石墨烯和聚四氟乙烯微粉共混物作为润滑油添加剂的摩擦...

PTFE

石墨烯和聚四氟乙烯微粉共混物作为润滑油添加剂的摩擦磨损行为研究   
Tribological Properties of Polytetrafluoroethylene Micro Powder and Graphene Composite Lubricating Oil Additives

作　　者：张晓宇 刘善邦 彭厚雄 蔡振兵
ZHANG Xiaoyu1, LIU Shanbang1 ,PENG Houxiong2, CAI Zhenbing1 （ 1. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China ; 2. Sichuan Gold Nuclear Irradiation Technology Co. ,Ltd. ,Pengshan Sichuan 620800, China）

机构地区：[1]西南交通大学机械工程学院摩擦学研究所,四川成都610031 [2]四川省金核辐照技术有限公司,四川彭山620800

出　　处：《润滑与密封》2018年第4期15-20,共6页
Lubrication Engineering

基　　金：国家自然科学基金项目（U1530136）; 四川省青年科技创新研究团队项目（2017TD0017）; 四川省重点研发项目（2017GZ0355）

摘　　要：采用CETR UMT-2摩擦磨损试验机考察不同质量配比的石墨烯和聚四氟乙烯（PTFE）微粉作为润滑油添加剂时65Mn弹簧钢的摩擦磨损性能,采用扫描电子显微镜、三维形貌仪、拉曼光谱等表征手段观察和分析磨痕形貌及化学成分,探究石墨烯和聚四氟乙烯润滑下的摩擦磨损机制。实验结果表明：相对单纯石墨烯添加剂,其与聚四氟乙烯微粉混合后具有更优异的减摩抗磨性能。当石墨烯与聚四氟乙烯微粉质量配比为6∶4时,平均摩擦因数相比于单纯石墨烯低了44.3%,磨损率降低了77.75%。在含石墨烯和聚四氟乙烯微粉的润滑油润滑下,65Mn弹簧钢磨损机制主要表现为磨粒磨损。
A systematic experimental investigation was conducted to study the effect of graphene and polytetrafluoroethylene（ PTFE） micro powder mixed additives with different weight ratios on the wear behavior of 65Mn spring steel by using CETR UMT-2 wear tester.SEM,3D-profiler and Raman spectra tester were used to observe the morphology of worn scar and analyze the chemical composition,in order to study the wear mechanism of 65Mn spring steel lubricated by PAO4 with the additives of different weigh ratios. The results show that the PAO4 additive mixed by graphene and PTFE micro powder provides a much better performance of friction reducing and anti-wear than pure graphene additive.When the weight ratio of graphene and PTFE micro powder is 6 ∶ 4,the averaged friction coefficient and wear rate are reduced by 44. 3%and 77. 75%,respectively,compared with that of pure graphene.The abrasive wear is the major mechanism of 65Mn spring steel when lubricated by PAO4 with the additives of PTFE and graphene.

关 键 词：石墨烯 聚四氟乙烯 添加剂 磨粒磨损

分 类 号：TH117.1[机械工程—机械设计及理论]