Effects of Pulsed Electric Current with Main Frequency and Low Voltage on Grain Refinement of Pure Aluminum

Fang Yan; Liao Xiliang; Gan Changhong; Gong Yongyong; Zhai Qijie

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Effects of Pulsed Electric Current with Main Frequency and Low Voltage on Grain Refinement of Pure Aluminum
Issue 3, Pages: 141-143(2006)
Published： 2006 ，
DOI：

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[1]方燕,廖希亮,甘长红,龚勇永,翟启杰.中频低压脉冲电流对纯铝凝固组织的影响[J].特种铸造及有色合金,2006(03):141-143+125-126.

Fang Yan, Liao Xiliang, Gan Changhong, et al. Effects of Pulsed Electric Current with Main Frequency and Low Voltage on Grain Refinement of Pure Aluminum. [J]. Special Casting & Nonferrous Alloys (3):141-143(2006)
[1]方燕,廖希亮,甘长红,龚勇永,翟启杰.中频低压脉冲电流对纯铝凝固组织的影响[J].特种铸造及有色合金,2006(03):141-143+125-126. DOI：

Fang Yan, Liao Xiliang, Gan Changhong, et al. Effects of Pulsed Electric Current with Main Frequency and Low Voltage on Grain Refinement of Pure Aluminum. [J]. Special Casting & Nonferrous Alloys (3):141-143(2006) DOI：

摘要

通过调整脉冲电流峰值和脉冲频率

研究了中频低压脉冲电流对纯铝凝固组织的影响。试验结果表明:中频低压脉冲电流可使纯铝的凝固组织由柱状晶转变为等轴晶

电流峰值在500

000A、脉冲频率在100

000Hz范围内

随着脉冲电流峰值和脉冲频率的提高

等轴晶不断细化

等轴晶晶区面积增大。

Abstract

Effects of pulsed electric current with main frequency and low voltage on solidification structure of pure aluminum were investigated by the adjustment of peak intensity and frequency of pulsed current. The results reveal that the pulsed current with main frequency and low voltage can convert column crystal into equiaxed crystal in solidification of pure aluminum ranging in 500

000 A of current peak value and 100

000 Hz of frequency. With the increase of current peak value and frequency

equiaxed crystal is remarkably refined and its area is broadened.