含纳米镍粉齿轮油摩擦学性能研究

发布时间：2018-05-06 14:42

本文选题：齿轮油 + 纳米镍粉　；参考：《润滑与密封》2016年03期

【摘要】：为提高传统齿轮油的摩擦学性能,选择高速剪切和纳米镍粉表面修饰相结合的分散方式制备含纳米镍粉的齿轮油,采用四球试验机研究高速剪切转速和时间、KH560分散剂及纳米镍粉加入量对齿轮油摩擦学性能的影响,并采用SEM和EDS等对磨斑形貌和成分进行分析表征,初步探讨其抗磨减摩机制。结果表明:高速剪切转速为3 000r/min,剪切时间为30 min,分散剂KH560质量分数为6%时,纳米镍粉在齿轮油可的分散效果最好;纳米镍粉质量分数为0.5%时,齿轮油综合摩擦学性能较好,摩擦因数和磨斑直径较未添加镍粉的齿轮油分别下降25.5%和22.6%;含纳米镍粉齿轮油在不同载荷下均具有较好的减摩性能,但只在较低压力下具有较好的抗磨性能。磨痕形貌及能谱分析结果表明:在摩擦过程中含纳米镍粉齿轮油中的纳米镍粉能起到填平犁沟、修复磨痕表面的作用。
[Abstract]:In order to improve the tribological properties of traditional gear oil, gear oil containing nano-nickel powder was prepared by high speed shear and surface modification of nano-nickel powder. The effects of high speed shear speed and time of KH 560 dispersant and the amount of nano nickel powder on the tribological properties of gear oil were studied by four ball tester. The morphology and composition of wear spot were analyzed and characterized by SEM and EDS, and the mechanism of antiwear and friction reduction was preliminarily discussed. The results show that when the high speed shear speed is 3 000 r / min, the shear time is 30 min, and the mass fraction of dispersant KH560 is 6, the dispersion effect of nano nickel powder in gear oil is the best, and when the mass fraction of nano nickel powder is 0.5, the overall tribological properties of gear oil are better. The friction coefficient and wear spot diameter of gear oil decreased by 25. 5% and 22. 6% than that of gear oil without nickel powder, respectively, and the gear oil containing nano nickel powder had better antifriction performance under different loads, but had better antiwear performance only at lower pressure. The results of wear trace morphology and energy dispersive spectrum analysis show that the nano-nickel powder in gear oil containing nano-nickel powder can fill the ploughing groove and repair the surface of the wear mark during the friction process.
【作者单位】：南京工业大学材料科学与工程学院;
【基金】：江苏高校优势学科建设工程项目(苏政办2011-6) 广西科技成果转化与推广计划项目(1298009-15)
【分类号】：TH117

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