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首页> 外文期刊>ISIJ international >Morphology and Segregation in Continuously Cast High Carbon Steel Billets
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Morphology and Segregation in Continuously Cast High Carbon Steel Billets

机译：连铸高碳钢坯的形貌和偏析

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摘要

Morphology and centerline macrosegregation in continuously cast high carbon steel billet samples were investigated in order to establish the casting behavior of a six strand curved mold billet caster without electro-magnetic stirring. Several billet samples were collected from the continuous casting shop of Tata Steel, India and experimental observations were correlated with the operating parameters of the caster. Macrostructural examination revealed predominantly columnar structure associated with high degree of segregation and porosities in all billets cast above 21℃ of tundish superheat. Centerline porosity was practically absent in the billet cast below 21℃. These billets showed prominent V-segregation and less prominent centerline segregation. Transition from U-segregation to V-segregation was observed around 21℃ superheat. An attempt has been made to study the effectiveness of secondary cooling by measurements of the secondary dendrite arm spacing at various locations in billet samples. Finally, degree of segregation of constituent solute elements were correlated among themselves and applicability of one of the simple segregation models to the centerline macrosegregation has been tested.
机译：研究了连续铸造的高碳钢坯铸坯样品的形貌和中心线宏观偏析，以建立不带电磁搅拌的六股弯模坯铸机的铸造性能。从印度塔塔钢铁公司的连铸车间中收集了一些钢坯样品，并将实验观察结果与连铸机的运行参数相关联。宏观结构检查发现，在中间包过热度高于21℃的所有铸坯中，柱状结构主要与高度偏析和孔隙有关。在21℃以下的坯料中几乎没有中心线孔隙。这些钢坯显示出显着的V形偏析和不明显的中心线偏析。在21℃左右的过热状态下，从U偏析向V偏析转变。尝试通过测量坯料样品中各个位置的二次枝晶臂间距来研究二次冷却的有效性。最后，组成溶质元素的偏析程度之间相互关联，并且测试了一种简单偏析模型对中心线宏观偏析的适用性。

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