Roll bending during rolling can be the cause and the solution for flatness defects through differential rolling across the strip width. This work aims to evaluate the effect of skin pass roll bending in flatness changes of hot rolled strips. This was done through industrial experiments with process parameters changings of rolling force and bending forces in the skin pass mill, correlating the estimated result of roll bending with the observed flatness changes. The results confirmed the relationship between roll bending and flatness, practically without flatness changes when the cross section of the strip and the roll bending was coherent and with flatness changes increasing with the increase of this incoherence.
flatness; skin pass rolling; steel
