摘要
为改善锂基脂极压抗磨性能使其适应于更为苛刻的工矿条件,合成了一系列单胺基双巯基三嗪衍生物,使用四球机考察了添加剂在锂基脂中的极压、抗磨、减摩性能。结果表明,此类添加剂均能改善锂基脂的极压、抗磨、减摩性能,碳链最短的2-二正丁胺基-4,6-二巯基-1,3,5-均三嗪(DBAT)的极压性能表现最佳,能够使锂基脂的pB值提高约50%,在不同负荷或不同质量分数的条件下DBAT表现出了最好的抗磨效果。使用SEM与XPS分析钢球表面典型元素的分布情况与化学态,发现由无机硫酸盐、硫化亚铁及有机含氮化合物所组成的保护膜可能是摩擦学性能提高的主要原因。
To improve the extreme pressure and anti-wear properties of Li grease, a series of 2-amino-4,6-dimercapto- 1, 3,5-s-triazine derivatives were synthesized. Their tribological properties were evaluated by the four-ball tester, which reveals that all of the additives could improve the tribological properties especially under the low concentration （mass fraction 1% to 2% ） conditions and the high pressure （more than 294 N） conditions. The 2-dibutylamino-4,6-dimercapto-striazine shows the excellent tribological properties, with its PB values 50% higher than Li grease alone and the best antiwear properties under various pressure conditions. The typical wear scar was analyzed by SEM and XPS. The result shows that the complex combination, such as sulfate, ferrous sulfide and triazine derivatives＇ decomposed fragments, might be the key reason for the improvement of the tribological properties.
出处
《润滑与密封》
EI
CAS
CSCD
北大核心
2006年第12期116-119,共4页
Lubrication Engineering
关键词
三嗪衍生物
锂基脂
摩擦学性能
添加剂
triazine derivatives
Li grease
tribological properties
additives
