TC11钛合金表面保护性摩擦氧化层的形成及作用  

Formation and function of protective tribo-oxide layers on TC11 titanium alloy surface

作　　者：李新星[1,2,3] 王红侠 施剑峰[3] 韩伯群 LI Xin-xing;WANG Hong-xia;SHI Jian-feng;HAN Bo-qun(Department of Materials Science and Engineering,Suqian College,Suqian 223800,Jiangsu,China;Institute of Industrial Technology Research,Suqian College,Suqian 223800,Jiangsu,China;Jiangsu Fengdong Thermal Technology Limited Company,Yancheng 224100,Jiangsu,China)

机构地区：[1]宿迁学院材料科学与工程系,江苏宿迁223800 [2]宿迁学院产业技术研究院,江苏宿迁223800 [3]江苏丰东热技术有限公司,江苏盐城224100

出　　处：《材料工程》2020年第10期141-147,共7页Journal of Materials Engineering

基　　金：江苏省第五期“333工程”培养资金资助项目(BRA2019225);江苏省高等学校自然科学研究项目(17KJB430030,19KJB430036);江苏省高校“青蓝工程”资助项目(DTR202004)。

摘　　要：采用MPX-2000型销盘式磨损试验机,在2.68 m/s和4 m/s滑动速率下对TC11钛合金进行干滑动磨损实验以及特殊设计的双滑动磨损实验。通过X射线衍射仪、扫描电镜和能谱仪对磨损表面及摩擦层的物相、成分和形貌进行详细分析。采用数字显微硬度仪测试摩擦层至钛合金基体的显微硬度分布。结果表明:不同滑动速率下TC11钛合金磨损表面均能形成一层摩擦层。摩擦层的物相、状态和性能随滑动条件改变而发生变化。摩擦层可以分为无氧化物摩擦层和摩擦氧化层。通过4 m/s和2.68 m/s双滑动磨损实验直接验证了TC11钛合金干滑动磨损过程中形成的摩擦氧化层具有良好的减磨效果。TC11钛合金在2.68 m/s速率下的磨损机理为剥层磨损;在4 m/s以及4 m/s和2.68 m/s双滑动时的磨损机理均为氧化磨损。Dry sliding wear tests and specially designed double sliding wear tests of TC11 titanium alloys were carried out at sliding velocities of 2.68 m/s and 4 m/s by using a MPX-2000 type pin-on-disc wear tester.The phase,composition and morphology of worn surfaces and tribo-layers were analyzed in detail by X-ray diffractometer,scanning electron microscope and energy dispersive spectrometer.The microhardness distribution from tribo-layers to the matrix was measured by using a digital microhardness tester.The results show that tribo-layers are always found to be formed on the worn surface of TC11 titanium alloy at different sliding rates.The phase,state and property of the tribo-layer vary with the sliding conditions.Tribo-layers can be divided into tribo-oxide layer and no-oxide tribo-layer.Through 4 m/s&2.68 m/s double sliding wear test,the tribo-oxide layer formed in the dry sliding wear process of TC11 titanium alloy is proved to possess good wear-reducing effect.The wear mechanism of TC11 titanium alloy is delamination wear at 2.68 m/s,and oxidative wear at 4 m/s and 4 m/s&2.68 m/s.

关 键 词：钛合金 干滑动 摩擦层 双滑动 磨损机理 

分 类 号：TG115.58[金属学及工艺—物理冶金]