Influence of RE Element Y on Morphology of Primary Phase in A356 Aluminum Alloy

Liu Zheng; Hu Yongmei

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Influence of RE Element Y on Morphology of Primary Phase in A356 Aluminum Alloy
Issue 4, Pages: 271-273(2007)
Published： 2007 ，
DOI：

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[1]刘政,胡咏梅.Y对A356铝合金半固态初生相形貌的影响[J].特种铸造及有色合金,2007(04):271-273+242.

Liu Zheng, Hu Yongmei. Influence of RE Element Y on Morphology of Primary Phase in A356 Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys (4):271-273(2007)
[1]刘政,胡咏梅.Y对A356铝合金半固态初生相形貌的影响[J].特种铸造及有色合金,2007(04):271-273+242. DOI：

Liu Zheng, Hu Yongmei. Influence of RE Element Y on Morphology of Primary Phase in A356 Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys (4):271-273(2007) DOI：

摘要

利用低过冷度浇注工艺制备了A356铝合金半固态浆料

研究了稀土Y对合金半固态初生相形貌的影响。采用正交设计方法

优化了A356铝合金半固态初生相形貌的影响因素

通过直观分析与方差分析表明

经稀土Y变质处理及低过冷度浇注获得A356半固态初生球晶的最佳工艺条件:浇注温度为595℃

保温时间为3min

Y的加入量为0.5%。此时其晶粒在铸态下的形状因子为0.7

等积圆直径为49.6μm

其中浇注温度是晶粒形貌和尺寸的最主要影响因素

可信度达到95%;其次是Y的加入量和保温时间。

Abstract

The influence of RE Y on morphology of primary phase in A356 semi-solid aluminum alloy prepared by the low under-cooled pouring method has been investigated. The factors influencing morphology of primary phase in semi-solid A356 aluminum alloy slurry were optimized by orthogonal design. By intuitional and square difference analysis

the primary phase with shape coefficient of 0.7 and equal-area-circle diameters of 49.6μm in the semi-solid A356 aluminum alloy slurry can be observed with 0.3% Y addition and filling at 595 ℃ for 3 min. The dominant influential factors are pouring temperature with the reliability of 95%

then the Y content and holding time.