Design and optimization of 13t flat ingot geometry by solidification numerical simulation
LAN Peng1,2，LI Peng-shan1,2，LIU Chun-xiu1,2，ZHANG Jia-quan1,2，ZHANG Rui-tian3
（1. State Key laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China 2. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 3. Anshan Iron and Steel Group Co., Attached Intergrated Company, Anshan 114051, Liaoning, China）
Abstract：A three dimensional finite element model to simulate solidification of large steel ingot with heat, flow and solute transfer coupled calculation was developed. The results such as solid fraction, shrinkage pipes and segregation were verified by experimental and numerical studies. The distribution of porosity and segregation in a 13.1t flat ingot was predicted and the relationship between flakiness ratio and slenderness ratio, and ingot internal defects such as soundness and homogeneity were also revealed. More obvious improvement of porosity and segregation in Q235 steel ingot than that in 70CrMn ingot was observed. It is inferred that the commonly used mould should be designed and optimized under high alloyed steels solidification condition. The accompanied appearance of porosity and segregation should be carefully considered in the numerical model predicting these solidification defects.
2014, Vol. 24 
