| 镁合金零件压铸过程裂纹成因及数值模拟 |
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| 引用本文： | 曹文炅,周照耀,余敏强,吴苑标,夏伟.镁合金零件压铸过程裂纹成因及数值模拟[J].科学技术与工程,2009,9(18). |
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| 作者姓名： | 曹文炅 周照耀 余敏强 吴苑标 夏伟 |
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| 作者单位： | 华南理工大学机械与汽车工程学院,广州,510640 |
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| 基金项目： | 粤港关键领域重点突破项目，广东省重大科技专项，国家基础研究计划1973课题 |
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| 摘 要： | 薄壁镁合金件裂纹缺陷制约着其应用,其成因受多方面因素影响.通过虚拟仿真技术,考察了某薄壁镁合金件压铸充型凝固过程的温度场,凝固过程中产生的热应力,及其对裂纹成因的影响.通过数值分析得出AZ91D铸件裂纹的产生与铸件孔洞类缺陷及凝固收缩不一致产生的应力有关,分析结果与实验一致.以数值分析结果为依据,提出了改进方案.
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| 关 键 词： | 数值模拟 高压铸造 镁合金 裂纹 |
| 收稿时间： | 2009/6/11 0:00:00 |
| 修稿时间： | 6/20/2009 5:08:55 PM |
Numerical Simulation of Magnesium Alloy's Crack Behavior in HPDC Process |
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| CAO Wen-Jiong,ZHOU Zhao-Yao,YU Ming-Qiang,WU Yuan-Biao and XIA Wei.Numerical Simulation of Magnesium Alloy's Crack Behavior in HPDC Process[J].Science Technology and Engineering,2009,9(18). |
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| Authors: | CAO Wen-Jiong ZHOU Zhao-Yao YU Ming-Qiang WU Yuan-Biao and XIA Wei |
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| Institution: | School of Mechanical & Automotive Engineering, South China University of Technology,School of Mechanical & Automotive Engineering, South China University of Technology,School of Mechanical & Automotive Engineering, South China University of Technology,School of Mechanical & Automotive Engineering, South China University of Technology |
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| Abstract: | The crack defects of thin-walled magnesium components can restrain the development of magnesium alloys' application, which are influenced by many factors.By virtue of simulation, the component's temperature distributions were shown and discussed, The thermal stress distributions in solidification process were obtained, and the influence facts of crack were investigated. The observation via numerical simulation illustrates that the crack behaviour of die cast AZ91D is influenced by porosity defects and inconsistent solidification tensile stresses. The results of simulation are in good agreement of the product from the experimentation. According to the results, some suggestions are given to improve the qualities of the components. |
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| Keywords: | numerical simulation high pressare die custiugl HPDC magnesium alloy crack |
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