Volume-averaged modeling of multiphase solidification with equiaxed crystal sedimentation in a steel ingot

作     者：Xiao-lei Zhu Shuang Cao Rui Guan Ji Yang Zhe Ning Xin-gang Ai Sheng-li Li Xin-cheng Miao 

作者机构：The key Laboratory of Material Forming and Structure Property ControlAnshan 114051LiaoningChina State Key Laboratory of Metal Material for Marine Equipment and ApplicationAnshan 114009LiaoningChina School of Materials and MetallurgyUniversity of Science and Technology LiaoningAnshan 114051LiaoningChina 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2024年第21卷第3期

页      面：229-238页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 080203[工学-机械设计及理论] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 

基　　金：supported by the National Key Research and Development Program of China(2021YFB3702005) the National Natural Science Foundation of China(52304352) the Central Government Guides Local Science and Technology Development Fund Projects(2023JH6/100100046) 2022"Chunhui Program"Collaborative Scientific Research Project(202200042) the Doctoral Start-up Foundation of Liaoning Province(2023-BS-182) the Technology Development Project of State Key Laboratory of Metal Material for Marine Equipment and Application[HGSKL-USTLN(2022)01] 

主　　题：ingot casting multiphase solidification model equiaxed crystal sedimentation microstructure macrosegregation 

摘      要：Macrosegregation is a critical factor that limits the mechanical properties of *** impact of equiaxed crystal sedimentation on macrosegregation has been extensively studied,as it plays a significant role in determining the distribution of alloying elements and impurities within a *** improve macrosegregation in steel connecting shafts,a multiphase solidification model that couples melt flow,heat transfer,microstructure evolution,and solute transport was established based on the volume-averaged Eulerian-Eulerian *** this model,the effects of liquid phase,equiaxed crystals,columnar dendrites,and columnar-to-equiaxed transition(CET)during solidification and evolution of microstructure can be considered *** sedimentation of equiaxed crystals contributes to negative macrosegregation,where regions between columnar dendrites and equiaxed crystals undergo significant A-type positive macrosegregation due to the ***,noticeable positive macrosegregation occurs in the area of final solidification in the *** improvement in macrosegregation is beneficial for enhancing the mechanical properties of connecting *** mitigate the thermal convection of molten steel resulting from excessive superheating,reducing the superheating during casting without employing external fields or altering the design of the ingot mold is indeed an effective approach to control macrosegregation.