超低温滚动轴承材料摩擦特性试验研究  

Experimental study on friction characteristics of cryogenic rolling bearing materials

作　　者：任炯历 苏冰[1] 刘丰波 张广涛 刘鹏 张文虎 REN Jiongli;SU Bing;LIU Fengbo;ZHANG Guangtao;LIU Peng;ZHANG Wenhu(School of Mechanical Engineering,Henan University of Science and Technology,Luoyang 471003,China;Luoyang Bearing Research Institute Co.,Ltd.,Luoyang 471003,China)

机构地区：[1]河南科技大学机电工程学院,洛阳471003 [2]洛阳轴承研究所有限公司,洛阳471003

出　　处：《现代制造工程》2024年第3期156-160,94,共6页Modern Manufacturing Engineering

摘　　要：利用高速旋转式摩擦磨损试验机,在超低温液氮环境下测试了Ag、聚四氟乙烯(PTFE)和MoS_(2)涂层在不同接触应力和不同滑动速度下的摩擦特性。使用XM-200型表面形貌仪、JSM-7800F型扫描电子显微镜(SEM)和能谱仪(EDS)分析了钢盘的磨痕形状及主要成分,探究了超低温环境下3种涂层的摩擦系数及磨损机理。结果表明,在2种滑动速度(高滑动速度2 m/s和低滑动速度0.4 m/s)条件下,有涂层时的摩擦系数变化范围不大,无涂层润滑时的摩擦系数则受滑动速度影响较大,其中MoS_(2)和PTFE涂层的减摩效果最好;同种工况下3种涂层的磨损量随着载荷的增大而增大,PTFE在超低温环境下耐磨性较差,磨损量较大,钢对MoS_(2)涂层的磨损量最小,钢对Ag涂层次之,说明Ag和MoS_(2)在超低温环境下均表现出良好的耐磨性,磨损量较小。The friction characteristics of silver(Ag),polytetrafluoroethylene(PTFE)and molybdenum disulphide(MoS_(2))coat-ings were tested under different contact stresses and different sliding speeds using a high-speed rotary friction and wear tester in an ultra-low temperature liquid nitrogen(LN_(2))environment.The shape of the wear marks and the main components of the steel discs were analysed using an XM-200 surface morphometer,a JSM-7800F scanning electron microscope(SEM)and an energy spectrometer(EDS),and the friction factors and wear mechanisms of the three coatings were investigated under ultra-low temper-ature environment.The results show that the friction factor of the coated steel discs does not vary much under two speeds(high sliding speed of 2 m/s and low sliding speed of 0.4 m/s),while the friction factor of the uncoated steel discs is influenced by the sliding speed,with MoS_(2) and PTFE having the best friction reduction effect.The wear of the three coatings increases with increas-ing load for the same operating conditions.The wear resistance of PTFE in the ultra-low temperature environment is poor and the wear amount is higher,while the wear amount of steel/MoS_(2) coating is the smallest and steel/Ag coating is the second,indicating that both Ag and MoS_(2) show good wear resistance in the ultra-low temperature environment and the wear amount is smaller.

关 键 词：超低温环境 固体润滑 涂层材料 摩擦磨损 

分 类 号：TH133.33[机械工程—机械制造及自动化]