以Ueshima的正六边形横断面枝晶模型为原型,采用有限差分方法建立了钢凝固过程伴随δ/γ相变的两相区溶质微观偏析模型,确立了在冷却速率为10℃/s非平衡凝固条件下钢的脆性温度区间,研究分析了各溶质元素在该温度区内的偏析特点及对脆性温度区间△θ与热应变的影响规律,定量计算了不同P,S含量下脆性温度区热应变随C含量的变化规律,揭示了P,S含量的增加使连铸坯出现表面纵裂纹几率提高的机理.
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