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Refining Mechanism of Solidified Structure of Alloy by Electromagnetic Refining Process

机译：电磁细化工艺细化合金凝固组织的机理

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Refining mechanism of solidified structure in which a static magnetic field and an alternating electrical current are simultaneously imposed on the local area of a metal or an alloy, has been experimentally examined using a Sn-10mass%Pb alloy. The refining period of the structure was examined by changing the imposing period of the electromagnetic vibration on the sample and it was confirmed that the refining period was the initial stage of solidification. The refining region was specified to be around the electrodes by inserting a stainless steel wire net in the sample while it was independent of the inserting position of the electrodes. Convection was induced by the electromagnetic vibration because temperature difference in the sample drastically decreased as soon as the vibration was excited in the sample. From these experimental results, the estimated mechanism in this process is that dendrite tips around the electrodes.are cut off by the electromagnetic vibration in the initial stage of the solidification and it spread to the whole area of the sample by the convection induced by the electromagnetic vibration. Furthermore, nucleation is induced by an intense electromagnetic vibration.
机译：使用Sn-10mass％Pb合金，通过实验研究了在金属或合金的局部区域上同时施加静磁场和交流电的凝固组织的细化机理。通过改变样品上的电磁振动的施加时间来检查结构的细化时间，并确认该细化时间是凝固的初始阶段。通过将不锈钢丝网插入样品中，将细化区域指定为位于电极周围，而该区域与电极的插入位置无关。对流是由电磁振动引起的，因为一旦激发了样品中的振动，样品中的温差就会急剧降低。从这些实验结果来看，在此过程中，估计的机理是在凝固初期，电极周围的枝晶尖端被电磁振动切断，并通过电磁对流传播到样品的整个区域。振动。此外，通过强烈的电磁振动诱发成核。

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