悬浮熔炼下电源参数和冷坩埚结构对铝钪合金熔体的影响  

Effect of Power Supply Parameters and Cold Crucible Structure on Al-Sc Alloy Melt under Levitation Smelting

作　　者：李泽宇 刘国怀[1] 王晔[2] 王昭东[1] LI Zeyu;LIU Guohuai;WANG Ye;WANG Zhaodong(State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,China;School of Material Science and Chemical Engineering,Harbin University of Science and Technology,Harbin 150001,China)

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110819 [2]哈尔滨理工大学材料科学与化学工程学院,黑龙江哈尔滨150001

出　　处：《热加工工艺》2024年第1期115-121,125,共8页Hot Working Technology

基　　金：国家自然科学基金项目(52071065);中央高校基本科研业务费项目(N2007007)。

摘　　要：为了研究高钪含量铝钪合金悬浮熔炼过程工艺参数对熔体磁场、温度和流动的影响,实现均质组织制备,通过COMSOL Multiphysics软件对悬浮熔炼过程进行了模拟,研究了不同电源参数和冷坩埚结构对熔体熔炼的影响。结果表明:磁感线透过开缝进入坩埚内部,坩埚底部磁场强度远大于坩埚中部的。增大电流强度和增多坩埚分瓣数都会使坩埚内部的磁场变强,而增加电流频率则会使内部磁场变弱,加热效率降低。增大电流会增大熔体各个位置的温度和流速,增加频率会使悬浮力增强、温度升高、流速减小,且沿逆时针搅拌的流速减小的幅度更大。根据模拟结果获得的熔炼工艺方案为:采用24分瓣坩埚,电流400 A,频率10 kHz,在此工艺下制备出成分均匀的Al-23%Sc合金。In order to study the effect of process parameters on the magnetic field,temperature and flow of the melt in the suspension smelting process of high scandium content Al-scandium alloy,and realize the preparation of homogeneous structure,the suspension smelting process was simulated by COMSOL Multiphysics software,and the effects of different power supply parameters and cold crucible structure on melt melting were studied.The results show that the magnetic induction lines enter the interior of the crucible through slits,and the magnetic field intensity at the bottom is much larger than that in the middle of the crucible.Increasing the current intensity and the number of crucible slits will strengthen the magnetic field inside the crucible,while increasing the current frequency will weaken the internal magnetic field and reduce the heating efficiency.Increasing the current will increase the flow rate and temperature at all position of the melt,increasing the frequency will increase the levitation force and temperature,decrease the flow rate,and the flow rate of the counterclockwise stirring will decrease more.The melting process scheme obtained according to the simulation results is using 24 split crucible,current of 400 A and frequency of 10 kHz.Under this process,Al-23%Sc alloy with uniform composition is prepared.

关 键 词：悬浮熔炼 铝钪合金 数值模拟 工艺参数 

分 类 号：TG243[金属学及工艺—铸造] TG292