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

作者：Zhao Zhi hao^*; Xu Zhen; Wang Gao song; Zhu Qing feng; Cui Jian zhong

来源：International Journal of Minerals,Metallurgy and Materials, 2014, 21(2): 150-154.

DOI：10.1007/s12613-014-0878-9

• electromagnetic fields
• semi-continuous casting
• aluminum alloys
• as-cast structure

We have experimentally determined the as-cast structures of semi-continuous casting 7075 aluminum alloy obtained in the presence 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 meniscus, enhances the surface quality of the ingot, and changes the surface morphology of the melt pool. Moreover, low-frequency electromagnetic field was found to show the most obvious influence on improving the as-cast structure because of its high permeability in conductors.

• 出版日期2014-2
• 单位东北大学