Research on the Microstructure and Properties of Hypereutectic Al-24Si Alloy Stirred by Electromagnetic Field

MAO Weimin Zhao Aiminl Cui Chenglin Wang Deren Zhang Lijuan Zhong Xueyou

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Research on the Microstructure and Properties of Hypereutectic Al-24Si Alloy Stirred by Electromagnetic Field
Issue S1, Pages: 228-230(2001)
Published：2001
DOI：
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[1]毛卫民,赵爱民,崔成林,王德仁,张丽娟,钟雪友,李树索.半固态Al-24Si合金的组织和性能研究[J].特种铸造及有色合金,2001(S1):228-230. DOI：

MAO Weimin Zhao Aiminl Cui Chenglin Wang Deren Zhang Lijuan Zhong Xueyou. Research on the Microstructure and Properties of Hypereutectic Al-24Si Alloy Stirred by Electromagnetic Field[J]. Special Casting & Nonferrous Alloys, 2001, (S1): 228-230. DOI：

摘要

在常规凝固条件下

Al-24Si过共晶合金中的初生Si为粗大的板片状。经过激烈的电磁搅拌

初生Si得到明显细化

分布均匀

绝大部分初生Si呈球团状或块状;电磁搅拌还使凝固组织中出现大量的近球状先共晶α-Al。与金属型铸造的Al-24Si过共晶合金的力学性能和耐磨性能相比较

电磁搅拌和触变成形的Al-24Si过共晶合金的力学性能和耐磨性能都有大幅度的提高。

Abstract

The primary silicon phases of hypereutectic Al-24Si alloy will be solidified into large plate on traditional condition. The primary silicon phases

however

are fined greatly and distributed homogeneously

and most of them are in nodular or polygonal shape when the alloy melt solidifying is stirred violently by electromagnetic field. A large number of sphere-like α-Al phases have also been found in the microstructure because of violent electromagnetic stirring effect. The tensile strength and elongation

and wear resistance of the thixformed semi-soli hypereutectic Al-24Si alloy have been promoted greatly by comparison with that of the traditional permanent casting of hypereutectic Al-24Si alloy.