静电冷却技术对钛合金摩擦磨损性能的影响

戚宝运, 何宁, 李亮, 卞荣, 杨雷

南京航空航天大学机电学院



摘要:

为了更好地将静电冷却技术应用到钛合金的车削中,在自行设计的高速摩擦磨损试验装置上,进行了YG8/Ti6Al4V摩擦副的摩擦磨损试验.结果表明:静电冷却技术可以有效地降低YG8/Ti6Al4V摩擦副间的摩擦系数,在抑制摩擦副磨损的同时还可以改善Ti6Al4V磨损表面质量.扫描电镜分析表明,硬质合金高速摩擦时的磨损机理以粘结剥落磨损为主,同时伴有微裂纹的产生.相对于干摩擦,静电冷却条件下的粘结磨损较小,减磨效果较好.静电冷却技术可以有效地抑制刀具磨损,提高刀具使用寿命.

关键词:  静电冷却  摩擦磨损  YG8  Ti6Al4V

DOI：10.11918/j.issn.0367-6234.2011.05.021

分类号:TG115.58

基金项目:国家自然科学基金资助项目(50975141)



Effect of static cooling technology on the friction and wear properties of titanium alloy

QI Bao-yun, HE Ning, LI Liang, BIAN Rong, YANG Lei

College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics, 210016 Nanjing,China

Abstract:

To investigate the tribology properties of titanium alloy in static cooling condition,the friction and wear experiments of YG8/Ti6Al4V were carried out on high speed friction and wear test auxiliary device designed by ourselves.The experimental results showed that static cooling technology could effectively decrease the friction coefficient of YG8/Ti6Al4V friction pair,restrain the wear of friction pair,and improve the worn surface quality of Ti6Al4V.SEM observation indicated that in high speed friction,the main wear mechanism was adhesion wear and shedding accompanied with microcracks.Compared with that in dry condition,adhesion wear was less under static cooling condition.The turning test results demonstrated that the anti-friction effect of static cooling technology could effectively restrain tool wear and improve tool life.

Key words:  static cooling  friction and wear  YG8  Ti6Al4V