Thin strip steel continuous casting and rolling unit and strip steel rolling process method thereof

By using a twin-stand continuous rolling mill and a two-pass rolling process, the limitations of single-stand rolling have been overcome, enabling efficient production of thin strip casting and rolling technology and stable manufacturing of high-end steel grades. This has improved product quality and production efficiency while reducing costs.

CN121607408APending Publication Date: 2026-03-06CERI TECH +1
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Patent Information

Application Number
CN202511549222.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-28
Publication Date
2026-03-06

AI Technical Summary

Technical Problem

Existing thin strip casting and rolling technology is limited by single-stand rolling, making it difficult to break through the lower limit of product thickness, resulting in insufficient grain refinement, increased elastic deformation of rolls, poor surface quality of strip steel, and inability to achieve multi-stage dynamic recrystallization and stable production of high-end steel grades.

Method used

The mill adopts a two-stand continuous rolling mill, and through a two-pass rolling process, the reduction amount is reasonably allocated. Dynamic recrystallization is used to refine the austenite grains and homogenize the microstructure. An online work roll changing device is configured to achieve online roll changing without stopping the machine, thereby enhancing production stability.

Benefits of technology

It has improved strip quality and production efficiency, expanded the range of product specifications, reduced production costs, supported the development of high-end steel grades such as ultra-high strength steel and silicon steel, reduced roll wear and strip surface defects, and improved production continuity and equipment utilization.

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Abstract

The invention discloses a thin strip steel continuous casting and rolling unit and a strip steel rolling process method thereof, and the thin strip steel continuous casting and rolling unit comprises a steel ladle, a tundish, a transition ladle, a casting roller, a first pinch roller, a first rolling mill, a second rolling mill, a plate shape instrument, a cooling device, a second pinch roller, a flying shear, a turning roller and a coiling machine which are sequentially arranged in the rolling direction. A hot box and a loop are arranged between the first rolling mill and the second rolling mill. The thin-strip continuous casting and rolling unit further comprises a controller electrically connected with the strip shape instrument and a thermodetector electrically connected with the controller, and the thermodetector is used for obtaining the temperature of the strip steel at the preset position. The continuous rolling unit capacity of a thin-strip continuous casting and rolling production line can be brought into full play, guarantee is provided for improving the steel product quality, improving the production efficiency, lowering the operation cost and the like, and conditions are provided for development of high-end steel types (such as ultrahigh-strength steel and silicon steel).
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