采用激光熔覆技术，在TA15钛合金表面制备了具有不同Nb4Si添加量的Ti-Fe合金涂层。采用X射线衍射仪(XRD)、扫描电镜(SEM)、显微硬度计、纳米压痕仪和摩擦磨损试验机，系统研究了Nb4Si含量对合金涂层组织和性能的影响规律。研究结果表明，不同Nb4Si含量的Ti-Fe合金涂层皆主要是由β-TiNb树枝初晶和β-TiNb+TiFe共晶组织所构成。但有所不同的是，随着Nb4Si添加量的增加，涂层中共晶组织的数量呈现出先增后减的变化趋势，即在Nb4Si添加量为2.0%(粒子数分数，下同)时，共晶组织的数量为最多，且在Nb4Si的添加量超过0.5%时，涂层中开始有少量的β-(TiNb)5Si3相形成。由于受共晶组织增强作用的影响，在Nb4Si添加量为2.0%时，合金涂层的硬度、减磨性和耐磨性能为最高，而弹性模量为最低。

Ti-Fe alloy coatings with different Nb4Si additions are prepared by laser cladding on TA15 alloy. The influence of Nb4Si content on microstructures and properties of the coatings are investigated by means of X-ray diffraction, scanning electron microscopy (SEM), microhardness tester, nano-indenter, and frication wear testing machine. The results show that the coatings with different Nb4Si additions mainly consist of β-TiNb dendrite and β-TiNb+TiFe eutectic. However, what has changed is that with the increase of the Nb4Si addition, the content of the eutectic presents the trend of first increasing then decreasing, namely, the highest value is obtained when the atomic fraction of Nb4Si particles is 2.0%. Another change in the microstructure is that a small amount of β-(TiNb)5Si3 phase is formed when the atomic fraction of Nb4Si addition is beyond 0.5%. When the atomic fraction of Nb4Si addition is 2.0%, the hardness, friction and wear properties of the coatings all reach the highest, while the elastic module is the lowest, as a result of high eutectic content.