Centrifugal casting processes of manufacturing in situ functionally gradient composite materials of

• 作 者: XIE Yong LIU Changming ZHAI Yanbo WANG Kai LING Xuedong
• 机 构: College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China
• 出 处: 稀有金属（英文版）
• 发表日期: 2009年4期
• 关键词: centrifugal casting Al-Si-Mg alloys Mg2Si particles silicon particles functional

Cylindrical components of in situ functionally 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 character-istics 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.