2.28× 10–6 mm3/(N?m)，耐磨性能优良。结论 在激光熔覆FeCrMoBSi非晶涂层时，当B、Si元素的原子数分数均为10%时，B、Si小原子尺寸元素可以阻碍铁基非晶涂层中FeCrMo金属间化合物的形成，有效提高其非晶形成能力，进一步提高涂层的硬度和摩擦学性能。

The work aims to explore the influence of different ratios of B and Si elements on the amorphous formation ability of Fe-based amorphous coatings, and determine the optimum ratio of B and Si. By optimizing the ratio of B and Si elements, Fe-based amorphous coatings with uniform microstructure and excellent performance were prepared by laser cladding technology. The phase composition, microstructure, mechanical properties and tribological properties of the Fe-based amorphous coating were analyzed and tested by X-ray diffraction, scanning electron microscope, energy disperse spectroscope, Vickers indenter, nano-indentor and friction testing machine. The effects of B and Si elements on the microstructure and tribological properties of Fe-based amorphous coatings were investigated. The coating had the highest amorphous content of about 47% when the content of B and Si reached 10atm% and mainly included amorphous phase, homogeneous Fe-based solid solution and FeCrMo intermetallic compounds. The thickness of the coating was about 400 μm, and the micro-Vickers hardness was up to 1400HV0.2. Under the condition of reciprocating friction, the friction coefficient of the coating was stable at 0.45, and the wear rate was 2.28×10–6 mm3/N?m. The coating showed excellent wear resistance. The small size elements of B and Si with an atomic percentage of 10% can effectively improve the amorphous formation ability of Fe-based amorphous coating by laser cladding due to preventing the formation of FeCrMo intermetallic compounds, and further improve the hardness and tribological properties of the coating.