油润滑下蛇纹石矿物改善钛合金摩擦学性能的研究  

Effect of Serpentine Mineral on Tribological Properties of Titanium Alloy under Oil Lubrication

作　　者：尹艳丽 王红美 于鹤龙 宋占永 周新远 吉小超 张伟 YIN Yanli;WANG Hongmei;YU Helong;SONG Zhanyong;ZHOU Xinyuan;JI Xiaochao;ZHANG Wei(National Key Laboratory for Remanufacturing,Army Academy of Armored Force,Beijing 100072,China;School of Mechatronic Engineering and Automation,Foshan University of Science and Technology,Guangdong Foshan 528231,China;Hebei Jingjinji Institute of Remanufacturing Industry&Technology,Hebei Hejian 062450,China)

机构地区：[1]陆军装甲兵学院装备再制造技术国防科技重点实验室,北京100072 [2]佛山科技学院机电工程与自动化学院,广东佛山528231 [3]京津冀再制造产业技术研究院,河北河间062450

出　　处：《摩擦学学报（中英文）》2024年第7期996-1007,共12页Tribology

基　　金：国家自然科学基金项目(52075544)资助。

摘　　要：采用SRV摩擦试验机研究了天然微纳米蛇纹石粉体作为CD 5W/40润滑油添加剂对Ti6Al4V合金摩擦学性能的影响,在不同添加量、载荷和频率条件下考察了和钢配副的钛合金的润滑自修复行为.利用扫描电子显微镜(SEM)、能谱仪(EDS)、X射线光电子能谱仪(XPS)和纳米压痕仪等分析了磨损表面的微观形貌、元素组成、元素含量和化学状态以及纳米力学性能等,揭示了蛇纹石矿物提高钛合金抗磨减摩性能的作用机理.结果表明:摩擦过程中添加到润滑油中的蛇纹石在钛合金磨损表面形成了1层由多种金属氧化物、硬质陶瓷颗粒和石墨等组成的自修复膜,该自修复膜具有优异的力学性能,有效隔离了摩擦副的直接接触,抑制黏着磨损,并有利于润滑油在摩擦表面的吸附和铺展,从而显著改善了油润滑条件下钛合金的摩擦学性能.在蛇纹石粉体质量分数为0.3%、载荷为10 N、频率为5 Hz时,钛合金的摩擦系数和磨损体积降至最小,与基础油润滑下相比分别降低55.91%和76.74%.Serpentine mineral powder has a unique metastable layered structure and excellent interfacial reaction activity on the friction surface.As a lubricating oil(grease)additive,the mineral can form a self-repairing layer with good friction-reducing and lubricating properties on the metal rubbing surface,realize the in-situ self-repair of micro damage on the worn surface,and at the same time strengthen the mechanical properties of the contact metal surface.It is considered a highly promising green and efficient lubricating material.In this paper,the surface modified natural serpentine mineral powder was introduced into the lubrication system for titanium alloy as a lubricating oil additive.Friction and wear behaviors of the surface modified serpentine mineral as a CD 5W/40 lubricating oil additive on Ti6Al4V alloy against steel was studied using the SRV4 reciprocating friction and wear tester.The effects of serpentine concentration in oil,applied load and reciprocating frequency on the tribological properties of titanium alloys under oil lubrication were systematically investigated.Scanning electron microscope(SEM),energy dispersive spectrometer(EDS),X-ray photoelectron spectroscopy(XPS)and nano indentation were used to analyze the micro morphology,element composition and chemical state,and nano mechanical properties of the worn surface under different lubrication conditions.The mechanism of serpentine mineral powder in reducing the friction and wear of titanium alloy was discussed.The results showed that the natural serpentine mineral as an additive could significantly reducing the friction,wear and frictional heat of titanium alloy when grinding with steel under oil lubrication.Compared with the pure CD 5W/40 oil,the friction coefficient at the titanium alloy/steel interface and wear volume of metal lubricated with oil containing serpentine was decreased by 11.1%~55.9%and 11.6%~76.7%,respectively,and the friction surface temperature decreased by 6~20℃.The efficiency of serpentine mineral in improving the tribologi

关 键 词：蛇纹石 TI6AL4V合金 油润滑 摩擦学性能 

分 类 号：TH117.2[机械工程—机械设计及理论]