铝冷轧乳化液润滑性能研究

Study on Lubrication Properties of Emulsion in the Process of Cold-rolling Aluminum

研究铝冷轧乳化液润滑性能,分析水基乳化液体积分数对黏度、钢铝之间的摩擦因数、冷轧铝表面质量、成膜能力的影响。结果表明:乳化液体积分数较低时摩擦因数不稳定,表面黏铝严重;乳化液体积分数越高,黏度越大,膜厚越大;摩擦副相对速度达到某个临界值后,乳化液形成的膜厚随着时间而减小,在低速条件下,冷轧铝润滑与离水展着性有关;冷轧铝板上下表面质量的差异是由于供油方式不同,导致油吸附在摩擦副上的量不同,成膜能力不同,因此上、下表面质量不同。

The lubrication properties of emulsion in the process of cold-rolling aluminum were studied. The effects of water content of emulsion on the friction coefficient, the surface quality of cold-rolled aluminum and the ability of films formation were discussed. The results show that low concentrations of emulsion results in friction coefficient instability and surface quality deteriorated. The emulsion with high concentration has big viscidity and can generate thicker lubricating film. When the relative speed of friction pairs reaches a critical speed, emulsion film will decrease with time. In low speed range scale, lubrication characteristics is related to emulsion plate-out. Different emulsion supply method leads to different oil attachment on roll, upper and opposite surface of aluminum sheet, so different film thickness results in different surface quality.