Distribution of Si particles in hypereutectic aluminum alloy tubes prepared under electromagnetic field

来源期刊:中国有色金属学报(英文版)2006年第z3期

论文作者:张志清 李丘林 刘伟 刘庆

文章页码:1292 - 1294

Key words:Al-Si alloy; centrifugal casting; electromagnetic field (EMF); gradient distribution

Abstract: Hypereutectic Al-Si alloy tubes were produced by centrifugal casting process using an electromagnetic field (EMF). A gradient distribution of the primary Si particles was formed along the tube thickness direction. In the absence of EMF the primary Si moves to inner periphery with increasing rotation speed. The distribution of primary Si can be controlled by the EMF. With increasing electromagnetic field intensity, the primary Si moves from the inner periphery to the outer periphery of the tubes. Most of the primary Si can be driven to the outer if the electromagnetic field intensity is increased to a certain value. It is found that the particle distribution and local volume fraction vary with both the rotation speed and the electromagnetic field intensity.

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