TD法VC涂层与陶瓷和钢对摩时摩擦磨损性能对比研究

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采用TD法在Crl2MoV冷作模具钢表面制备VC涂层，在摩擦磨损试验机上考察VC涂层与钢球、钢柱和陶瓷球配副时的摩擦磨损性能，利用扫描电镜、粗糙度测量仪和x射线衍射仪（XRD）分析涂层磨损前后表面及界面的形貌、表面粗糙度和物相组成。结果表明，与不同摩擦副配副时，VC涂层摩擦因数随着磨损时间增加先增大后趋于平稳，磨损率随着磨损时间增加而减小，其中与钢柱配副时摩擦因数最小，磨损率最低。与不同摩擦副配副时，VC涂层磨损机制与失效形式不同，与钢球配副时VC涂层磨损机制为磨粒磨损，失效形式为划痕和剥落坑；与钢柱配副时VC涂层磨损机制为黏着磨损和疲劳磨损，失效形式为犁沟和片层状剥落；与陶瓷球配副时VC涂层磨损机制为氧化磨损，失效形式为脆性断裂。 VC coating was prepared with TD process on the Cr12MoV cold die surface, and the friction and wear properties of VC coating with steel ball, steel nail and ceramic ball were investigated with friction and wear test. The morphologiesof surface and interface, the surface roughness and phases of VC coating before and after wear were analyzed with SEM （ Scanning Electron Microscopy）, surface roughness tester and XRD （X-ray Diffraction）, respectively. The results show that the friction coefficient of VC coating increases with the wear time first, and then becomes stable when matched with different friction pairs,while the wear rate decreases with the wear time. The friction coefficient and the wear rate of VC coating are both the least when matched with steel nail. The wear and failure forms are different when matched with different friction pairs. The wear mechanism is an abrasive wear, and the failure form is a scratching and peeled pit when matched with steel ball. And the wear mechanism is an adhesion wear and fatigue wear, the failure form is the furrows and slice exfoliation when matched with steel nail. While matched with the ceramic ball, the wear mechanism is an oxidative wear, the failure form is a brittle fracture.