Dynamic Distributions of Mold Flux and Air Gap in Slab Continuous Casting Mold

Numerical Simulation on Multiple Physical Fields Behaviors in Billet Continuous Casting with Different Stirrer Positions

“…[1][2][3] Mold electromagnetic stirring (M-EMS) has become one of the most promising technologies for improving the homogenization and cleanliness of billet products. [1][2][3] Mold electromagnetic stirring (M-EMS) has become one of the most promising technologies for improving the homogenization and cleanliness of billet products.…”

Formation Mechanism of a Wide-Face Longitudinal Off-Corner Depression During Thick Slab Continuous Casting

“…Under the steady continuous casting conditions shown in Tables IV and V, the calculated temperatures of the mold copper plates are compared with the signals recorded by the thermocouples, as shown in Figure 5. Compared with the previous work, [24] the casting speed of the present work is much higher, which leads to a higher mold temperature. In the width direction, the high points of temperatures are aligned with the bolt holes.…”

“…To describe the complex heat transfer between the solidifying shell and mold copper plates, an interface heat transfer model (IHTM) featuring the properties and distributions of mold slag layers, air gap expansion, and contact status is applied in the present work. [24] In the IHTM, there are three kinds of media in the shell-mold interface gap: liquid slag, solid slag, and air. When the shell surface temperature is higher than the solidification temperature of mold slag, the interface gap is filled with liquid slag and solid slag; otherwise, it is filled with solid slag and air.…”

“…[35] C. Thermal and Deformation Behaviors of the Solidifying Shell Below the Mold After primary cooling in the mold, the solidifying shell moves into the secondary cooling zones, where both contact cooling by rolls and spray cooling have a significant influence on the slab temperature. 305 Main composition of steel (wt pct) 0.08C-0.3Si-1.5Mn-0.013-P-0.003S Properties of mold slag and air gap Niu et al [24] Table V Meanwhile, the temperature of steel strand has a certain effect on the deformation of solidifying shell. Figure 12 shows the contact state, temperature distribution, width, and thickness direction displacements of the slab just below the mold, and Z-axis indicates the distance from meniscus.…”

Prediction Model for Degree of Solid-shell Unevenness during Initial Solidification in the Mold

“…In addition, if the solid-shell is uneven, heat transfer is disturbed by air gaps that form between the solid-shell and the mold wall; this disturbance extends the time for which the initial solid-shell is exposed to high temperature, and thereby promotes coarsening of grains on the surface of the cast steel. [2][3][4][5][6][7][8] These coarse grains cause concentration of segregation and stress at grain boundaries, so surface cracking is facilitated. [9][10][11][12] During continuous casting, peritectic steels in which the solid-shell is unevenly solidified also have relatively large mold level fluctuations, which degrade the surface quality of the cast steel.…”