Effect of Interaction Between Superheat Degree and Combined EMS on Dendritic Structure and Homogeneity of Heavy Rail Steel Bloom
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摘要: 为探究过热度及连铸组合式电磁搅拌交互作用对超大断面重载钢轨钢铸坯凝固组织及C、Mn元素宏观偏析的影响,在特定组合电搅工艺条件下,开展了不同过热度的工艺对比试验;通过数值模拟计算,定性分析了过热度对连铸坯冷却凝固及组织构成的影响;在此基础上解析过热度与电磁搅拌交互作用对铸坯凝固组织及C、Mn元素宏观偏析的实际影响。探讨性的提出提高大方坯重载钢轨钢铸坯均质性及致密性技术思路。Abstract: In order to determine the effect of interaction between superheat degree and combined EMS on dendritic structure and C,Mn homogeneity of heavy rail steel bloom,comparing experiment for different superheat degrees were carried out based on the specific combined EMS process.The effects of superheat degrees on the solidifying process and dendritic structure of bloom was qualitative analyzed by numerical simulate;the actual effects of interaction between superheat degree and combined EMS on dendritic structure and C,Mn macro segregation of bloom were further analyzed.Based on the analysis results the technical process improving the homogeneity and intensity of heavy rail steel bloom has been proposed.
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