研究了电磁搅拌对Fe—C合金宏观偏析的影响。结果表明,在强烈搅拌下,大块石墨富集试样外表面,在试样的纵向和径向存在明显的宏观偏析。界面前附加环流的存在是径向偏析产生的原因。此外,生长速度对宏观偏析也产生影响。
Enrichment of massive graphite on lateral surface and evident macro--segrega-tion along both longitudinal and axial directions were found by the influence of intense electromagnetic stirring during unidirectionally solidifying grey cast iron ingot. A secondaryflow within the region near solid--liquid interface seems to be the cause of axial segregation, and the solidification rate may also be influential to the macro--segregation.
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