Effects of Trace Rare Earth on Modification of Fe-rich Impurity Phase in Aluminum Sheet for Easy-open Can

Chen Yonglu; Fu Gaosheng; Li Yong; Chen Wenzhe

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Effects of Trace Rare Earth on Modification of Fe-rich Impurity Phase in Aluminum Sheet for Easy-open Can
Issue 1, Pages: 22-25(2006)
Published： 2006 ，
DOI：

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[1]陈永禄,傅高升,李勇,陈文哲.微量RE对易拉罐用铝材中富Fe杂质相的变质作用[J].特种铸造及有色合金,2006(01):22-25+2.

Chen Yonglu, Fu Gaosheng, Li Yong, et al. Effects of Trace Rare Earth on Modification of Fe-rich Impurity Phase in Aluminum Sheet for Easy-open Can. [J]. Special Casting & Nonferrous Alloys (1):22-25(2006)
[1]陈永禄,傅高升,李勇,陈文哲.微量RE对易拉罐用铝材中富Fe杂质相的变质作用[J].特种铸造及有色合金,2006(01):22-25+2. DOI：

Chen Yonglu, Fu Gaosheng, Li Yong, et al. Effects of Trace Rare Earth on Modification of Fe-rich Impurity Phase in Aluminum Sheet for Easy-open Can. [J]. Special Casting & Nonferrous Alloys (1):22-25(2006) DOI：

摘要

在易拉罐用铝材熔体中添加微量RE元素对富Fe杂质相进行变质处理

采用扫描电镜（SEM）、X-Ray衍射（XRD）、能谱分析（EDAX）等分析测试手段研究杂质相的变质效果。结果表明RE聚集于基体晶界

可通过与Al生成富Fe相异质形核核心、影响溶质原子扩散过程和杂质相生长方式、取代富Fe相中部分组成元素以降低x（Fe）/x（Mn）的比值等途径提高富Fe相形核率

并促使其生长形态发生变化

变质效果显著

即晶界处由粗大鱼骨状的Al（Fe

Si）复合相转变为Al（Fe

RE）和Al（Fe

RE）复合相

分别呈短小骨骼状或小球状

可明显提高该合金的塑性。

Abstract

Modification of Fe-rich impurity phases in the a-luminum sheet for easy-open can was performed by adding trace RE

and effects of modification were examined by means of SEM

X-ray diffusion and ED AX. The results show that RE gathered in matrix grain boundary improves the nucleation rate of Fe-rich phase and promotes the growth change

and it takes obvious modification effects through the following approaches including forming Fe-rich heterogeneous nuclei with Al melt

influencing the diffusion progress of solute atom and growth way of the impurity phase

substituting some composition in Fe-rich phase to reduce the Fe/Mn ratio. The coarse fish-skeleton Al（Fe

Si） compound phase is transformed into short-small skeleton or round Al （Fe

RE） and Al （Fe

Mn. RE ） complex phase

which will improve the plasticity of the alloy remarkably.