AZ31镁合金管材挤压成型数值模拟与实验研究

发布时间：2018-03-25 10:19

本文选题：AZ镁合金　切入点：挤压模具　出处：《材料工程》2017年06期

【摘要】：运用基于AZ31镁合金本构方程与ALE算法的HyperXtrude软件对典型AZ31薄壁管材的挤压过程进行数值模拟,并通过调整焊合室高度、焊合室大圆角及焊合室坡度3个结构参数,分析不同条件下应力分布与速率分布的变化情况。结果表明:焊合室内近工作带处压力随焊合室高度增加不断减小,分流孔与焊合室压力的最大值与平均值均随焊合室大圆角增大发生降低,分流孔与焊合室压力随焊合室入口坡度增大不断增大,并在焊合室高度为16mm、大圆角为18mm以及入口坡度为15°时金属流速均方差达到最小值。优化模具结构缓解了应力集中与流速不均等问题,在实验生产中得到合格产品,型材组织均匀细化。
[Abstract]:The extrusion process of typical AZ31 thin-walled pipe was simulated by HyperXtrude software based on AZ31 magnesium alloy constitutive equation and ALE algorithm. Three structural parameters, including the height of welding chamber, the large angle of welding chamber and the slope of welding chamber, were adjusted. The variation of stress distribution and rate distribution under different conditions is analyzed. The results show that the pressure near the working zone of the welding chamber decreases with the increase of the height of the welding chamber. The maximum and average pressure of the split hole and the welding chamber decrease with the increase of the large angle of the welding chamber, and the pressure of the split hole and the welding chamber increases with the increase of the inlet slope of the welding chamber. And when the height of welding chamber is 16mm, the large circle angle is 18mm and the inlet slope is 15 掳, the mean square deviation of metal velocity reaches the minimum. The optimization of die structure alleviates the problem of stress concentration and uneven flow velocity, and obtains qualified products in experimental production. The structure of the profile is uniform and refined.
【作者单位】：中国科学院上海微系统与信息技术研究所轻合金技术工程中心;
【基金】：嘉兴市重大科技专项(2010AZ2001)
【分类号】：TG379

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