Vol.19 No.3 李文珍等：球墨铸铁微观组织形成的数值模拟 ·263· 2 Su K C,Ohnaka I.Computer Simulation of Solidification of Nodular Cast Iron.The Physical Metal- lurgy of Cast Iron.H Fredriksson,M Hillert,eds.New York:Plenum Press,1985.181 3 Edward F.A Computer-Aided Simulation of the Kinetics of Solidification of the Eutectic Ductile Cast Iron.The Physical Metallurgy of Cast Iron.H Fredriksson,M Hillert,eds.New York,Plenum Press, 1985,191 4 Stefanescu D M,Kanetkar C.Computer Modelling of the Solidification of Eutectic Alloys:the Case of Cast Iron.Computer Simulation of Microstructural Evolution.New York:TMS-AIME,1986.171 5 Heine R W.The Carbon Equivalent Fe-C-Si Diagram,and its Application to Cast Iron.AFS Cast Metals Research J,1971,7(6):49 6 Stefanescu D M,Upadhya G,Bandyopadhyay D.Heat Transfer-Solidification Kinetics Modelling of Solidification of Castings.Metall Trans,1990,21A(4):997 7 Porter D A,Easterling K E,Phase Transformation in Metals and Alloys.Van Nostrand Reinhold: Wokingham,1981.326 8 Lundback E,Svensson I L,Persson P E,Modelling of Structure Formation and Relation to Mechani- cal Properties of Nodular Cast lron,Modelling of Metal Forming Processes.Stockholm:Academic Publishers,1988.37 9 Johnson W A,Mehl R F.Reactions Kinetics in Processes of Nucleation and Growth.Trans AIME, 1939,135:416 10李文珍.铸件凝固过程微观组织及缩孔缩松形成的数值模拟研究：[学位论文】.北京：清华大学，1995 Numerical Simulation of Microstructure Formation of Spheroidal Graphite Cast Iron Li Wenzhen)Liu Baicheng?)Jin Shan-tong) 1)Metallurgy Shool,UST Beijing.Beijing 100083.China 2)Tsinghua University,Beijing 100084 ABSTRACT The nucleation and growth models of the microstructure formation of spheroidal graphite cast iron from solidification down to room temperature were estab- lished according to the existing solidification kinetics theories.Based on the solidification kinetics models,a 3D finite difference code,FTStructure,has been developed to simu- late the formation of microstructures and to predict the as-cast mechanical properties of the SG iron.The cooling curves,microstructures and Brinell hardness of SG iron speci- mens were simulated.Good agreement was obtained between the calculated results and those of experiments. KEY WORDS Numerical Simulation Microstructure Spheroidal Graphite Cast Iron李 文珍等 球墨 铸铁微观组织形成 的数值模拟 ， ， 比 ， 从 ， 刁 汕 五 ， 伟 ， ， ， ， 肠 阁 一 ， 卜 汀 山 一 一 口 ， 掩 娥 ， ， ， ， 园 ， ， ， 巧 ， ， ， ， ， 刀 ， ， ， 儿 ， ， 李文珍 铸件凝固过程微观组织及 缩孔缩松形成 的数值模拟研究 学位论 文 北京 清华大学 ， 们 ‘ 琳 石 ， ， ， 肋 一 ， 卜 ， ， ， 一