阻尼冷却作用对负压吸铸镁合金铸件的影响

张小立; 谢水生; 李廷举; 杨浩强; 金俊泽

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阻尼冷却作用对负压吸铸镁合金铸件的影响
Influence of Damper-cooling on Near-liquidus Suction Casting AZ91 Alloy
2007年第S1期页码：130-132
纸质出版：2007
DOI：
稿件说明：

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[1]张小立,谢水生,李廷举,杨浩强,金俊泽.阻尼冷却作用对负压吸铸镁合金铸件的影响[J].特种铸造及有色合金,2007(S1):130-132. DOI：

Zhang Xiaoli1 Xie Shuisheng2 Li Tingju1 Yang Haoqiang Jin Junze1. Influence of Damper-cooling on Near-liquidus Suction Casting AZ91 Alloy[J]. Special Casting & Nonferrous Alloys, 2007, (S1): 130-132. DOI：

摘要

试验研究在负压吸铸低过热度镁合金熔体工艺中

施加阻尼冷却作用对成形铸件的影响。由于阻尼冷却作用

流动的合金熔体中产生细小的初生α（Mg）相

充入型腔时以半固态浆料的形式注入

半固态浆料具有的触变性能使得流动前端以圆钝的封闭形式充型

因此得到表面质量高

内部结构密实的铸件。阻尼冷却管作用下得到的铸件微观结构由初生相和共晶混合物组成

但是析出相β-Mg17Al12的含量高于没有阻尼冷却作用下得到的铸件。

Abstract

In order to semisolid processing alloy directly from liquid metal

a damper-cooling tube was applied in near-liquidus suction casting AZ91 magnesium alloy in this investigation.Castings showed a good surface quality and integral structure in comparison with that of castings without using a damper-cooling tube.The reason for this was that semisolid slurry was produced due to damper-cooling effect

which is supported by the microstructure consisting of fine primary α-Mg particles and eutectic mixture.However

the content of precipitate phase is more than that of castings formed without a damper cooling tube.