Combined Study on Mold Taper and Corner Radius in Bloom Continuous Casting by FEM Simulation and Trial Experiment

A plane stress model was developed to study the coupled effect of mold taper and corner radius on the thermal–mechanical behavior of a 250 mm × 280 mm continuously cast bloom for a given special steel. Good agreement was obtained in both shell thickness and the off-corner cracking location from mode...

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Bibliographic Details
Published in:Metals and materials international 2019, 25(6), , pp.1603-1615
Main Authors: Lan, Peng, Li, Liang, Tie, Zhanpeng, Tang, Haiyan, Zhang, Jiaquan
Format: Article
Language:English
Subjects:
Aluminum
Blooms (metal)
Characterization and Evaluation of Materials
Chemistry and Materials Science
Computer simulation
Continuous casting
Crack sensitivity
Engineering Thermodynamics
Heat and Mass Transfer
Hoops
Machines
Magnetic Materials
Magnetism
Manufacturing
Materials Science
Mechanical properties
Metallic Materials
Molds
Plane stress
Processes
Solid Mechanics
Solidification
Special steels
Surface cracks
Surface temperature
Tapering
재료공학
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Summary:A plane stress model was developed to study the coupled effect of mold taper and corner radius on the thermal–mechanical behavior of a 250 mm × 280 mm continuously cast bloom for a given special steel. Good agreement was obtained in both shell thickness and the off-corner cracking location from modeling and trial experiment. The results show that increasing mold taper results in the obvious decrease of surface temperature near the corner, while enlarging mold corner radius makes the shell surface temperature at the corner region more even with the mold taper between 0 and 1.5% m −1 . It is also found that both the mold corner radius and taper are the key factors influencing the shell crack sensitivity but with different mechanism. For the internal crack, the mold taper takes more dominant effect for its corner radius between 0–10 mm, as the hoop strain at the solidification front decreases with increasing mold taper. For the surface crack, more sensitivity is noticed to the mold corner radius. Increasing mold corner radius leads to the increase of the surface hoop strain in the corner region, almost regardless of mold taper. The proper mold taper and corner radius for the present bloom casting should be 1.0–1.5% m −1 and 15–25 mm respectively. Graphical Abstract
ISSN:1598-9623
2005-4149
DOI:10.1007/s12540-019-00311-5