Effect of feeding parameters on ingot segregation and shrinkage pore in vacuum arc remelting
作者机构:School of Metallurgy and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China Chengdu Advanced Metal Materials Industrial Technology InstituteChengdu 610303SichuanChina School of Mechanical and Materials EngineeringNorth China University of TechnologyBeijing 100144China
出 版 物:《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)
年 卷 期:2023年第30卷第6期
页 面:1268-1278页
核心收录:
学科分类:08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程(可授工学、理学学位)]
基 金:the support from Science and Technology Program of Hebei(Nos.20311004D and 20591001D) National Natural Science Foundation of China(No.51904024)
主 题:Vacuum arc remelting Feeding parameter Macrosegregation Shrinkage pore Solidification
摘 要:The feeding parameters in the final stage of vacuum arc remelting process obviously affect the solute segregation and shrinkage pore *** with the electromagnetic field,fluid flow,and solute transport,a numerical model was built to investigate the effect of feeding parameters on the ingot solidification *** Nb segregation and shrinkage pore depth in the solidified ingot were *** results show that the liquid moves along the solidification front and the vertex flow is formed in the liquid pool,which promotes solute *** the solidified ingot,the Nb segregation in the lower part is negative,while that in the upper part is *** the differential electrode applied,the positive segregation is slightly reduced but the segregation distribution remains *** the feeding current decreases,the positive segregation zone moves toward the ingot top surface,due to the final solidification position moving *** the feeding time extended,the positive segregation moves to the top surface and the shrinkage pore depth is *** the feeding time is set at 12 min,the shrinkage pore depth can be reduced to 21 mm.