Abstract
The shape change of surface micro-defects in plate rolling was investigated using a rigid-plastic finite element analysis. Rolling of plate with rectangular-shaped scratches or plunges, which lay perpendicular to the rolling direction, was simulated. The influence of rolling conditions, such as reduction, friction coefficient, roll diameter and pass schedule on the shape of existing defect after rolling was evaluated. From these results, the relationship between the shapes of surface defect before and after rolling was obtained, and the optimum condition to eliminate defects was discussed. The proposed prediction method of surface defect can be utilized to make defect free products in rolling and forging processes.
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