| 不同淬火冷却介质对高锌7系铝合金组织性能的影响 |
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| 引用本文： | 戴晓元,罗奕兵,石志豪,熊亮.不同淬火冷却介质对高锌7系铝合金组织性能的影响[J].矿冶工程,2012,32(6):107-109. |
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| 作者姓名： | 戴晓元 罗奕兵 石志豪 熊亮 |
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| 作者单位： | 1.长沙理工大学 汽车与机械工程学院, 湖南 长沙 410114;
2.北京科技大学 新金属材料国家重点实验室, 北京 100083 |
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| 基金项目： | 湖南省自然科学基金资助项目(12JJ2023);
新金属材料国家重点实验室开放基金资助项目(2010Z-03) |
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| 摘 要： | 采用透射电镜组织观察和力学性能测试, 研究了3种淬火冷却介质对含Zn量为8.9%的7系铝合金力学性能和微观组织的影响。研究表明采用室温水淬火冷却, T6时效后合金强度硬度最高、晶内细小弥散析出相最多、粗大平衡相最少; 采用空气淬火冷却, T6时效后合金强度硬度最低、晶内析出的粗大平衡相最多; 采用沸水冷却淬火T6时效, 合金强度硬度介于空冷淬火和室温水淬火之间, 晶内粗大析出相的量少于空冷淬火。
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| 关 键 词： | 淬火冷却介质 TEM组织 7系铝合金 |
| 收稿时间： | 2012-06-08 |
Effects of Quenching Mediums on Microstructures and Mechanical Properties of 7 Series Al Alloys with High Zn Content |
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| DAI Xiao-yuan,LUO Yi-bing,SHI Zhi-hao,XIONG Liang.Effects of Quenching Mediums on Microstructures and Mechanical Properties of 7 Series Al Alloys with High Zn Content[J].Mining and Metallurgical Engineering,2012,32(6):107-109. |
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| Authors: | DAI Xiao-yuan LUO Yi-bing SHI Zhi-hao XIONG Liang |
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| Affiliation: | 1.School of Automobile and Mechanic Engineering, Changsha University of Science and Technology, Changsha 410004, Hunan, China;
2.State Key Laboratory for Advanced Metals and Materials, University of Science & Technology Beijing, Beijing 100083, China |
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| Abstract: | The effects of three quenching mediums on microstructures and mechanical properties of 7 series Al alloys(with 8.9% Zn content) have been investigated by transmission electron microscope(TEM) and mechanics properties testing. When the quenching medium is room-temperature water, the tensile strength and hardness of the studied alloy are the highest, and the quantity of the fine precipited phase is the largest while that of the coarse equilibrium phase is the smallest after T6 ageing. The tensile strength and hardness of the studied alloy after T6 ageing are the lowest while the quantity of the coarse equilibrium phase is the largest when air is used as the quenching medium. When boiling water is used for quenching, after T6 ageing, the strength and hardness of the alloy is between those of dry quenching and room-tempeature quenching while the quantity of the coarse equilibrium phase is smaller than that of the dry quenching. |
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| Keywords: | quenching medium TEM structure 7 series Al alloys |
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