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采用Anycasting软件建立3.1 t钢锭凝固过程的数学模型,对超低S钢锭凝固过程中冷却条件与元素浓度对S元素宏观偏析的影响进行了模拟。研究结果表明:初始S浓度为0.002%时,模外冷却强度从10 W·m~(-2)K~(-1)增加到500 W·m~(-2)K~(-1)时,偏析度降低了8%,在1 000 W·m~(-2)K~(-1)以后偏析度变化较小。综合考虑,施加模外冷却强度为500 W·m~(-2)K~(-1),可以有效地减轻偏析。最高浓度区域随着冷却强度的增加而减小。
Anycasting software was used to establish the mathematical model of 3.1 t ingot solidification process. The influence of cooling conditions and element concentration on the macro segregation of S element in the solidification process of ultra-low S ingot was simulated. The results show that when the initial S concentration is 0.002%, the cooling intensity of the mold increases from 10 W · m -2 K -1 to 500 W · m -2 K -1 , The degree of segregation decreased by 8%. After 1000 W · m -2 K -1, the degree of segregation changed little. Taken together, the application of the cooling strength of 500 W · m ~ (-2) K ~ (-1) can effectively reduce segregation. The area with the highest concentration decreases as the cooling intensity increases.