【摘要】 采用等离子熔覆技术，通过Ti、W和C的原位反应，制备了不同Ti、W配比的（Ti, W）C/Ni涂层，对涂层的物相组成、微观组织、显微硬度和摩擦磨损性能进行了检测与分析。结果表明，在等离子高温熔池中，Ti、C会优先反应生成TiC,随着W扩散进入TiC而形成（Ti, W）C。在镍基黏结相的质量分数一定（60%）的情况下，当原料中Ti、W原子配比由Ti_0.5-W_0.5增至Ti_0.9-W_0.1时，（Ti, W）C的生成量增多，颗粒形貌由规则多边形转变为近圆形，其对应涂层(Ti_0.9,W_0.1)C-Ni具有最佳的显微硬度和摩擦磨损性能，磨损体积仅为Ni基合金涂层的18%。原位自生（Ti, W）C的高硬度、圆润颗粒形貌，以及γ-（Fe, Ni）枝晶细化，有效提升了涂层抵抗黏着磨损和磨粒磨损的能力。更多还原

【Abstract】 The（Ti, W）C/Ni coatings with different Ti and W ratios were prepared through the in-situ reaction of Ti, W and C using plasma cladding technology. The phase composition, microstructure, microhardness, and friction and wear properties of the coatings were studied. The results show that the reaction between Ti and C in the high-temperature molten pool generates TiC preferentially. With the diffusion of W, TiC transforms into（Ti, W）C. When the content of nickel based binder phase is constant（60%）, the generation of（Ti, W）C increases and the morphology of（Ti, W）C particles changes from regular polygons to nearly circular shapes as the atomic ratio of Ti and W increases from Ti_0.5-W_0.5 to Ti_0.9-W_0.1 in the raw material. The microhardness and wear resistance of(Ti_0.9,W_0.1)C-Ni coating are the best, with a wear volume only 18% of that of Ni-based alloy coatings. The high hardness and rounded morphology of in-situ（Ti, W）C and the refinement of γ-（Fe, Ni） dendrites has improved the resistance to adhesive and abrasive wear of the coatings.更多还原