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
李泽宇 1刘国怀 1王晔 2王昭东1
作者信息
- 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
- 折叠
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.
Abstract
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Key words
levitation melting/Al-Sc alloy/numerical simulation/process parameters引用本文复制引用
基金项目
国家自然科学基金(52071065)
中央高校基本科研业务费专项(N2007007)
出版年
2024
NETL
NSTL
万方数据