| Al-5C中间合金对AZ31镁合金的细化机理 |
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| 引用本文： | 张爱民,郝海,张兴国.Al-5C中间合金对AZ31镁合金的细化机理[J].中国有色金属学会会刊,2013,23(11):3167-3172. |
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| 作者姓名： | 张爱民 郝海 张兴国 |
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| 作者单位： | 大连理工大学材料科学与工程学院,大连116023 |
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| 基金项目： | Project （2011921065） supported by Liaoning BaiQianWan Talents Program, China; Pr,4iect （DUTIIZDII5） supported by the Fundamental Research Funds for the Central Universities, China |
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| 摘 要： | 采用粉末原位合成工艺制备Al-5C中间合金，研究Al-5C中间合金对AZ31镁合金晶粒细化的影响及细化机理。结果表明：Al-5C中间合金由α（Al）和 Al 4 C 3两相组成，Al 4 C 3颗粒的尺寸分布由烧结时间控制。Al-5C中间合金能显著地细化AZ31镁合金晶粒尺寸，当Al-5C中间合金添加量低于2%时，随着Al-5C中间合金添加量的增加，AZ31镁合金晶粒尺寸减小。晶粒细化机理是由于 Al4C3与 Mn 反应生成的Al-C-Mn 颗粒能作为初生α-Mg晶粒的异质形核基底，从而细化晶粒。
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| 关 键 词： | AZ31镁合金 晶粒细化 Al-5C中间合金 Al—C—Mn化合物 |
| 收稿时间： | 22 October 2012 |
Grain refinement mechanism of A1-5C master alloy in AZ31 magnesium alloy |
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| Ai-min ZHANG,Hai HAO,Xing-guo ZHANG.Grain refinement mechanism of A1-5C master alloy in AZ31 magnesium alloy[J].Transactions of Nonferrous Metals Society of China,2013,23(11):3167-3172. |
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| Authors: | Ai-min ZHANG Hai HAO Xing-guo ZHANG |
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| Affiliation: | School of Materials Science and Engineering, Dalian University of Technology, Dalian 116023, China |
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| Abstract: | Al-5C master alloy was prepared by powder in situ synthesis process, and its effects on grain refinement of AZ31 alloy and refining mechanism were investigated. The results indicate that the AI 5C master alloy consists of a（Al） and A14C3 phases, and the size distribution of Al4C3 particles is controlled by sintering time. The AI 5C master alloy can remarkably reduce the grain size of AZ31 alloy, which decreases with the increasing addition amount of AI-SC master alloy when the addition amount is below 2%. The refining mechanism is attributed to the formation of new compounds of Al-C-Mnparticles by Al4C3 and Mn, which might act as nucleating substrates for a-Mg grain. |
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| Keywords: | AZ31 magnesium alloy grain refinement AI-SC master alloy AI C Mn compounds |
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