| 镁合金减震塔的真空压铸研究 |
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| 引用本文： | 林凌,曾小勤,丁文江.镁合金减震塔的真空压铸研究[J].特种铸造及有色合金,2010,30(3). |
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| 作者姓名： | 林凌 曾小勤 丁文江 |
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| 作者单位： | 上海交通大学轻合金精密成型国家工程研究中心,金属基复合材料国家重点实验室 |
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| 基金项目： | 上海市启明星跟踪计划资助项目 |
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| 摘 要： | 研究并对比了真空压铸生产的AZ91D和AM60合金减震塔铸件的微观组织、力学性能,考察了热处理工艺对其性能的影响。结果表明,AZ91D和AM60真空压铸件组织均由基体α-Mg和Mg17Al12相组成,固溶处理后Mg17Al12相消失,时效处理后其以非连续相形式析出。AZ91D和AM60铸件均能够热处理强化,但是AM60合金的强化效果弱于AZ91D合金。另外,真空压铸能有效消除铸件中的气孔,但无法完全消除缩松现象,不过仍可通过热处理提高真空压铸件的力学性能。
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| 关 键 词： | 镁合金 AZ91D合金 AM60合金 真空压铸 热处理 |
Production of Magnesium Alloy Shock Absorption Tower by Vacuum Die Casting |
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| Lin Ling,Zeng Xiaoqin,Ding Wenjiang.Production of Magnesium Alloy Shock Absorption Tower by Vacuum Die Casting[J].Special Casting & Nonferrous Alloys,2010,30(3). |
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| Authors: | Lin Ling Zeng Xiaoqin Ding Wenjiang |
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| Affiliation: | Lin Ling,Zeng Xiaoqin,Ding Wenjiang(National Engineering Research Center of Light Alloy Net Forming,State Key Laboratory of Metal Matrix Composites,Shanghai Jiaotong University,Shanghai,China) |
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| Abstract: | Microstructure and mechanical properties of AZ91D shock absorption tower and AM60 shock absorption tower produced by vacuum die casting were analyzed comparatively, and effects of heat treatment were examined. Microstructures of both AZ91D and AM60 magnesium alloy parts are composed of α-Mg matrix and β-Mg_(17)Al_(12) phase, in which β-Mg_(17)Al_(12) phase disappears after solid solution and it is precipitated as discontinuous phase after aging treatment. Although both AZ91D and AM60 alloy parts can be strengthened by heat treatment, strengthening effect on AZ91D alloy parts are superior to that on AM60 alloy parts. In addition, gas hole in the parts can be effectively eliminated, however, shrinkage defects can not completely eliminated by vacuum die casting. Mechanical properties of the vacuum die casting parts can be greatly improved after heat treatment. |
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| Keywords: | Magnesium Alloy AZ91D Alloy AM60 Alloy Vacuum Die Casting Heat Treatment |
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