几种极压抗磨剂对聚脲润滑脂摩擦学性能的影响

The Effects of Extreme Pressure-antiwear Additives on Tribological Properties of Polyurea Grease

采用添加T204(硫磷伯仲辛烷基锌盐)、T304(亚磷酸二正丁酯)、A88(酸性硫代磷酸酯铵盐)到制备的聚脲脂中,分别考察了该3种极压抗磨剂对聚脲润滑脂摩擦学性能的影响。结果表明,添加质量分数为1%的T204只能显著地提高聚脲润滑脂的极压性能,极压载荷从基础脂的400 N提高到900 N,提高了125%;添加质量分数为0.5%的T304可使体系的磨损体积较基础脂润滑下减小52%,极压载荷提高幅度达125%;添加质量分数为1%的A88可使体系磨损体积减小58%,极压载荷提高75%。

Putting three kinds of extreme pressure-antiwear additives（T204,T304 and A88） into the same polyurea grease,the effects of three additives on the tribological properties of polyurea grease have been investigated respectively in this paper.The results showed that T204 could only improve significantly the load-carrying capability,when the additive mass fraction of T204 was 1%,its load-carrying capability was greatly improved from 400 N of base grease to 900 N improved by 125%.When the additive mass fraction of T304 was 0.5%,the wear volume of polyurea grease was reduced by 52% and its load-carrying capability was improved by 125%.When the additive mass fraction of A88 was 1%,the wear volume of polyurea grease was reduced by 58% and its load-carrying capability was improved by 75%.