MoSe_(2)/石墨烯-不锈钢自润滑材料的减摩机理  

Friction Reduction Mechanism of MoSe_(2)/Graphene-Stainless Steel Self-lubricating Materials

作　　者：燕松山[1] 肖正力 毛娅[1] 胡瑞[2] YAN Songshan;XIAO Zhengli;MAO Ya;HU Rui(School of Mechanical and Electrical Engineering,Wuhan University of Technology,Wuhan,430070;School of Mechanical Engineering,Nanchang College of Engineering,Nanchang,330099)

机构地区：[1]武汉理工大学机电工程学院,武汉430070 [2]南昌工程学院机械工程学院,南昌330099

出　　处：《中国机械工程》2024年第7期1151-1155,共5页China Mechanical Engineering

基　　金：国家自然科学基金(52365026)。

摘　　要：为克服不锈钢摩擦副零件摩擦因数大、易磨损的不足,利用粉末冶金不锈钢基体贯通孔隙特征和异质结纳米润滑剂超滑效应,采用真空浸渍和水热合成两步法工艺制备出了MoSe_(2)/石墨烯-不锈钢自润滑材料,并对其摩擦学特性与减摩机理进行了研究。研究发现:摩擦过程中,加入到基体孔隙的MoSe_(2)/石墨烯异质结润滑剂在摩擦表面形成了均匀润滑膜,显著减小了摩擦副的摩擦因数和磨损率。在常温、载荷40 N、转速100 r/min工况下,MoSe_(2)/石墨烯-不锈钢自润滑材料的摩擦因数低至0.106,磨损率降至6.45×10^(-5)mm^(3)/(N·m),与不锈钢基体相比,其摩擦因数和磨损率分别降低了86%和93%。In order to overcome the shortcomings of high friction coefficient and easy wear of stainless steel friction pair parts,based on the through-hole characteristics of powder metallurgy stainless steel porous matrix and the super sliding effect of heterojunction nano lubricants,a two-step preparation process of vacuum impregnation and hydrothermal synthesis were used to preduce MoSe_(2)/graphene-stainless steel self-lubricating materials.The tribological properties and friction reduction mechanism of the composites were studied.The results indicate that the MoSe_(2)/graphene lubricants in the matrix pores form a uniform lubricating film on the friction surfaces under the dragging effect during the friction processes,and significantly reduce the friction coefficient and wear rate of the friction pairs.At room temperature,load of 40 N,and speed of 100 r/min,the friction coefficient drops to 0.106,and the wear rate drops to 6.45×10^(-5) m^(3)/(N·m).Compared with the stainless steel matrix,the friction coefficient and wear rate are reduced by 86%and 93%respectively.

关 键 词：纳米复合材料 不锈钢 异质结 自润滑 石墨烯 

分 类 号：TH117.2[机械工程—机械设计及理论]