Study on Solidification Segregation of Al-20Sn Monotectic Alloy

Zhang Peng  Du Yunhui  Zeng Daben

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Study on Solidification Segregation of Al-20Sn Monotectic Alloy
Issue 2, Pages: 79-80(2001)
Published：2001
DOI：
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[1]张鹏,杜云慧,曾大本,崔建忠.Al-20%Sn轴瓦合金凝固偏析的研究[J].特种铸造及有色合金,2001(02):79-80+2. DOI：

Zhang Peng Du Yunhui Zeng Daben. Study on Solidification Segregation of Al-20Sn Monotectic Alloy[J]. Special Casting & Nonferrous Alloys, 2001, (2): 79-80. DOI：

摘要

提出了消除Al 2 0 %Sn轴瓦合金宏观偏析的局部偏析思想

通过采用Al 2 0 %Sn半固态浆料进行常规铸造

实现了Sn的局部偏析

确定了Sn的偏析与半固态浆料固相率之间的关系

并且得到了消除Sn宏观偏析的技术条件。研究结果表明

随着Al 2 0 %Sn半固态浆料固相率增大

Sn的宏观偏析程度逐渐减小

并且当半固态浆料固相率大于 3 0 %时

局部偏析消除了宏观偏析

Abstract

Spot segregation idea for the macro segregation removal of Al 20Sn monotectic alloy was presented. The macro segregation of Sn has been substituted by the spot segregation using Al 20Sn semi solid mushy for conventional casting. The results showed that macro segregation degree decreased gradually while the full spot segregation appeared with the increase of solid fraction more than 30%.