Abstract
In the present work, the bulging deformation of a wide-thick slab under uneven cooling conditions was studied using finite element method. The non-uniform solidification was first calculated using a 2D heat transfer model. The thermal material properties were derived based on a microsegregation model, and the water flux distribution was measured and applied to calculate the cooling boundary conditions. Based on the solidification results, a 3D bulging model was established. The 2D heat transfer model was verified by the measured shell thickness and the slab surface temperature, and the 3D bulging model was verified by the calculated maximum bulging deflections using formulas. The bulging deformation behavior of the wide-thick slab under uneven cooling condition was then determined, and the effect of uneven solidification, casting speed, and roll misalignment were investigated.
Highlights
Under the load of ferrostatic pressure, obvious bulging deformation of the solidified shell is observed in both the thickness and width directions
With the increase of shell thickness on the narrow side, this trend is reversed at Locations 2 and 3, which indicates that the constraining effect of the narrow side of the solidified shell affects the bulging deflection of the narrow surface more significantly than does the ferrostatic pressure
The bulging deformation of the wide-thick slab under an uneven cooling condition was simulated at three strand positions
Summary
To further improve the calculation accuracy and revealing the bulging behavior more comprehensively, finite element method began to be adopted by researchers.[17,18] A series of 2D[19,20,21,22,23] or 3D[24,25,26,27,28,29,30,31,32] finite element models were developed to quantitatively estimate the bulging deflection or strain status of the solidified shell. The bulging deformation behavior of the wide-thick slab under an uneven cooling condition was revealed, and the effects of non-uniform solidification, casting speed, and roll misalignment were investigated
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