温度对TC4钛合金磨损性能和摩擦系数的影响

耐磨性较差成为TC4合金用作高强耐腐蚀油管材料的技术瓶颈,采用SEM和EDS等手段对TC4合金在不同温度下的磨损性能进行研究,分析磨损率、摩擦系数和磨痕形貌随温度变化的规律,探讨磨损机理。结果显示:在室温到400℃的温度范围内,与对磨材料GCr15相磨损,TC4合金的磨损程度随温度的升高而减小,磨痕呈犁沟形貌,磨损经历了预磨损和稳定磨损两个阶段,磨损机理在较低温度时为剥层磨损、黏着磨损和疲劳磨损,在较高温度时为剥层磨损、黏着磨损和氧化磨损。

Effects of Temperature on Wear Properties and Friction Coefficient of TC4 Alloy

The wear resistance of titanium alloy is comparatively low, which becomes the technical bottleneck to use titanium alloy as high strength and corrosion resistance tubing materials in petroleum industrials. In this work, wear properties of TC4 alloy were studied. The relationship between temperature and weight loss rate of wear or wear coefficient or topography of wear mark, wear mechanism of TC4 alloy was discussed. The results show that the wear degree of TC4 alloy deceases with the rise of temperature, TC4 alloy wear has two stages that is wear stage and stable wear stage, The wear mark of TC4 alloy presents furrow morphology, the wear mechanism of TC4 alloy are delamination abrasion and adhesive abrasion and fatigue abrasion at lower temperature and are delamination abrasion and adhesive abrasion and oxidation abrasion at higher temperature