【作者】 王金龙； 王福明； 李长荣； 张炯明；

【Author】 Wang Jinlong~(1,2),Wang Fuming~(1*),Li Changrong~3,Zhang Jiongming~1(1.School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing,Beijing 100083,China;2.School of Food Science and Engineering In- ner Mongolia Agricultural University,Huhehaote 010018,China;3.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China)

【机构】 北京科技大学冶金与生态工程学院； 内蒙古农业大学食品科学与工程学院； 北京科技大学材料科学与工程学院；

【摘要】 应用了一个溶质场、流场、温度场三场耦合的模型,将糊状区作为多孔介质,并考虑重力的影响,模拟了凝固过程易切削钢9SMn28硫的宏观偏析。模拟结果显示,S浓度的变化随凝固的进行而变化,与实际铸件中S浓度的变化过程一致,最大偏析比为4.96。铸件中部为正偏析,顶部及底部呈负偏析,下部偏析程度高于上部。更多还原

【Abstract】 S macrosegregation of free-cutting steel 9SMn28 was simulated during solidification by the model of coupling solute field,flow field and temperature field,the mushy zone as a porous medium and considering effects of gravity,and the simulation results show the change of S concentration is consistent with that of the practical castings,Maximum S segregation ratio is 4.96.The middle part of the casting is positive segregation,the top and bottom parts are negative segregation,S macrosegregation of the under part of the casting is higher than the top part because of effects of gravity.更多还原