Centrifugal casting processes of manufacturing in situ functionally gradient composite materials of Al-19Si-5Mg alloy
Centrifugal casting processes of manufacturing in situ functionally gradient composite materials of Al-19Si-5Mg alloy
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DOI：
10.1007/s12598-009-0079-2
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发表时间：
2009-07
期刊：
影响因子：
8.8
通讯作者：
Yong Xie;Chang-ming Liu;Yanbo Zhai;Kai Wang;X. Ling
中科院分区：
文献类型：
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作者：
Yong Xie;Chang-ming Liu;Yanbo Zhai;Kai Wang;X. Ling
采用离心铸造法制备了Al-19Si-5Mg合金梯度梯度复合材料的圆柱形构件。观察了零件的显微组织特征，并分析了工艺因素对这些特征的影响。结果表明：在厚度上，各组分的显微组织在内层积聚了大量的Mg2Si颗粒和一部分原生硅颗粒，外层积聚了少量的Mg2Si颗粒和原生硅颗粒，中间层没有Mg2Si颗粒和原生硅颗粒。分析结果表明，离心铸造转速、模具温度和熔体浇注温度对第二相颗粒的积累有明显影响。离心转速、模具温度和熔体浇注温度越高，Mg2Si和初生硅颗粒在内层的堆积程度越明显。
Cylindrical components ofin situfunctionally gradient composite materials of Al-19Si-5Mg alloy were manufactured by centrifugal casting. Microstructure characteristics of the manufactured components were observed and the effects of the used process factors on these characteristics were analyzed. The results of observations shows that, in thickness, the components possess microstructures accumulating lots of Mg2Si particles and a portion of primary silicon particles in the inner layer, a little Mg2Si and primary silicon particles in the outer layer, and without any Mg2Si and primary silicon particle in the middle layer. The results of the analysis indicate that the rotation rate of centrifugal casting, mould temperature, and melt pouring temperature have evidently affected the accumulation of the second phase particles. Also, the higher the centrifugal rotation rate, mould temperature, and melt pouring temperature are, the more evident in the inner layer the degree of accumulation of Mg2Si and primary silicon particles is.