Abstract In this study, manganese phosphate conversion coatings of different thicknesses are prepared on the AISI 52100 steel surface. The tribological properties of the coatings are investigated using an SRV-V multifunctional tribometer, and the microstructure and interfacial components are analyzed through scanning electron microscopy and energy-dispersive X-ray spectroscopy. The results show that the friction coefficients of Mn–P[B] and Mn–P[H] coatings are reduced by 6% and 15%, respectively. Moreover, the EP load resistance is improved by 37% with low-viscosity lubrication oil. Under a high load, the Mn–P coatings may affect the wear mechanism of matching steel surfaces and reduce their degree of wear. The wear surface is smooth and has several uniform oil-storage holes, which are crucial to oil film formation and sustained wear resistance.

中文翻译：

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AISI 52100钢上不同晶粒尺寸的油润滑磷酸锰转化涂层的摩擦学和摩擦行为比较

摘要 本研究在AISI 52100钢表面制备了不同厚度的磷酸锰转化膜。使用SRV-V多功能摩擦计研究涂层的摩擦学性能，并通过扫描电子显微镜和能量色散X射线光谱分析微观结构和界面成分。结果表明，Mn-P[B]和Mn-P[H]涂层的摩擦系数分别降低了6%和15%。此外，使用低粘度润滑油后，EP 负载阻力提高了 37%。在高负荷下，Mn-P 涂层可能会影响匹配钢表面的磨损机制并降低其磨损程度。磨损表面光滑，有多个均匀的储油孔，对油膜的形成和持续的耐磨性至关重要。