To investigate the effect of spherical NbC particles on the wear resistance of nickel-based coatings, five groups of samples were tested. The microstructure of nickel-based coatings reinforced by spherical NbC particles was examined through X-ray diffraction, scanning electron microscopy, and energy dispersive spectrometry. The wear behavior of samples was analyzed by microhardness, coefficient of friction, 2D profile across the wear track and summary of tribological properties, respectively. The results shows that in the microstructure of nickel-based coatings reinforced by spherical NbC particles, γ-Ni solid solution and Cr₂₃C₆ dominated the coating, and complex carbides (NbC, Cr₇C₃ and a small amount of Cr₃C₂) and borides (Cr₂B) were also detected. The hardness of the nickel-based coating was 400HV_0.2. With the increase of the NbC content in the coating, the hardness gradually increased, reaching the maximum when the content was 40% NbC, which was 610HV_0.2. The average friction coefficient of AISI 4145H steel was 0.473, and the average friction coefficient of nickel-based coating was 0.573. With the increase of NbC content in the coating, the friction coefficient of the coating gradually decreased, reaching the lowest at a NbC content of 40%, which was 0.470. Although the friction coefficient of the coating changed slightly with the addition of NbC, in the friction and wear of the nickel-based coating, the coating was adhesively worn, and there were many abrasive dust, scratches and grooves on the surface of the coating. By the way, there were only a few scratches on the surface after friction and wear of the nickel-based coating containing 40% NbC. The wear rate of the coating with 40% NbC content was about 1.6% of AISI 4145H steel or one-tenth of the nickel-based coating.

为了研究球形NbC颗粒对镍基涂层耐磨性的影响，测试了五组样品。通过X射线衍射，扫描电子显微镜和能量色散光谱研究了球形NbC颗粒增强的镍基涂层的微观结构。分别通过显微硬度，摩擦系数，整个磨损轨迹的2D轮廓和摩擦学特性分析来分析样品的磨损行为。结果表明，在球形NbC颗粒增强的镍基涂层的微观结构中，γ-Ni固溶体和Cr ₂₃ C ₆占主导地位，复合碳化物（NbC，Cr ₇ C ₃和少量Cr ₃C ₂）和硼化物（Cr ₂ B）也被检测到。镍基涂层的硬度为400HV _0.2。随着涂层中NbC含量的增加，硬度逐渐增加，当含量为40％NbC时达到最大值，即610HV _0.2。AISI 4145H钢的平均摩擦系数为0.473，镍基涂层的平均摩擦系数为0.573。随着涂层中NbC含量的增加，涂层的摩擦系数逐渐降低，当NbC含量为40％时，摩擦系数最低，为0.470。尽管随着NbC的添加，涂层的摩擦系数略有变化，但是在镍基涂层的摩擦和磨损中，涂层发生了粘着磨损，并且在涂层表面上有许多研磨性粉尘，划痕和凹槽。顺便说一下，在含有40％NbC的镍基涂层发生摩擦和磨损之后，表面上只有很少的划痕。NbC含量为40％的涂层的磨损率约为AISI 4145H钢的1.6％，是镍基涂层的十分之一。