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在 SRV微动磨损试验机上 ,采用阶梯升温方式研究了全配方汽油发动机油 SJ/CF/5 W- 30对几种不同摩擦副的润滑作用 ,并采用激光拉曼分子光谱仪分析了润滑油的摩擦炭化行为 .结果表明 :在连续升温的摩擦磨损过程中 ,摩擦系数曲线出现明显波谷 ,且波谷现象随摩擦副材料类型的不同而不同 ,其中钼合金喷涂层 /铸铁摩擦副的波谷现象最为显著 .通过对润滑油摩擦炭化物进行激光拉曼光谱分析发现 ,其 G线峰位、峰宽以及石墨微晶尺寸 (L a)均同摩擦副材料类型相关 ;炭化物石墨微晶尺寸 (L a)同波谷处摩擦系数亦存在对应关系 ,其中钼合金喷涂层 -铸铁摩擦副对应的润滑油摩擦炭化产物的石墨微晶尺寸最大 ,相应的波谷处摩擦系数最低
In the SRV fretting wear tester, the lubricating effect of the fully formulated gasoline engine oil SJ / CF / 5 W-30 on several different friction pairs was studied by stepwise temperature rising method. The friction of lubricating oil was analyzed by laser Raman spectrometer The results show that the curve of friction coefficient shows obvious wave trough during the process of friction and wear with continuous temperature increase, and the wave trough phenomenon varies with the type of friction pair material, among which the wave valley phenomenon of the molybdenum alloy spray coating / cast iron friction pair is the most significant. Laser Raman spectroscopy analysis showed that the G-line peak position, peak width and graphite crystallite size (L a) were related to the type of friction material. The graphite crystallite size (L a) There is also a corresponding relationship between the friction coefficient, which molybdenum alloy spray coating - cast iron friction corresponding to the friction carbonization product graphite crystallite size, the corresponding trough lowest friction coefficient