To improve the surface quality of low‐carbon steel slabs under high casting speed conditions, this study systematically investigated the effects of casting speed and electromagnetic braking (EMBr) on the formation of hooks and the characteristics of inclusions through a combination of numerical simulations and industrial experiments. The results indicated that as the casting speed increases from 1.4 to 1.8 m/min, the temperature of the meniscus region rises, the solidification of the hook is inhibited, and the hook depth decreases significantly. Meanwhile, the high casting speed intensifies the scouring effect at the solidification front, leading to a significant reduction in the number density of inclusions near the surface. When EMBr is applied under high casting speed conditions, the Lorentz force lifts the main flow upward, enhancing heat supply to the meniscus region and further decreasing the hook depth. However, the upward deflection of the flow jet causes more inclusions to enter the upper recirculation zone, resulting in a slight increase in the overall number density of inclusions, while the number density of large‐sized inclusions continues to decrease. Overall, the synergistic effect of high casting speed and EMBr effectively reduces the hook depth and decreases the probability of large‐sized inclusion entrapment.
Wang et al. (2026) studied this question.