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首页> 美国卫生研究院文献>Springer Open Choice >Industrial Gear Oils: Tribological Performance and Subsurface Changes
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Industrial Gear Oils: Tribological Performance and Subsurface Changes

机译：工业齿轮油：摩擦学性能和地下变化

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This study examined the tribological performance of three gear oils (Oils A, B and C), in relation to surface and microstructural changes. Oil A contains molybdenum dithiophosphate friction modifier, Oil B contains amine molybdate combined with zinc dialkyl dithiophosphate antiwear additive, while Oil C contains phosphonate and a commercial gear oil package. Following sliding tests of a hardened AISI 52100 steel ball on a spheroidized AISI 52100 steel disc, the worn surfaces were chemically studied using Raman and energy-dispersive X-ray spectroscopy. The tribological performance for each oil was different, likewise the nature of the tribofilm formed. After a 5 min sliding test, the hardness-depth profile of the worn surfaces was measured; also the cross-sectional microstructure was examined using scanning electron microscopy combined with focused ion beam preparation and transmission electron backscattered diffraction (t-EBSD) techniques. With Oil A, there was a relatively small increase in surface hardness (33% greater than that of the unworn surface), whereas with Oils B and C, the average hardness near the surface was 100% greater than that of the unworn surface. The cross-sectional microstructure using Oil A also differed from Oils B and C, which were quite similar. The result shows that with Oil A refinement of the ferrite grains spreads deeper into the material (> 10 µm), whilst with Oils B and C it was largely limited to 2–3 µm below the surface. It is concluded that the lubricant formulations and their associated tribofilms influenced the extent of deformation in the subsurface layers and consequently influenced the wear performance.
机译：这项研究检查了三种齿轮油（油A，B和C）与表面和微观结构变化相关的摩擦学性能。油A包含二硫代磷酸钼摩擦改进剂，油B包含钼酸胺与二烷基二硫代磷酸锌抗磨添加剂结合，而油C包含膦酸酯和市售齿轮油套件。在球化的AISI 52100钢制圆盘上对硬化的AISI 52100钢球进行滑动测试之后，使用拉曼光谱仪和能量色散X射线光谱学对磨损的表面进行了化学研究。每种油的摩擦学性能都不同，同样形成的摩擦膜的性质也不同。经过5分钟的滑动测试后，测量了磨损表面的硬度深度分布;还使用扫描电子显微镜结合聚焦离子束制备和透射电子背散射衍射（t-EBSD）技术检查了截面显微结构。对于油A，表面硬度的增加相对较小（比未磨损表面高33％），而对于油B和C，其表面附近的平均硬度比未磨损表面高100％。使用油A的横截面微观结构也与油B和C不同，后者非常相似。结果表明，使用油A时，铁素体晶粒的细化会更深地扩散到材料中（> 10 µm），而使用油B和C时，铁素体晶粒的细化程度最大被限制在表面以下2-3 µm。结论是，润滑剂配方及其相关的摩擦膜影响了地下层的变形程度，因此影响了磨损性能。

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