真空压铸镁合金减震塔的组织和性能

王雪杨; 李子昕; 胡波; 李德江; 曾小勤

doi:10.15980/j.tzzz.2022.04.015

研究·合金工艺 | 浏览量 : 0 下载量: 55 CSCD: 0

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真空压铸镁合金减震塔的组织和性能
Microstructure and Properties of Vacuum Assisted High Pressure Die Casting Magnesium Alloy Shock Tower
2022年42卷第4期页码：467-472
纸质出版日期： 2022 ，
DOI： 10.15980/j.tzzz.2022.04.015

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王雪杨, 李子昕, 胡波, 等. 真空压铸镁合金减震塔的组织和性能[J]. 特种铸造及有色合金, 2022,42(4):467-472.

Wang Xueyang, Li Zixin, Hu Bo, et al. Microstructure and Properties of Vacuum Assisted High Pressure Die Casting Magnesium Alloy Shock Tower[J]. Special Casting & Nonferrous Alloys, 2022,42(4):467-472.
王雪杨, 李子昕, 胡波, 等. 真空压铸镁合金减震塔的组织和性能[J]. 特种铸造及有色合金, 2022,42(4):467-472. DOI： 10.15980/j.tzzz.2022.04.015.

Wang Xueyang, Li Zixin, Hu Bo, et al. Microstructure and Properties of Vacuum Assisted High Pressure Die Casting Magnesium Alloy Shock Tower[J]. Special Casting & Nonferrous Alloys, 2022,42(4):467-472. DOI： 10.15980/j.tzzz.2022.04.015.

摘要

采用OM、SEM和EDS等表征手段真空压铸镁合金减震塔微观组织和力学性能。使用EKKCapcast软件模拟了压铸充型过程，对比了减震塔不同位置的孔隙率，进而分析了造成铸件卷气的原因。结果表明，冲头的高低速切换位置在560～600 mm之间变化时，对减震塔的力学性能影响可以忽略。从拉伸断口分析发现气孔是导致减震塔局部位置力学性能较低的原因；并借助模拟有效地预测了可能发生卷气的位置以及卷气的严重程度。

Abstract

The mechanical properties of the vacuum assisted high pressure die casting magnesium alloy shock towers were analyzed by tensile testing

and its microstructure were analyzed by SEM

OM and EDS. The vacuum assisted high pressure die casting filling process was simulated using EKKCapcast software

and the porosity of different positions of the shock towers were compared

and then the origination of air entrapment in the casting was analyzed. The results reveal that the mechanical properties of shock towers are little affected when the switchover position is varied between 560 mm and 600 mm. The analysis of the tensile fracture reveals that the gas pore is responsible for the low mechanical properties of the shock towers at the local location. The possible location and severity of air entrapment were predicted effectively by means of simulation.