CAJ | 학술논문

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.
위료제고련속용주여정향응고용랭감과적공작효솔화우화결구설계,기우실험험증,건립료불동결구적전자랭감과적3D유한원모형,병연구료감과결구대기내부자장적영향규률.전자랭감과적결구변량포괄감과내경、감과벽후、개봉형상이급수랭동배.결과표명:수착감과내경적감소、개봉관도화횡절면적적증대이급수랭동배적거제,감과내분판중점화개봉처적자장수지증강.차외,당외경일정시,존재일개최차적감과벽후사득감과내자장치최저.
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 ofD2 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.