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.
XIN Yong-liang,HU Jian-qiang,YANG Shi-zhao,GUO Li,ZHANG Jian-jian.Extreme Pressure Synergistic Properties and Tribological Behaviors of Several Additives in Lithium Greases[J].Surface Technology,2017,46(7):97-103 |
| 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 |
| 投稿时间：2017-02-06 修订日期：2017-07-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.07.016 |
| 中文关键词: 添加剂 润滑脂 极压性能 协同 摩擦反应膜 元素含量 |
| 英文关键词:additive lubricating grease extreme pressure properties synergy tribological reaction film element content |
| 基金项目:国家自然科学基金项目（51575525）；江苏省自然科学基金（BK20141123，BK20151137）；清华大学摩擦学国家重点实验室开放基金（SKLTKF14B10） |
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| Author | Institution |
| XIN Yong-liang | Cadet Brigade 1, Air Force Logistics College, Xuzhou 221000, China |
| HU Jian-qiang | Department of Aviation Oil and Material, Air Force Logistics College, Xuzhou 221000, China |
| YANG Shi-zhao | Department of Aviation Oil and Material, Air Force Logistics College, Xuzhou 221000, China |
| GUO Li | Department of Aviation Oil and Material, Air Force Logistics College, Xuzhou 221000, China |
| ZHANG Jian-jian | Cadet Brigade 1, Air Force Logistics College, Xuzhou 221000, China |
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| 中文摘要: |
| 目的 通过优化不同添加剂复配比例以提高润滑脂的极压性能。方法 采用三阶单纯形-重心设计法，将二烷基二硫代氨基甲酸锑（SbDTC）、二烷基二硫代磷酸锌（ZDDP）和硫化异丁烯（SE）3种添加剂按不同比例形成10种配方，利用梯姆肯摩擦试验机评价不同添加剂配方在三种基础润滑脂中的极压性能和适应性，从而筛选具有极压协同效应的配方，并通过X射线光电子能谱仪（XPS）对磨斑表面反应膜的元素化学状态和深度分布进行分析。结果 配方1—7均能不同程度地改进3种基础润滑脂的极压性能，尤其在环烷基基础油的锂基润滑脂（N-Li）中具有较好的适应性。其中，配方5（SbDTC与SE等比例复配）在基础润滑脂的极压性能最好，梯姆肯OK值达到315 N，XPS测得其反应膜厚度为20~30 nm，反应膜中的Sb、S含量较高；配方6（ZDDP与SE等比例复配）在基础润滑脂中的极压性能较差，OK值在135 N以下，表现出对抗作用。配方8—10中改变3组分复配比例后，不同配方的极压性能差异比较大，其中SbDTC浓度比例越高，对改进润滑脂极压性能的效果越明显。结论 3种添加剂的复配比例对其极压性能的影响较大，其中SbDTC与SE和 ZDDP等比例复配后，具有良好的极压协同性能。添加剂的极压性能与摩擦表面形成的润滑膜厚度和活性元素的含量相关，尤其是表面Sb、S元素含量高低对极压性能影响较大。 |
| 英文摘要: |
| 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 simplex-centroid design. Extreme pressure property and adaptability of different additive formulas in three base greases were evaluated 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). Extreme 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) exhibited 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) exhibited 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 properties. The higher the proportion of SbDTC concentration was, the more obvious the effect on improving grease extreme pressure 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 pressure 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. |
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