蛇纹石/纳米铜复合添加剂改善铜合金减摩抗磨性能的研究  

Effect of Serpentine/Nano-Cu Composites as Lubricant Additive on Tribological Properties of Tin Bronze

作　　者：尹艳丽 于鹤龙 王红美 魏敏 史佩京 白志民[3] 张伟 YIN Yanli;YU Helong;WANG Hongmei;WEI Min;SHI Peijing;BAI Zhimin;ZHANG Wei(National Key Laboratory for Remanufacturing,Army Academy of Armored Force,Beijing 100072;Hebei Jingjinji Institute of Remanufacturing Industry&Technology,Hejian 062450;School of Materials Science and Technology,China University of Geosciences,Beijing 100083)

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]河北京津冀再制造产业技术研究院,河间062450 [3]中国地质大学材料科学与工程学院,北京100083

出　　处：《机械工程学报》2023年第18期54-68,共15页Journal of Mechanical Engineering

基　　金：国家自然科学基金面上资助项目(52075544)。

摘　　要：采用SRV滑动磨损试验机探究表面有机改性的蛇纹石/纳米铜复合作为减摩自修复添加剂对与钢配副的锡青铜抗磨减摩性能的影响。采用扫描电子显微镜、X射线能谱仪、X射线光电子能谱仪、纳米压痕仪等分析锡青铜磨损表面和截面微观形貌、元素种类与化学状态、纳米力学性能等,并探讨蛇纹石和纳米铜复合对锡青铜的减摩抗磨机理及二者的协同作用机制。结果表明:单组分蛇纹石、纳米铜添加剂均能改善锡青铜的摩擦学性能,而复合后改善效果显著增强,与基础油润滑下相比,锡青铜的摩擦因数减小26.3%~39.2%,磨损体积降低72.6%~88.9%。摩擦过程中,蛇纹石和纳米铜发挥摩擦学正协同作用,在锡青铜表面形成了由金属氧化物、硅的氧化物、硫化物、石墨、有机物、纳米铜颗粒等构成的复合自修复膜,该自修复膜具有多层结构且较为致密光滑,厚度达到3.73μm,其力学性能具有内部高、表面低的梯度变化,有利于提高锡青铜的摩擦学性能。The effect of surface organic modified serpentine and nano-Cu composites as lubricant additive on tribological properties of tin bronze matching with GCr15 steel is investigated by SRV oscillating sliding wear tester.Scanning electron microscope(SEM),X-ray energy dispersive spectroscopy(EDS),X-ray photoelectron spectroscopy(XPS),and nanoindenter are used to analyze the morphology of surface and section,elemental composition,chemical state,and nano mechanical properties of worn surfaces.The friction reducing and anti-wear mechanism of serpentine and nano-Cu composites on tin bronze and their synergistic action mechanism are discussed.Results show that single component serpentine and nano-Cu additives can improve tribological properties of tin bronze,and the improvement effect is significantly enhanced after serpentine and nano-Cu compounded,and the friction coefficient and wear volume of tin bronze are reduced by 26.3%~39.2%and 72.6%~88.9%respectively,compared with base oil lubrication.Serpentine and nano-Cu play a positive role in tribology,and a composite self-repairing film composed of metal oxide,silicon oxide,sulfide,graphite,organic matter and nano-Cu particles is formed on the tin bronze surface.The self-repairing film has a multilayer and it is dense and smooth,with the thickness of 3.73 mm,and its nanohardness,elastic modulus and nanohardness/modulus have the gradient variation that low in the surface and high in the subsurface,as contributed to the improvement of the tribological behaviors of tin bronze.

关 键 词：蛇纹石 纳米铜 复合添加剂 摩擦学性能 锡青铜 

分 类 号：TH117[机械工程—机械设计及理论]