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本文主要研究了 Co-Cr_2O_3高温耐磨复合镀层中 Cr_2O_3颗粒含量和工艺参数(电流密度、pH 值、颗粒浓度、搅拌状态、温度)之间的关系,确定最隹共沉积工艺条件.阐明了颗粒含量和热处理对镀层和结构的影响,测量了45~(?)钢及 Co-Cr_2O_3复合镀层在室温到400℃范围内的磨损率.应用金相显微镜、显微硬度计、图像分析仪及 SEM、XRD 等手段,研究了镀层的结构,观察了镀层形貌,探讨了磨损机理.Co-Cr_2O_3复合镀层的高温耐磨性能归因于在摩擦过程中 Cr_2O_3颗粒在摩擦面上富集,承载负荷,同时 CoO 和高温下 Co 的转变相α-Co 具有干润滑性能,降低了摩擦系数.
In this paper, the relationship between the content of Cr 2 O 3 particles and the process parameters (current density, pH value, particle concentration, stirring state and temperature) in Co-Cr 2 O 3 high temperature wear-resistant composite coating was mainly studied to determine the most common deposition process conditions. Content and the effect of heat treatment on the coating and structure, wear rate of 45 ~ (?) Steel and Co-Cr_2O_3 composite coatings were measured at room temperature to 400 ℃ .Microscope, microhardness tester, image analyzer and SEM , XRD and other means, the structure of the coating was studied, the morphology of the coating was observed and the wear mechanism was discussed.The high temperature wear resistance of the Co-Cr 2 O 3 composite coating was attributed to the enrichment of Cr 2 O 3 particles on the friction surface during the friction process, , While CoO and Co at high temperature transformation phase α-Co has a dry lubricating properties, reducing the friction coefficient.