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研究了离子渗氮处理工业纯钛TA2与硬质材料对磨的磨损性能。采用球盘摩擦磨损试验机评价摩擦学性能,选取了3种硬度的对磨副材料Si O2、Al2O3、Zr O2。利用光学显微镜、白光三维形貌仪、X射线衍射仪和显微硬度计分别对渗氮前后TA2的微观组织结构和硬度进行表征,并分析磨痕的表面形貌及元素组成。结果表明,渗氮后TA2表面生成了80μm厚的Ti N、Ti2N和α-Ti(N)硬质相渗氮层,表面硬度由140 HV提高至1260 HV,耐磨性能得到了提高。未处理样品的磨损机制主要是严重的黏着磨损、塑性形变和一定程度的磨粒磨损;渗氮样品的磨损机制主要为磨粒磨损,磨损率随对磨副材料硬度的升高而增大。
The wear performance of industrial pure titanium TA2 and hard materials on the wear of ion milling was studied. Tribological properties were evaluated using a ball-and-disk friction and wear tester. Three materials, Si O2, Al 2 O 3 and ZrO 2, were selected as the wear-resistant materials. The microstructure and hardness of TA2 before and after nitriding were characterized by optical microscope, white three-dimensional topography, X-ray diffraction and microhardness tester respectively. The surface morphology and elemental composition of the wear scar were analyzed. The results show that the nitrided TiN, Ti2N and α-Ti (N) hard nitriding layers are formed on the surface of TA2 after nitriding. The surface hardness increases from 140 HV to 1260 HV and the wear resistance improves. The wear mechanism of the untreated sample is mainly the adhesive wear, plastic deformation and a certain degree of abrasive wear. The wear mechanism of the nitriding sample is abrasive wear, the wear rate increases with the increase of the hardness of the vice material.