| AZ31和AZ91镁合金等温挤压及挤压后的微观组织变化 |
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| 引用本文： | 李洪波,吕玫,马文昌.AZ31和AZ91镁合金等温挤压及挤压后的微观组织变化[J].塑性工程学报,2011,18(6). |
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| 作者姓名： | 李洪波 吕玫 马文昌 |
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| 作者单位： | 燕山大学 机械工程学院,秦皇岛,066004 |
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| 摘 要： | 通过等温挤压和金相观察,研究了AZ31和AZ91镁合金不同变形条件下的挤压性能和变形后的微观组织变化。结果表明,AZ31镁合金的挤压变形性能较好,而AZ91镁合金在挤压比为4∶1、挤压温度为400℃,以及在挤压比为9∶1、挤压温度为350℃和400℃时,挤压后的试件表面均出现了裂纹;AZ31镁合金的最佳成形温度为300℃～400℃,AZ91镁合金的最佳成形温度为300℃～350℃;镁合金在热挤压过程中发生了动态再结晶,挤压之后合金的晶粒显著细化。
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| 关 键 词： | 镁合金 挤压 微观组织 |
The isothermal extrusion and the microstructure evolution after extrusion of AZ31 and AZ91 magnesium |
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| LI Hong-bo,LU Mei,MA Wen-chang.The isothermal extrusion and the microstructure evolution after extrusion of AZ31 and AZ91 magnesium[J].Journal of Plasticity Engineering,2011,18(6). |
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| Authors: | LI Hong-bo LU Mei MA Wen-chang |
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| Affiliation: | LI Hong-bo LU Mei MA Wen-chang(College of Mechanical Engineering,Yanshan University,Qinhuangdao 066004 China) |
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| Abstract: | The extrusion property and microstructure evolution of AZ31 and AZ91 magnesium alloy under different deformation conditions were studied in isothermal extrusion process and through metallographic examination.The results show that the forming quality of AZ31 magnesium alloy is better than AZ91 magnesium alloy.For AZ91,the cracks would appear on the specimen surface at extrusion ratio 4∶1,extrusion temperature 400℃,and at extrusion ratio 9∶1,extrusion temperature 350℃ and 400℃.The best forming temperature for AZ31 is 300℃～400℃,for AZ91 is 300℃～350℃.Dynamic recrystallization occurred in the hot extrusion process of the magnesium alloy,the grain of extruded samples were significantly refined. |
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| Keywords: | magnesium alloy extruding microstructure evolution |
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