本文提出了预测核反应堆压力容器钢中杂质元素(主要是磷)晶间非平衡偏析的溶质拖拽模型，并且与速率理论模型进行了对比。
In this paper, a solute drag model was proposed to predict the phosphorus inter granular segregation in reactor pressure vessel steels and compared with the rate theory model.
分析认为，其主要原因是铸造时的不平衡结晶所产生的锰偏析、镁偏析，没有得到有效的消除。
The result shows that the cause is due to the failure of effective elimination of manganese segregation and magnesium segregation resulted from non-equilibrium crystallization in casting step.
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