中国铸造2004，Vol.1Issue(1)：45-48,4.
Effects of processing parameters on microstructure of semi-solid magnesium alloy
Effects of processing parameters on microstructure of semi-solid magnesium alloy
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作者信息
- 1. State Key Lab of Mold & Die Technology, Hua zhong University of Science and Technology, Wuhan 430074, Hubei,P.R .China;State Key Lab of Mold & Die Technology, Hua zhong University of Science and Technology, Wuhan 430074, Hubei,P.R .China;State Key Lab of Mold & Die Technology, Hua zhong University of Science and Technology, Wuhan 430074, Hubei,P.R .China;State Key Lab of Mold & Die Technology, Hua zhong University of Science and Technology, Wuhan 430074, Hubei,P.R .China;State Key Lab of Mold & Die Technology, Hua zhong University of Science and Technology, Wuhan 430074, Hubei,P.R .China
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摘要
Abstract
In this paper, the effects of pouring temperature of magnesium melt, preheating temperature of the barrel of the screw mixer, and shear rate on the solidified microstructures of semi-solid slurry were investigated by a mechanical stirring semi-solid process. The appropriate processing parameters of slurry preparation were obtained, and the mold filling ability of semi-solid slurry for thin-walled casting was examined. Results indicate that the solid volume fraction of non-dendritic microstructure increases with a decrease in pouring temperature of magnesium melt and the barrel preheating temperature of the screw mixer. Also the grain size of primary α-phase is reduced. Furthermore, the solid volume fraction of semi-solid nondendritic structure decreases with an increase of shear rate. The fine and round granular microstructure with 30 ～50 μm in size of semi-solid AZ91D magnesium alloy was presented. Finally, a 1.0 mm thin-walled casting with a clear contour and good soundness was successfully made by semi-solid rheo-diecasting.关键词
semi-solid metal/magnesium alloy/rheocasting/slurry/microstructureKey words
semi-solid metal/magnesium alloy/rheocasting/slurry/microstructure分类
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..Effects of processing parameters on microstructure of semi-solid magnesium alloy[J].中国铸造,2004,1(1):45-48,4.
