AZ31镁合金薄板在热态下的成形极限图及其应用

Forming Limit Diagram and Application of AZ31 Magnesium Alloy Sheet

摘要:

采用板材热成形试验机BCS-50AR及网格应变自动测量系统GMA System，获得了AZ31镁合金薄板在150~250℃温度范围内的成形极限图（FLD）。分别将实验获得的FLD及软件自带的Keeler’s方程作为利用DYNAFORM模拟时的破裂判据，模拟研究了AZ31镁合金筒形件在150~250 ℃温度范围内的拉深过程，并将模拟结果与AZ31镁合金的等温拉深实验结果进行了比较。结果表明： FLD作为DYNAFORM模拟时的破裂判据，能更好地预测AZ31镁合金薄板成形过程中的破裂问题

Abstract:

The hot sheet formability test machine and the grid measurement and analysis system were used to determine the forming limit diagram (FLD) of AZ31 magnesium alloy sheet in the forming temperature range of 150~250 °C. The deep drawing processes were simulated using DYNAFORM with the FLD and Keeler’s function as broken criterion respectively in the forming temperature range of 150~250 °C. In order to validate the simulated results, the deep drawing tests were also performed. The results show that breaking can be predicted more precisely in the forming process using the FLD as the broken criterion than using auto Keeler’s broken criterion when simulating with DYNAFORM