| 稀土元素镧对AZ91镁合金显微组织及硬度的影响 |
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| 引用本文： | 裴利霞,张金山,高义斌,许春香,韩富银,王红霞,赵兴国,梁伟. 稀土元素镧对AZ91镁合金显微组织及硬度的影响[J]. 铸造设备研究, 2005, 0(1): 20-22 |
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| 作者姓名： | 裴利霞 张金山 高义斌 许春香 韩富银 王红霞 赵兴国 梁伟 |
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| 作者单位： | 太原理工大学材料科学与工程学院,山西太原030024 |
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| 摘 要： | 研究了稀土镧对AZ91合金的显微组织和硬度的影响.结果表明:加入稀土镧后,AZ91合金铸态晶粒细化,且Mg17Al12相减少;大部分镧与铝结合生成高熔点、高热稳定性的针状稀土相(Al11La3),从而改善晶界相的分布,提高铸态宏观硬度;固溶 时效处理后,在晶界处析出片层状Mg17Al12相.随时效时间的延长,硬度进一步增加.
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| 关 键 词： | AZ91镁合金 显微组织 宏观硬度 稀土镧 人工时效 |
| 文章编号： | 1004-6178(2005)01-0020-03 |
| 修稿时间： | 2004-09-26 |
The Effect of La on Microstructure and Macro-hardness of AZ91 Magnesium Alloy |
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| PEI Li-xia,ZHANG Jin-Shan,GAO Yi-bin,XU Chun-xiang,HAN Fu-yin,WANG Hong-xia,ZHAO Xing-guo,LIANG Wei. The Effect of La on Microstructure and Macro-hardness of AZ91 Magnesium Alloy[J]. Research Studies On Foundry Equipment, 2005, 0(1): 20-22 |
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| Authors: | PEI Li-xia ZHANG Jin-Shan GAO Yi-bin XU Chun-xiang HAN Fu-yin WANG Hong-xia ZHAO Xing-guo LIANG Wei |
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| Abstract: | The effect of La on microstructure and macro-hardness of AZ91 alloy was studied in the paper. The experiment shows that addition of La results in as-cast grain refinement and the amount of Mg_(17)Al_(12) phase decreases. Most of La reacts with aluminum to form needle compounds of Al_(11)La_3 with high melting point and elevated temperature stability in the grain boundary,and the macrohardness of as-cast is improved. After solid solution and aging treatment, sheet Mg_(17)Al_(12) phase separates out in the grain boundary. With the increase of aging time,the macro-hardness of AZ91 alloy further increased. |
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| Keywords: | AZ91 magnesium alloy microstructure macro-hardness La aging |
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