| Mn-30Al中间合金对镁合金的晶粒细化 |
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| 引用本文： | 曹凑先,李建国,谭敦强,胡燕辉.Mn-30Al中间合金对镁合金的晶粒细化[J].特种铸造及有色合金,2010,30(1). |
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| 作者姓名： | 曹凑先 李建国 谭敦强 胡燕辉 |
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| 作者单位： | 1. 南昌大学材料科学与工程学院
2. 清华大学材料科学与工程系 |
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| 基金项目： | "十一五"国家科技支撑计划项目，国家自然科学基金资助项目，广东省教育部产学研结合项目 |
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| 摘 要： | 采用真空淬火炉制备出含ε-AlMn相的Mn-30Al中间合金和含γ_2-Al_8Mn_5相的Mn-30Al中间合金,观察了两种中间合金的组织,并探讨ε-AlMn相、γ_2-Al_8Mn_5相、Mn和Al对镁合金的晶粒细化效果.试验表明,相比添加Mn、Al,含γ_2-Al_8Mn_5相的Mn-30Al中间合金对AZ31镁合金存在一定的细化效果,含ε-AlMn相的Mn-30Al中间合金对AZ31镁合金具有更好的细化效果.当含ε-AlMn相的Mn-30Al中间合金添加量为0.4%时,AZ31镁合金的晶粒尺寸由原来的898μm减小至320 μm,Mg-Zn合金晶粒尺寸由原来的320 μm减小至180μm.通过面错配度计算,ε-AlMn可以成为初生α-Mg晶粒的良好异质形核核心.
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| 关 键 词： | 镁合金 ε-AlMn相 晶粒细化 喷铸 ε-AlMn Phase |
Grain Refining Effects of Mn-30Al Master Alloy on Magnesium Alloy |
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| Cao Couxian,Li Jianguo,Tan Dunqiang,Hu Yanhui.Grain Refining Effects of Mn-30Al Master Alloy on Magnesium Alloy[J].Special Casting & Nonferrous Alloys,2010,30(1). |
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| Authors: | Cao Couxian Li Jianguo Tan Dunqiang Hu Yanhui |
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| Affiliation: | Cao Couxian1,Li Jianguo2,Tan Dunqiang1,Hu Yanhui1(1.School of Materials Science , Engineering,Nanchang University,Nanchang,China,2.Department of Materials Science , Engineering,Tsinghua University,Beijing,China) |
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| Abstract: | The master alloy Mn-30Al containing ε-AlMn phase and the Mn-30Al alloy containing γ_2-Al_8Mn_5 phase were prepared by vacuum quenching furnace, and microstructure of two kinds of master alloys were observed, meanwhile, effects of ε-AlMn phase, γ_2-Al_8Mn_5 phase, Mn and Al on grain refinement of magnesium alloy were analyzed. The results reveal that refining effects of Mn-30Al master alloy containing ε-AlMn phase on the magnesium alloy are obviously superior to Mn-30Al alloy containing γ_2-Al_8Mn_5 phase, Mn, Al. With 0. 4% Mn-30Al master alloy containing ε-AlMn phase , grain size of AZ31 magnesium alloy and Mg-Zn alloy are decreased from 898 μm to 320 μrn and from 320 μm to 180 μm, respectively. ε-AlMn phase can be acted as desirable heterogeneous nucleithrough surface misfit calculation. |
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| Keywords: | Magnesium Alloy Grain Refinement Spraying Deposition |
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