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首页> 外文会议>7th International Conference on Electromagnetic Processing of Materials >Influence of the slowly rotating transverse magnetic field on the solidification of metallic alloys
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Influence of the slowly rotating transverse magnetic field on the solidification of metallic alloys

机译：缓慢旋转的横向磁场对金属合金凝固的影响

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In this work binary alloy of Pb-Sn is directionally solidified under transverse,slowly rotating magnetic field.For some alloys during directional solidification in the transverse magnetic field significant macrosegregation along the diameter of the ingot may appear if the growth velocity and magnetic field strength are chosen appropriately.This occurs as a result of thermoelectric current,driven by the applied temperature gradient at the solidification interface,and magnetic field interaction caused liquid phase forced convection(thermoelectromagnetic convection).Magnetic field rotation velocity in chosen to be slow enough that induced electric current can be neglected but still fast enough not letting thermoelectromagnetic convection fully develop in the scale of crucible.In this case the effect caused by thermoelectromagnetic convection on the structure is expected to be different from the case with static magnetic field,which is already studied in many works.Newest experimental results as well as theoretical description and interpretation of the obtained results of direction solidification experiments under rotating magnetic field will be presented in this paper.Magnetic field of 0.5 T is created by rotating permanent magnet system driven by electric step motor.
机译：在这项工作中，Pb-Sn的二元合金在横向，缓慢旋转的磁场下定向凝固。对于某些合金，在横向磁场中定向凝固期间，如果生长速度和磁场强度为0，则可能沿铸锭直径出现明显的宏观偏析。发生这种情况的原因是热电流，在凝固界面处施加的温度梯度所驱动，磁场相互作用导致液相强制对流（热电磁对流）。选择的磁场旋转速度应足够慢以至于感应出电电流可以忽略不计，但仍足够快，不能使热电磁对流在坩埚范围内充分发展。在这种情况下，热电磁对流对结构的影响有望与静磁场的情况有所不同，对此已有研究。许多作品。最新的实验结果本文将对旋转磁场下定向凝固实验的结果进行理论描述和解释。步进电机驱动永磁旋转系统产生0.5 T的磁场。

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