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利用双层辉光等离子冶金技术在Ti2Al Nb合金表面制备渗铝层,分析了渗铝层的成分、显微组织及相结构,测定了渗层的硬度分布,评价了室温干滑动磨损条件下的摩擦磨损性能。结果表明:在Ti2Al Nb合金表面形成约4μm的沉积层和6μm合金扩散层。扩散层中的硬度随渗层厚度呈梯度递减。渗铝层的磨损率为0.18×103mg/N·m,仅是基体的0.67倍,磨损机理属于轻微磨损,可见,双辉等离子渗铝在一定程度上提高基体材料的耐磨性。
The aluminized layer was prepared on the surface of Ti2Al Nb alloy by double glow plasma metallurgy technique. The composition, microstructure and phase structure of the aluminized layer were analyzed. The hardness distribution of the aluminized layer was determined. The effects of dry sliding wear at room temperature Friction and wear properties. The results show that about 4μm deposit and 6μm alloy diffusion layer are formed on the surface of Ti2Al Nb alloy. The hardness of the diffusion layer decreases gradually with the thickness of the diffusion layer. The wear rate of aluminized layer is 0.18 × 103mg / N · m, only 0.67 times that of the matrix, and the wear mechanism is minor wear. It can be seen that double-glow plasma aluminizing improves the wear resistance of the matrix material to a certain extent.