aliphatic ester, aliphatic alcohol, stainless steel, cold rolling oil Abstract: In this paper, the deeply hydrogenated mineral oil 60N was used as base oil. The additives such as mixture of dodecanol and tetradecyl alcohol, hexadecanol alcohol, octadecyl alcohol, ethyl hydride laurate, methyl palmitate and butyl stearate were separately added to the base oil by 10 percent. Evaluate its physical and chemical properties, and cold rolling experiments were carried out on both 202 and 304 stainless steel lubricated by different rolling oil. The results showed that the aliphatic alcohol have better performance in lubricating and volatilizing properties than fatty acid ester. Moreover, the octadecyl alcohol showed the best lubricating properties compared with selected aliphatic alcohol.

Color difference on surface of aluminum alloy stripes when lubricated with oil-water mixtures in cold continuous rolling process was researched. The surface profile, 3D and micro morphology were observed by surface surface profiler, laser scanning confocal microscopeand scanning electron microscope. The chemical composition of aluminum surface was analyzed by X-ray energy dispersive spectrometer, and then the formation mechanism of color difference was studied. The results indicate that lubricated with oil-water mixture, oil and water can't mix sufficiently and lubrication failure was found in deformation zone because of lubrication oil shortage. Working roller and fresh surface of stripes contacted directly and leaded to adhesive, so lots of irregular shaped micro-cracks were found after rolling, the residual composition of oil-water mixture adsorbed in the micro-cracks and not easy to be cleaned up, so the organic matter of residue composition carbonized and manifested as color difference in the visible. The fringes of color difference are distributed approximately along the rolling direction and the average roughness was very nearly the same between different kinds of fringes.