As-cast structure of DC casting 7075 aluminum alloy obtained under dual-frequency electromagnetic field

作     者：Zhi-hao Zhao Zhen Xu Gao-song Wang Qing-feng Zhu Jian-zhong Cui 

作者机构：The Key Laboratory of the Ministry of Education of China for Electromagnetic Processing of Materials Northeastern University 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2014年第21卷第2期

页      面：150-154页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the National Natural Science Foundation of China(No.51004036) the Fundamental Research Funds for the Central Universities(No.N120309002) 

主　　题：electromagnetic fields: semi-continuous casting aluminum alloys as-cast structure 

摘      要：We have experimentally determined the as-cast structures of semi-continuous casting 7075 aluminum alloy obtained in the pres-ence of dual-frequency electromagnetic field. Results suggest that the use of dual-frequency electromagnetic field during the semi-continuous casting process of 7075 aluminum alloy ingots reduces the thickness of the surface segregation layer, increases the height of the melt menis-cus, enhances the surface quality of the ingot, and changes the surface morphology of the melt pool. Moreover, low-frequency electromag-netic field was found to show the most obvious influence on improving the as-cast structure because of its high permeability in conductors.