表面技术2017，Vol.46Issue(7)：97-103,7.DOI:10.16490/j.cnki.issn.1001-3660.2017.07.016
几种添加剂在锂基润滑脂中的极压协同性能及表面摩擦行为研究
Extreme Pressure Synergistic Properties and Tribological Behaviors of Several Additives in Lithium Greases
摘要
Abstract
The work aims to improve extreme pressure properties of lubricating greases by optimizing compound proportion of different additives. Three kinds of additives, antimony dialkyldithiocarbamate (SbDTC), zinc dialkyldithiophosphate (ZDDP), sulfurized isobutylene (SE), were used to form 10 formulas in different proportions in the method of three component simp-lex-centroid design. Extreme pressure property and adaptability of different additive formulas in three base greases were eva-luated using Timken wear tester, so as to select the formula with extreme pressure synergistic effect, and elemental chemical state and depth distribution on worn surface reaction film were analyzed using X-ray photoelectron spectroscopy (XPS). Ex-treme pressure properties of the three base greases could be improved by formula 1—7 to varying degrees, lithium-based greases (N-Li) exhibited better adaptability in naphthenic-based oil. Formula 5 (SbDTC and SE compounded in equal proportion) exhi-bited the best extreme pressure property in base greases with Timken OK load of 315 N, film thickness measured by XPS of 20~30 nm and higher content of Sb and S in the reaction film. Formula 6 (ZDDP and SE compounded in equal proportion) exhi-bited the worst extreme pressure in base greases with 135 N Timken OK load of below 135 N, and it showed counteraction. For formula 8—10, when compound ratio of the three constituents was changed, the formulas varied a lot in extreme pressure prop-erties. The higher the proportion of SbDTC concentration was, the more obvious the effect on improving grease extreme pres-sure properties. the compound ratio of the 3 additives has a great influence on its extreme pressure properties, SbDTC exhibits favorable extreme pressure synergistic properties when being mixed with SE and ZDDP in equal proportion. The extreme pres-sure properties of the additives are related to thickness of the lubricating film formed on the wear surface and content of active elements, especially Sb and S content on the surface.关键词
添加剂/润滑脂/极压性能/协同/摩擦反应膜/元素含量Key words
additive/lubricating grease/extreme pressure properties/synergy/tribological reaction film/element content分类
矿业与冶金引用本文复制引用
辛永亮,胡建强,杨士钊,郭力,张健健..几种添加剂在锂基润滑脂中的极压协同性能及表面摩擦行为研究[J].表面技术,2017,46(7):97-103,7.基金项目
国家自然科学基金项目(51575525) （51575525）
江苏省自然科学基金(BK20141123,BK20151137) （BK20141123,BK20151137）
清华大学摩擦学国家重点实验室开放基金(SKLTKF14B10)Supported by the Natural Science Foundation of china (51575525) （SKLTKF14B10）
Natural Science Foundation of Jiangsu Province (BK20141123, BK20151137) and the State Key Laboratory of Tribology, Tsinghua University Foundation (SKLTKF14B10) （BK20141123, BK20151137）
