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        Solidification Structure and Segregation of High Magnetic Induction Grain-Oriented Silicon Steel

        Xin Li,Min Wang,YanPing Bao,Jian Gong,Xianhui Wang,Pang Weiguang 대한금속·재료학회 2019 METALS AND MATERIALS International Vol.25 No.6

        The solidification structure and centerline segregation of high magnetic induction grain-oriented silicon steel slabs werestudied to describe the characteristics of solidification and compare the degree of centerline segregation of continuouslycast slabs. Industrial experiments were conducted to investigate the solidification behavior of slabs by secondary coolingsegment electromagnetic stirring. Three typical slabs were produced by S-EMS with current intensities of 0, 200, and 350 A. Molten steel cast at a low stirring intensity (0 A) resulted in a coarse structure relative to those cast at higher stirring intensities(200 and 350 A). The centerline segregation of carbon and silicon markedly increased with increases in S-EMS currentintensity. Composition distribution by electron probe microanalysis identified segregation spots as the sources of centerlinesegregation. Experimental results indicate that to optimize the centerline segregation of grain-oriented silicon steel slabs,the columnar crystal zone should be enlarged and the equiaxed crystal zone be reduced.

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