Effects of low-frequency electromagnetic field on microstructures and macro segregation of continuous casting 7075 aluminum alloy

被引：106
作者：
Zhang, BJ [1 ]
Cui, JZ [1 ]
Lu, GM [1 ]
机构：
[1] Northeastern Univ, Minist Educ, Key Lab Electromagnet Proc Mat, Shenyang 110004, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2003年 / 355卷 / 1-2期
基金：
中国国家自然科学基金;
关键词：
continuous casting; electromagnetic field; frequency; microstructure; macrosegregation;
D O I：
10.1016/S0921-5093(03)00105-9
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The influences of low-frequency electromagnetic field on microstructures and macrosegregation in continuous casting process were investigated experimentally. Ingot of 7075 aluminum alloy with a diameter of 200 mm was produced and as-cast structures were examined. In the presence of an electromagnetic field, a substantial reduction of grain size and the macrosegregation of alloying elements was achieved. Further, a pronounced evolution of microstructures and segregation with the frequency of electromagnetic field is presented. The results show that frequency plays a significant role in grain refinement and macrosegregation inhibition. A fine equiaxed as-cast structure is obtained when frequency reaches 15 Hz, while a proper frequency (30 Hz in this study) can inhibit the macrosegregation to the best effect. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：325 / 330
页数：6
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