Friction Reduction Mechanism of MoSe2/Graphene-Stainless Steel Self-lubricating Materials

doi:10.3969/j.issn.1004-132X.2024.07.002

Abstract

Abstract: 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 MoSe2/graphene-stainless steel self-lubricating materials. The tribological properties and friction reduction mechanism of the composites were studied. The results indicate that the MoSe2/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 m3/(N·m). Compared with the stainless steel matrix, the friction coefficient and wear rate are reduced by 86% and 93% respectively.

Key words: nano-composite, stainless steel, heterojunction, self-lubrication, graphene

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MoSe2/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MoSe2/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，MoSe2/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 mm3/(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%。

关键词: 纳米复合材料, 不锈钢, 异质结, 自润滑, 石墨烯

CLC Number:

TH117.2

YAN Songshan1, XIAO Zhengli1, MAO Ya1, HU Rui2. Friction Reduction Mechanism of MoSe2/Graphene-Stainless Steel Self-lubricating Materials[J]. China Mechanical Engineering, 2024, 35(07): 1151-1155.

燕松山1, 肖正力1, 毛娅1, 胡瑞2. MoSe₂/石墨烯不锈钢自润滑材料的减摩机理[J]. 中国机械工程, 2024, 35(07): 1151-1155.

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