Preparation of Semi-Solid Slurry of Hypereutectic Al-Si Alloy by Ultrasonic Vibration

被引：26

作者：

Zhao, Junwen ^{[1
]}

Wu, Shusen ^{[1
]}

An, Ping ^{[1
]}

Mao, Youwu ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China

来源：

SEMI-SOLID PROCESSING OF ALLOYS AND COMPOSITES X | 2008年 / 141-143卷

关键词：

ultrasonic vibration; hypereutectic Al-Si alloy; semi-solid metal; mechanical property;

D O I：

10.4028/www.scientific.net/SSP.141-143.767

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The preparation of semi-solid slurry of hypereutectic Al-Si alloy by Ultrasonic Vibration (USV) has been studied. The A390 alloy melt was poured into a preheated metal cup, and subsequently the ultrasonic vibrator was dipped into the melt and USV was imposed. The solidified microstructure of the slurry has been analyzed, and the mechanical properties of the alloy have been tested by making samples through diecasting of the slurry. The results show that the primary Si particles of A390 alloy became finer, rounder and uniformly distributed in microstructure of A390 alloy slurry if imposed with USV. and average diameter of primary Si particles was about 20 mu m. With USV, the ultimate tensile strength and the hardness of rheo-casted samples increased by over 25% and near 50% respectively besides the elongation rose by above 100%. After heat treatment, the mechanical properties were further improved. In addition, the mechanism of preparation of semi-solid slurry of hvpereutectic Al-Si alloy by USV is discussed.

引用

页码：767 / 771

页数：5

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