论文部分内容阅读
钛合金的耐磨度较差,因其严重的粘着磨损倾向,不适合润滑滑动。通过织构化和表面涂层进行表面修饰,以提高钛合金基体的表面性能。硬质和耐磨涂层如Ti AlN和AlC rN被应用于钛合金表面,以铬作为中间层。为了进一步提高硬质涂层的耐摩擦磨损性能,使用固体润滑剂二硫化钼沉积在硬质涂层的的微坑。采用销-盘实验对涂覆基材进行单向滑动磨损测试,以评估其摩擦性能。在3个不同的载荷、时间40 min、2 m/s滑移速度下进行测试,分析研究多层涂层的摩擦行为,如涂层结构、摩擦因数和比磨损率。在滑移初期阶段,摩擦因数较低,约为0.1,这降低了材料转移,延长了耐磨寿命。除去部分二硫化钼涂层后,摩擦因数增大到较高值,硬质复合层仍然保护基体以免磨损。
Titanium alloy wear resistance is poor, because of its serious adhesive wear tendency, not suitable for sliding lubrication. Surface modification by texturing and surface coating to improve the surface properties of titanium alloy substrates. Hard and wear-resistant coatings such as TiAlN and AlCrN are applied to the titanium alloy surface with chromium as an intermediate layer. To further improve the wear resistance of hardcoats, a solid lubricant, molybdenum disulfide, was used to deposit micro pits in the hardcoats. One-way sliding wear testing of coated substrates was conducted using a pin-plate test to evaluate their tribological properties. The tests were carried out at 3 different loads, 40 min and 2 m / s slip speed. The friction behavior of the multi-layer coating was analyzed, such as coating structure, friction coefficient and specific wear rate. In the initial stage of slip, the friction factor is low, about 0.1, which reduces the material transfer and prolongs the wear life. After removing some of the MoS2 coatings, the friction factor increases to a higher value, and the hard composite layer still protects the substrate from wear.