为了提升TC4表面摩擦学性能,利用通快4002同轴送粉光纤激光器,在TC4表面制备了TC4+Ni60+Ni-MoS2多元复合自润滑耐磨涂层,并分析研究了涂层组织和摩擦学性能。结果表明,熔覆层中无裂纹产生,但存在少量气孔缺陷,涂层生成相主要包括TiC、Ti2Ni、Ti2SC以及α-Ti;各生成相在涂层中的分布均匀致密,其中Ti2SC与Ti2Ni形成了Ti2SC-Ti2Ni镶嵌结构复合相, (001 )Ti2Ni晶面与 (01 1ˉ0 )Ti2SC晶面间的错配度为3.18%,两相形成了共格界面关系;涂层的显微硬度较基材得到显著提高,Ti2SC-Ti2Ni镶嵌结构复合相有效改善了涂层的减摩、耐磨性能,涂层磨损机制为磨粒磨损。

To improve the tribological properties of TC4 surfaces, a TC4+Ni60+Ni-MoS₂ multi-component composite self-lubricating wear-resistant coating was prepared on the TC4 surface by the TruDisk4002 coaxial powder feeding fiber laser. The microstructure and the tribological performance of this coating were also analyzed. The results show that there are no cracks but a few pores within the coating. The main precipitation phases of the coating are TiC, Ti₂Ni, Ti₂SC, and α-Ti, and they are uniformly and compactly distributed within the coating. Ti₂SC and Ti₂Ni form the Ti₂SC-Ti₂Ni mosaic structure composite phase, and the misfit between (01 1ˉ0 )Ti2SC and (001 )Ti2Ni is 3.18%. Ti₂SC and Ti₂Ni form the coherent interface relationship. The coating micro-hardness is obviously higher than that of the substrate. The Ti₂SC-Ti₂Ni mosaic composite phase can effectively improve the anti-friction and wear resistance of coatings, and the wear mechanism of coatings is abrasive wear.