Preparation of Mg-Al/Al Gradient Composites by Continuous Casting

Xu Feng; Zhang Weiwen; Luo Zongqiang; Kang Zhixin; Li Yuanyuan

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Preparation of Mg-Al/Al Gradient Composites by Continuous Casting
Issue 8, Pages: 624-626(2007)
Published： 2007 ，
DOI：

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[1]许峰,张卫文,罗宗强,康志新,李元元.连续铸造制备Mg-Al/Al梯度复合材料的试验研究[J].特种铸造及有色合金,2007(08):624-626+572.

Xu Feng, Zhang Weiwen, Luo Zongqiang, et al. Preparation of Mg-Al/Al Gradient Composites by Continuous Casting. [J]. Special Casting & Nonferrous Alloys (8):624-626(2007)
[1]许峰,张卫文,罗宗强,康志新,李元元.连续铸造制备Mg-Al/Al梯度复合材料的试验研究[J].特种铸造及有色合金,2007(08):624-626+572. DOI：

Xu Feng, Zhang Weiwen, Luo Zongqiang, et al. Preparation of Mg-Al/Al Gradient Composites by Continuous Casting. [J]. Special Casting & Nonferrous Alloys (8):624-626(2007) DOI：

摘要

采用双流浇注半连续铸造方法制备了一种内层设计成分为镁合金、外层成分为纯铝的Mg-Al/Al梯度复合材料。试验表明

采用双流浇注连续铸造技术可以实现内层镁合金和外层纯铝之间的冶金结合

并且可在两层之间形成成分和硬度梯度分布的过渡层。所制备的合金材料在成分分布、宏观组织以及硬度分布之间有较好的对应关系。但由于两种合金的密度相差较大

容易导致内、外浇包熔体的剧烈混合

使得内层合金成分变化很大。

Abstract

The Mg-Al/Al gradient composites with the magnesium in internal layer and pure aluminum in external layer have been prepared by double-streaming-pouring techniques. The results show that the metallurgical bonding can be generated between magnesium alloy and pure aluminum

and the gradient distributed transition zone of the components and hardness can be observed in the composites. In addition

the prepared composites possess a desirable responding relationship among the composition

macro-structure and hardness. However

the sharp density difference between the Mg alloy and pure aluminum can cause the dramatic mixture of the two melts to result in the sharp composition variation of the internal alloy.