Analysis and Improvement of Warpage Cause of High Strength Steel in Commercial Vehicle

Abstract

Abstract Aiming at the warping problem in high strength steel of commercial vehicle, it is concluded that the flatting machine is the main factor leading to the warpage of the strip through the plate shape tracking experiment, the reason for the deterioration of the warpage with the increase of yield strength is expounded. Analysis points out that the difference of the friction coefficient between the upper and lower rollers and the difference of the roller diameter will result in the deterioration of the plasticity after leveling. According to the high strength characteristic of the automobile steel, the measures for improving the original plate shape, reducing flat rolling pressure and the diameter difference of the work roller are developed, good application results have been obtained.