不同温度对TC4-DT钛合金摩擦磨损性能的影响  

Effect of Different Temperatures on Tribological Properties of TC4-DT Alloy

作　　者：陆海峰[1] 缪强[1] 梁文萍[1] 任蓓蕾[1] 王昉[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院,南京211106

出　　处：《南京航空航天大学学报》2016年第1期29-34,共6页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(51174119)面上资助项目;南京航空航天大学博士学位论文创新与创优基金(BCXJ14-11)资助项目;江苏高校优势学科建设工程资助项目

摘　　要：以TC4-DT钛合金为研究对象,研究不同温度(20,300,500℃)对TC4-DT的摩擦磨损性能的影响。采用HT-500型摩擦磨损试验机对TC4-DT合金进行摩擦磨损实验,分析温度对摩擦因数及磨损率的影响;通过扫描电镜(Scanning electron microscope,SEM)和能谱(Energy dispersive spectrometer,EDS)等方法探究磨痕的形貌和成分变化及磨损机理。结果表明,随着温度的升高,磨损过程中TC4-DT合金表面不断生成氧化膜,摩擦因数从0.493下降到0.298,磨痕不断变窄变浅,磨损率大大降低;磨损机理在20℃时以粘着磨损、磨粒磨损为主,伴随着疲劳磨损;在300,500℃时以剥层磨损和氧化磨损为主,伴随少量的粘着磨损和磨粒磨损。The tribological properties of TC4-DT alloy at different temperatures（20,300,500 ℃）are studied.The friction and the wear experiments are performed on TC4-DT alloy by the friction and wear tester,and the effects of temperature on the friction coefficient and the wear ratio are analyzed.Moreover,the changes of morphology and chemical elements on wear scar and the wear mechanism of TC4-DT alloy are discussed by the means of scanning electron microscope（SEM）,energy dispersive spectrometer（EDS）and so on.The results show that：the oxide film appears on the surface of TC4-DT alloy,the friction coefficient of TC4-DT alloy decreases from 0.493 to 0.278 with the rise of temperature,the wear scar of TC4-DT alloy becomes narrower and shallower,and the wear ratio decreases a lot with the increase of temperature.The primary wear mechanism of TC4-DT alloy is abrasive wear and adhesive wear,along with fatigue wear at the temperature of 20 ℃,and that is delaminatiom wear and oxidation wear at the temperatures of 300,500 ℃,along with a little abrasive wear and adhesive wear.

关 键 词：TC4-DT钛合金 摩擦磨损 温度 摩擦因数 磨损机理 

分 类 号：V252.2[一般工业技术—材料科学与工程]