Optimization of processing parameters for rheo-casting AZ91D magnesium alloy

来源期刊:中国有色金属学报(英文版)2008年增刊第1期

论文作者:王亚宝 徐骏 杨必成 张志峰

文章页码:91 - 95

Key words:AZ91D; rheo-casting; processing parameters; optimization

Abstract: A design of experiment technique was used to optimize the microstructure of the AZ91D alloy produced by rheo-casting. The experimental design consists of four parameters (pouring temperature, shearing temperature, shearing time and shearing rate) with three levels. The grain size and shape factor measurements of primary α-Mg particles were conducted to determine the microstructure. The contribution of each parameter shows that pouring temperature is the most significant parameter affecting the grain size, and the shape factor highly depends on the shearing temperature. The optimized rheo-casting processing parameters are 650 ℃ for pouring temperature, 585 ℃ for shearing temperature, 40 s for shearing time, and 600 r/min for shearing rate. Under the optimized processing parameters, the average grain size is 28.53 μm, and the shape factor is 0.591.

基金信息:supported by the National Basic Research Program of China
the National Hi-tech Research and Development Program of China

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