Investigation on the springback of high strength steel
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Wenyu Ma, Jianwei Yang, Xuebin Zheng, Yongqiang Zhang, Baochuan Wang
In this study, the investigation on the high strength steel produced by Shougang Group was conducted. The material investigated in this study includes DP780 and DP1180. The material was cut into square and printed with mark points for strain analysis. The blank was bended into several angles and measured the springback angle and strain distribution. The following analysis was conducted. The results show that the springback angle increases with the decrease of bending angle. The material of DP1180 has an obvious springback behavior. The strain distribution can be measured after bending experiment using strain marking points printed and measure equipment. In terms of DP780, the maximum strain increases with the decrease of the bending angle. And the maximum strain is about 14.1% with the bending angle of 30°. In terms of DP1180, the maximum strain and bending angle don’t show a linear trend. And the maximum strain is about 15.9% with the bending angle of 30°.
Springback, high strength steel, DP1180, strain