About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Processing Fundamentals: Towards Sustainable Process Modeling, Design, and Operation
|
| Presentation Title |
Numerical Modeling of Solidification Structure and Macrosegregation in Large Bloom Continuous Casting With MEMS and FEMS: A Three-Phase Volume Average Approach |
| Author(s) |
Haijie Zhang, Lifeng Zhang |
| On-Site Speaker (Planned) |
Haijie Zhang |
| Abstract Scope |
Mold electromagnetic stirring (M-EMS) and final electromagnetic stirring (F-EMS) are widely used in continuous casting of large steel blooms to enhance central equiaxed zone formation and reduce macrosegregation. This study develops a three-phase volume-averaged solidification model—incorporating columnar dendrites, equiaxed grains, and liquid—to simulate casting of a 510 mm × 390 mm bloom, accounting for dendrite fragmentation, remelting, and electromagnetic effects. Simulations match experimental results in macrostructure and segregation. M-EMS accelerates superheat dissipation, creates undercooled zones, and promotes dendrite fragmentation via swirling flow. Most fragments settle and grow into equiaxed crystals. F-EMS improves solute homogenization and reduces centerline segregation. Electromagnetic stirring influences energy, solute, and grain transport, shaping the final structure. Negative segregation forms in the equiaxed center, positive segregation at the columnar–equiaxed transition, and subsurface negative segregation due to solute redistribution. The study offers insights for optimizing bloom casting. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Solidification, Process Technology |