Casting structure of pure aluminum by electric pulse modification at different superheated temperatures

查看全文 作　　者：Jingang [1,2]Qi;Jianzhong [2]Wang;Xingjiang [1,2]Liu;Bing [1,2]Wang;Daqiang [2]Cang 机构地区：[1]Metallurgical and Ecological Engineering School, University of Science and Technology Beijing, Beijing 100083, China;[2]Department of Material and Chemical Engineering, Liaoning Institute of Technology, Jinzhou 121001, China 出　　处：《Journal of University of Science and Technology Beijing》索引2005年第12卷第6期,共4页 基　　金：This work was financially supported by the National Natural Science Foundation of China (No.50174028). 摘　　要：Electric pulse modification (EPM) is a novel technique that reduces grain size by altering the structure of a melt. It was investigated that the response of the casting structure of high pure aluminum to EPM in different superheated melts. The results indi- cate that the grain refining effect of a given pulse electric field holds an optimal temperature range, moreover, a lower or higher su- perheated temperature will both disadvantage the improvements of casting structure. It essentially lies in the cooperative action be- tween the distorted absorption of clusters and the activated capability of atoms in the aluminum melt. 关 键 词：电脉冲变型 铸造组织 纯铝 过热温度 活性