Quantitative analysis for surface features of aluminum rolling products (Part 2) three-dimensional analysis by atomic force microscope

The influence of rolling speed and rolling oil viscosity on the depth of oi l pits was three-dimensionally and quantitatively analyzed using an atomic force microscope. The depth of the oil pits increased linearly relative to the rolling speed and the rolling oil viscosity. Rolled at a slow speed or with a low-viscosity oil, micropools make the oil pits decrease or even dis appear almost completely. Meanwhile rolled at a high rolling speed or with a high-viscosity oil, the pits became deeper or new oil pits generated. In the case of commercial products, the depth of the oil pits varied greatly w ith a very small increase or decrease in the oil viscosity. This suggests t hat the generation of oil pits might be involved with the fluidity of the r olling oil.