摘要
To improve the power efficiency and optimize the configuration of cold crucible using for continuous melting and directional solidification （DS）, based on experimental verification, 3D finite element （FE） models with various configuration-elements were developed to investigate the magnetic field in cold crucible. Magnetic flux density （B） was measured and calculated under different configuration parameters. These parameters include the inner diameter （D2）, the slit width （d）, the thickness of crucible wall, the section shape of the slit and the shield ring. The results show that the magnetic flux density in z direction （Bz） both at the slit and at the midpoint of segment will increase with the decrease of D2 or with the increase of the width of the slit and the section area of wedge slit or removing the shield ring. In addition, there is a worst wall thickness that can induce the minimum Bz for a cold crucible with a certain outer diameter.
为了提高连续熔铸与定向凝固用冷坩埚的工作效率和优化结构设计,基于实验验证,建立了不同结构的电磁冷坩埚的3D有限元模型,并研究了坩埚结构对其内部磁场的影响规律。电磁冷坩埚的结构变量包括坩埚内径、坩埚壁厚、开缝形状以及水冷铜环。结果表明:随着坩埚内径的减小、开缝宽度和横截面积的增大以及水冷铜环的去除,坩埚内分瓣中点和开缝处的磁场随之增强。此外,当外径一定时,存在一个最差的坩埚壁厚使得坩埚内磁场值最低。
基金
Project (2011CB605504) supported by the National Basic Research Program of China
