Abstract：A coupled thermodynamic model of inclusions precipitation and solute elements microsegregation during solidification of 253MA steel was established basing on the reaction equilibrium principle of multiphase and polycomponent and the redistribution theory of solute elements in the interface of liquid and solid during solidification. Then the accuracy of this model was validated through the commercial test. Using this model, the dissolved cerium content in 253MA steel with different conditions, such as cerium addition, oxygen content and sulfur content, was calculated. Under the rated condition of the model, some results were obtained as follows. In order to keep high dissolved cerium content in 253MA steel, the cerium addition(mass fraction) must be higher than 0. 025% and ［%O］+［%S］<0. 009(［%O］<0. 0046), 2［%O］+［%S］<0. 014(［%O］>0. 0046).
李言栋，刘承军，姜茂发. 铈在253MA耐热钢中赋存状态的热力学分析[J]. , 2014, 21(3): 15-18.
LI Yan-dong，LIU Cheng-jun，JIANG Mao-fa. Thermodynamic Study on the Occurrence of Cerium in 253MA Heat-Resistant Steel. , 2014, 21(3): 15-18.
2014, Vol. 21 
