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发表时间：2022-10-06

发表刊物：中国有色金属学报

所属单位：资产与实验室管理处

期号：4

页面范围：1041-1049

ISSN号：1004-0609

摘要：A new three-dimensional finite element model describing the electromagnetic field distribution in the new-type multi-functional electromagnetic stirrer with different magnetic fields was developed. The influences of the exciting current, stirring frequency and space position of the stirrer on the magnetic induction intensity and electromagnetic force were analyzed. The results show that the simulated magnetic field in the mold is in good agreement with the measured data in the real stirrer. The magnetic induction intensity increases linearly with increasing the exciting current, and decreases with increasing the current frequency. On the same height of mold, the magnetic induction intensity gradually increases from the center to the wall of mold and reaches its maximum in the middle position of the stirrer and becomes smaller towards the end of the mold. The electromagnetic force increases with the increase of the exciting current and the stirring frequency. And the electromagnetic force reaches the maximum value in the bottom and gradually attenuates from the bottom to the top along the axial direction. And along the radial direction, the electromagnetic force slightly decreases toward the center of the ingot. The calculation results under different magnetic fields show that, the spiral magnetic field has stronger magnetic induction intensity and electromagnetic force at the same stirring parameters, which causes intensive flow in a larger zone of the molten metal along the radial and axial direction, thus promotes the formation of ellipsoidal or equiaxed grains and reduces the macrosegregation.

备注：新增回溯数据