有机钼添加剂对重载装备柴油机油减摩抗磨性能的影响

发布时间：2018-01-08 21:20

本文关键词：有机钼添加剂对重载装备柴油机油减摩抗磨性能的影响　出处：《润滑与密封》2016年12期 　论文类型：期刊论文

【摘要】：针对某重载装备所用柴油机油CD~+/10W-40减摩抗磨性能不足的问题,分别添加不同含量的二烷基二硫代磷酸钼(MoDDP)、二烷基二硫代氨基甲酸钼(MoDTC)和钼胺络合物(Mo-A)3种油溶型有机钼添加剂,通过SRV摩擦磨损试验机考察其减摩抗磨性能,通过激光显微镜、SEM、EDS、XPS对磨痕进行形貌观察及元素分析,并分析其减摩抗磨机制。结果表明:不同种类的有机钼在柴油机油中均能降低摩擦因数,但其减摩抗磨效果不尽相同,其中,0.8%质量分数的MoDTC在柴油机油中的减摩抗磨效果最佳,摩擦因数降低约53.3%,磨损体积减小约26.9%,而Mo-A反而使磨损增大。机制分析表明MoDDP和MoDTC在摩擦表面分解生成了含MoS_2、MoO_3等的化学反应膜和化学沉积膜,起到了减摩抗磨作用;而钼胺络合物在磨损表面没有形成含钼的摩擦保护膜,而是形成了磨粒,因而增大了磨损。
[Abstract]:In order to solve the problem of insufficient anti-friction and antiwear performance of diesel engine oil CD- / 10W-40 used in a heavy duty equipment, different contents of molybdenum dialkyl dithiophosphate (MoDDP) were added respectively. Three oil-soluble organic molybdenum additives, molybdenum dithiocarbamate (MoDTC) and molybdenum amine complex, were studied by SRV friction and wear tester. The morphology and elemental analysis of wear marks were observed by means of SEM EDS- XPS. The results show that different kinds of organic molybdenum can reduce the friction coefficient in diesel engine oil, but its antiwear effect is not the same. MoDTC with 0.8% mass fraction has the best antiwear effect in diesel engine oil, the friction coefficient is reduced about 53.3%, and the wear volume is reduced about 26.9%. The mechanism analysis shows that MoDDP and MoDTC decompose on the friction surface to form chemical reaction film and chemical deposition film containing MoS _ 2Moo _ 3 and so on. It has the function of reducing friction and antiwear; But the molybdenum amine complex does not form the molybdenum containing friction protective film on the wear surface, but forms the abrasive particle, thus increases the wear.
【作者单位】：装甲兵工程学院装备再制造技术国防科技重点实验室;
【分类号】：U473.6
【正文快照】： 重载车辆装备发动机具有功率密度高、运行工况恶劣的特殊性,使用过程中都存在大量的摩擦、磨损失效技术难题。而发动机中所使用的柴油机油在边界润滑状态的承载能力、抗磨和减摩性能主要取决于润滑油添加剂在摩擦表面形成的物理、化学吸附膜和化学反应膜。因此,选择性能优异

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