新型无硫、磷有机钼化合物润滑油添加剂对钢/钢摩擦副摩擦磨损性能影响研究

Tribological Behavior of Molybdenum Coordination Compound without Sulfur and Phosphorus as Oil Additive for Steel-steel Contact

合成出1种新的无硫、磷有机钼配位化合物(MCC),采用SRV摩擦磨损试验机评价所制备的有机钼配位化合物作为润滑油添加剂对钢/钢摩擦副摩擦磨损性能的影响,并探讨了其润滑机理.结果表明,所合成的有机钼配位化合物作为润滑油添加剂对钢/钢摩擦副具有较好的抗磨减摩作用,使钢/钢摩擦副的摩擦系数降低,磨损体积损失减小.磨损表面分析表明,在载荷和剪切力作用下,MCC在摩擦表面发生了剧烈的摩擦化学反应,并形成具有稳定结构的含钼氧化物化学反应膜,引起磨损表面硬度随载荷增加而增大,从而起到了抗磨减摩作用.

A new kind of molybdenum coordination and evaluated as a promising lubricant additive for compound （MCC） without sulfur and phosphorus was prepared steel-steel contact. Tribological behavior of synthetic MCC as a lubrication additive for a steel-steel contact was comparatively investigated on SRV test rig with （ ball-on-disc configuration）, using paraffin as a comparison. The worn steel surfaces lubricated with paraffin and 1% MCC ＋ paraffin under different loads were observed by scanning electron microscope, and the chemical states of some typical elements on the worn surfaces were analyzed by X-ray photoelectron spectroscopy. It was found that the synthesized MCC in the paraffin base oil significantly reduced friction coefficient and wear rate. Paraffin containing 1wt% MCC additive showed better friction-reducing and anti-wear abilities compared with paraffin without additives. Meanwhile hardness on worn surface, when lubricated with 1% MCC ＋ paraffin, increased during friction and wear process, which contributed to reducing friction and wear of both tribo-pairs. Significant improvement of friction and wear, is due to action of the boundary layer and MCC deposited on the worn steel surface which prevent direct steel-steel contact from severe adhesion, scuffing, and seizure.