| EFFECTS OF MISCHMETAL ADDITION ON THE CAST MICROSTRUCTURE OF 6063 ALLOYS |
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| 作者姓名： | 刘晶元 丁培道 潘复生 周守则 |
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| 作者单位： | 南京航空航天大学材料科学与工程系，重庆大学冶金及材料工程系 |
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| 摘 要： | 采用光镜，电镜，阳极复膜等手段研究了稀土对６０６３合金铸态组织的影响。结果表明，稀土细化枝晶组织有一临界含量，这个临界含量约为０．１５％ＲＥ。当稀土含量大于０．１５％时，稀土才会减小二次枝晶间距并细化共晶组织。而稀土细化晶粒在低含量时最为明显。从铸态组织考虑，６０６３合金中加入０．２０％ＲＥ为宜。
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| 关 键 词： | 铸态组织 混合稀土 变形铝合金 二次枝晶间距 晶粒 |
EFFECTS OF MISCHMETAL ADDITION ON THE CAST MICROSTRUCTURE OF 6063 ALLOYS |
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| Liu Jingyuan.EFFECTS OF MISCHMETAL ADDITION ON THE CAST MICROSTRUCTURE OF 6063 ALLOYS[J].Transactions of Nanjing University of Aeronautics & Astronautics,1997(1). |
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| Authors: | Liu Jingyuan |
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| Institution: | Liu Jingyuan Department of Materials Science and Engineering,NUAA29 Yudao Street,Nanjing 210016,P. R. China Ding Peidao Pan Fusheng Zhou Shouze Department of Metallurgy and Material EngineeringChongqing University Chongqing 630044,P. R. China |
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| Abstract: | Effect of mischmetal addition on the cast microstructure of 6063 alloys has been investigated by means of optical microscopy, TEM and anode filming etc. The results show that there is a critical content of fining dendrite structure by adding mischmetal to 6063 alloys. This critical mischmetal content is about 0.15%. Only when the mischmetal content is above 0.15%, the secondary dendrite arm spacing decreased and eutectic structure fined. The cast grain is obviously refined when the content of mischmetal is lower. Consideration from the cast structure, the suitable mischmetal content in 6063 alloys is 0.20%. |
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| Keywords: | cast structure mischmetal deforming aluminum alloy secondary dendrite arm spacing grain |
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