Solidification of horizontally continuous casting of super-thin slab in stable magnetic field and alternating current  

静磁场和交流电耦合作用下超薄板坯水平连铸的凝固组织(英文)

作　　者：张小伟[1] 黄锦峰[1] 邓康[1] 任忠鸣[1] 

机构地区：[1]上海大学上海市现代冶金及材料制备重点实验室,上海200072

出　　处：《Transactions of Nonferrous Metals Society of China》2011年第1期196-201,共6页中国有色金属学报（英文版）

基　　金：Project(50674066)supported by the National Natural Science Foundation of China

摘　　要：The solidified structures of horizontally continuous casting（HCC） of super-thin slab and its relations with the current were studied under the electromagnetic vibration（EMV）.The results show that,under the action of the periodical forces from EMV,the solidified structures of the super-thin slab of pure tin is greatly refined,and the extent of grain refinement is increased with the magnitude of alternating current.For the Sn-10%Pb alloy,it is shown that the EMV promotes the growth of equiaxed grains in the center of super-thin slab,and the grains are refined with the alternating current increasing.This is useful to prevent some solidification defects in the horizontally continuous casting of super-thin slab,such as columnar grains butting,porosity,inclusions and gases gathering,and composition segregation in the centre of slab.研究在电磁振荡作用下,金属超薄板坯水平连铸的凝固组织及其与电流强度的关系。结果显示,在静磁场和交流电正交所产生的电磁振荡力的作用下,水平连铸纯Sn超薄板坯的凝固组织明显细化,且细化效果随所施电流的增大而增强;而对Sn-10%Pb合金超薄板坯,则显著地促进其等轴晶组织的形成,使其中心层面出现等轴晶区,该等轴晶层的厚度随电流强度增大而增加。实验结果表明,电磁振荡作用有利于抑制柱状晶对穿、中心疏松、夹杂和/或气体聚集、以及偏析等超薄板坯水平连铸中常见的凝固缺陷。

关 键 词：horizontally continuous casting（HCC） super-thin slab electromagnetic vibration（EMV） SOLIDIFICATION 

分 类 号：TG249.7[金属学及工艺—铸造]