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利用双层辉光等离子表面冶金技术,以石墨为源极,Ti6Al4V为阴极,一定比例的氮气和氩气为载气,在其表面形成Ti(C,N)改性层。观察分析了改性层的成分、显微组织及相结构,评价了其纳米硬度和室温干滑动磨损条件下的摩擦磨损性能。结果表明:改性层主要组成相为Ti(C0.3N0.7);碳、氮元素分布由表及里呈梯度分布;改性层纳米硬度高达41 GPa,较基体明显提高;在室温干摩擦磨损条件下,改性层与基体相比,摩擦因数由0.45降低到0.28,比磨损率也大大下降,表现出优异的耐磨减摩性能。
Using double glow plasma surface metallurgy, graphite (Ti6Al4V) as cathode and a certain proportion of nitrogen and argon as carrier gas formed Ti (C, N) modified layer on the surface. The composition, microstructure and phase structure of the modified layer were observed and analyzed. The tribological properties of the modified layer were evaluated under the conditions of its nano-hardness and dry sliding wear at room temperature. The results show that the main phase composition of the modified layer is Ti (C0.3N0.7); the distribution of carbon and nitrogen is gradient distribution from the surface to the surface; the nano-hardness of the modified layer reaches 41 GPa, which is obviously higher than that of the matrix; Under the condition of wear, the friction coefficient of the modified layer is reduced from 0.45 to 0.28 compared with the matrix, the specific wear rate is greatly decreased, showing excellent wear-resistant and friction-reducing properties.