| 自孕育铸造对AM60镁合金晶粒细化的影响 |
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| 引用本文： | 邢博,李元东,马颖,曲俊峰,张鹏,郝远.自孕育铸造对AM60镁合金晶粒细化的影响[J].铸造,2010,59(4). |
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| 作者姓名： | 邢博 李元东 马颖 曲俊峰 张鹏 郝远 |
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| 作者单位： | 1. 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州,730050
2. 兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州,730050;兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州,730050 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，甘肃省国际科技合作计划资助项目 |
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| 摘 要： | 利用新型自孕育铸造工艺制备AM60镁合金半固态坯料,研究了自孕育铸造对合金组织的细化效果。试验结果表明,在最佳工艺参数组合下,自孕育铸造组织晶粒细小均匀,尺寸主要分布在20～50μm,晶粒平均等效圆直径达到35μm。对自孕育铸造过程中初生相形核和长大过程分析认为,孕育剂的加入促进了非均质形核效应,导流器的激冷、剪切作用促进了激冷晶的形成和树枝晶的破碎,两过程使合金凝固时晶粒增殖,抑制长大机制促进了合金组织的细化。
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| 关 键 词： | AM60镁合金 自孕育铸造 晶粒细化 晶粒度 |
Effect of Self-Inoculation Cast on Grain Refinement of AM60 Magnesium Alloy |
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| XING Bo,LI Yuan-dong,MA Ying,QU Jun-feng,ZHANG Peng,HAO Yuan.Effect of Self-Inoculation Cast on Grain Refinement of AM60 Magnesium Alloy[J].Foundry,2010,59(4). |
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| Authors: | XING Bo LI Yuan-dong MA Ying QU Jun-feng ZHANG Peng HAO Yuan |
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| Affiliation: | XING Bo1,LI Yuan-dong1,2,MA Ying1,QU Jun-feng1,ZHANG Peng1,HAO Yuan1 (1. StateKeyLab.ofGansuAdvancedNon-ferrousMetalMaterials,LanzhouUniversityofTechnology,Lanzhou 730050,Gansu,China,2. Key Lab. of Non-ferrous Metal Alloys and Processing,Ministry of Education,Lanzhou University of Technology,China) |
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| Abstract: | The semi-solid AM60 billet was prepared by the novel self-inoculation method,and the effect of self-inoculation method on microstructure of the alloy was investigated.Experiment results show that under the optimIzed Process parameters,the grains are fine and homogeneously distributed;the grain size mainly in the range of 20-50 μm and the average size is 35 μm.Further analysis show that the heterogeneous nucleation was enhanced as the addition of inoculation;the formation of chill crystal and the fragmentation of dendrites were promoted by cooling and shearing action of the cooling channel,which resulting in the increase of grains density and a small grain size. |
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| Keywords: | AM60 magnesium alloy self-inoculation cast grain refinement grain size |
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