Influence of the RE on the P Modified Hypereutectic Al-Si Alloy

Ouyang Zhiying  Mao Xiemin  Tang Duoguang  Zhang Jinlong  Wang Haijiang  Hou Xu

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Influence of the RE on the P Modified Hypereutectic Al-Si Alloy
Issue 1, Pages: 22-23(2003)
Published： 2003 ，
DOI：

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[1]欧阳志英,毛协民,唐多光,张金龙,王海江,侯旭.稀土对过共晶Al-Si合金P变质效果的影响[J].特种铸造及有色合金,2003(01):22-23+2.

Ouyang Zhiying Mao Xiemin Tang Duoguang Zhang Jinlong Wang Haijiang Hou Xu. Influence of the RE on the P Modified Hypereutectic Al-Si Alloy. [J]. Special Casting & Nonferrous Alloys (1):22-23(2003)
[1]欧阳志英,毛协民,唐多光,张金龙,王海江,侯旭.稀土对过共晶Al-Si合金P变质效果的影响[J].特种铸造及有色合金,2003(01):22-23+2. DOI：

Ouyang Zhiying Mao Xiemin Tang Duoguang Zhang Jinlong Wang Haijiang Hou Xu. Influence of the RE on the P Modified Hypereutectic Al-Si Alloy. [J]. Special Casting & Nonferrous Alloys (1):22-23(2003) DOI：

摘要

研究了加入稀土元素La对P变质Al 18Si合金中Si的形态及尺寸的影响

结果表明 :稀土元素La的加入优化了P的变质效果

在细化初晶Si的同时变质了共晶Si

并且明显减缓了P变质初晶Si的粗化趋势

使变质效果至少可维持 6h以上

通过扫描电镜测定了稀土元素La在合金中的分布

并分析讨论了稀土元素La对P变质效果影响的机理和作用。

Abstract

The effects of La-RE on the morphology and size of Si in P modified Al-18Si alloy were examined. The results showed that La-RE can enhance P modified effect. Addition of both La-RE and P can not only refine the primary Si but also modify eutectic Si. Moreover

the coarsening tendency of P-La RE modified primary Si in hypereutectic Al-Si alloy was weakened significantly and the modification fading can be extended for 6 h longer. The distribution of La-RE in the alloy was determined by SEM. The mechanism of La-RE effects on P modification was analyzed and approached.