Influence of edge thermal spraying on the temperature field and thermal crown of work roll during cold rolling of aluminum alloy strip

Wang, Xiuliang; Wei-dong, Zhang; Ai, Yibo

doi:10.1007/s00170-023-11830-2

Cited by 1 publication

(1 citation statement)

References 27 publications

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“…Bohacek et al improved the cooling capacity of the gap by the nozzles [11]. Wang et al adjusted the local temperature and thermal expansion of the roll edges by applying a thermal spraying method to the edges of the hot-rolling strips [12]. All in all, due to the high-temperature conditions of hot rolling, it is challenging to achieve the precise control of roll thermal expansion at different positions.…”

Section: Introductionmentioning

confidence: 99%

Online Partition-Cooling System of Hot-Rolled Electrical Steel for Thermal Roll Profile and Its Industrial Application

Wang,

Sun,

Yang

et al. 2024

Processes

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The shape and convexity are crucial quality assessment indicators for hot-rolled electrical steel strips. Besides bending rolls, shifting rolls, and the original roll profile, the thermal roll profile also plays a significant role in controlling the shape and convexity during the hot-rolling process. However, it is always overlooked due to its dynamic uncertainty. To solve this problem, it is necessary to achieve online cooling-status control for the local thermal expansion of rolls. Based on the existing structure of a mill, a pair of special partition-cooling beams with an intelligent cooling system was designed. For high efficiency and practicality, a new online predictive model was established for the dynamic temperature field of the hot-rolling process. An equivalent treatment was applied to the boundary condition corresponding to the practical cooling water flow. In addition, by establishing the corresponding target distribution curve for the partitioned water flow cooling, online water-flow-partitioning control of the thermal roll profile was achieved. In the practical application process, a large number of onsite results exhibited that the predicted error was within 5% compared to the experimental results. The temperature difference between the upper and lower rolls was within 5 °C, and the temperature difference on both sides of the rolls was controlled within 0.7 °C. The hit rate of convexity (C40) increased by 33%. It was demonstrated that the partition-cooling processes of hot rolling are effective for the local shape and special convexity. They are able to serve as a better control method in the hot-rolling process.

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Section: Introductionmentioning

confidence: 99%