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首页> 外文期刊>Journal of Materials Engineering and Performance >Structure characteristics in industrially centrifugally cast 25Cr20Ni stainless steel tubes solidified under different electromagnetic field intensity
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Structure characteristics in industrially centrifugally cast 25Cr20Ni stainless steel tubes solidified under different electromagnetic field intensity

机译：在不同电磁场强度下凝固的工业离心铸造25Cr20Ni不锈钢管的结构特征

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摘要

The influences of different electromagnetic field intensities on the solidification structures of industrially centrifugally cast 25Cr20Ni stainless steel tubes have been investigated in detail. The results reveal that the electromagnetic field exerted during the centrifugal solidification causes a marked variation in the structures of the cast tubes. With an increase of the electromagnetic field intensity, the area fraction of the equiaxed structures in transverse sections of the cast tubes increases, and the macrostructures are gradually refined. The distribution of the eutectic carbides changes from the dendrite boundaries to the grain boundaries. However; an excessive electromagnetic field intensity gives rise to many intergranular cast defects formed along the inner walls of the centrifugally cast tubes. The effects of fluid flow induced by the electromagnetic field on the solidification process of the centrifugally cast tubes are the primary reason for the previously mentioned structure variations.
机译：详细研究了不同电磁场强度对工业离心铸造的25Cr20Ni不锈钢管凝固组织的影响。结果表明，离心凝固过程中施加的电磁场导致铸管结构发生明显变化。随着电磁场强度的增加，铸管横截面上的等轴结构的面积分数增加，宏观组织逐渐细化。共晶碳化物的分布从枝晶边界到晶界变化。然而;过大的电磁场强度会导致沿离心铸造管的内壁形成许多晶间铸造缺陷。由电磁场引起的流体流对离心铸造管的凝固过程的影响是上述结构变化的主要原因。

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