The Core Role Of Hot Rolling Mills in Industrial Production

I. Key Processes in the forming of basic materials
Hot rolling mills achieve three core functions by continuously rolling steel billets heated to the recrystallization temperature (typically 1100-1300℃) : Cross-sectional size adjustment: They can roll 200-300mm thick slabs into finished plates of 0.8-25mm, with an efficiency 5-8 times higher than that of cold rolling. Microstructure and property optimization: The dynamic recrystallization process refines the grain size to ASTM grade 7-9, significantly enhancing the ductility of the material. Surface oxide layer control: The residual amount of iron oxide scale ≤15μm is achieved through a high-pressure descaling system.
Ii. Industrial Chain Synergy Effect
Upstream connection: Directly consume continuous casting billets, reducing energy consumption in the steelmaking - rolling process by approximately 30%
Downstream support: Provides basic raw materials for automotive steel sheets (38%), pipeline steel (21%), and construction steel (25%)
Cost advantage: The processing cost per ton of steel is reduced by 40 to 60 US dollars compared with cold rolling, and the yield rate can reach 98.5%
Iii. Directions for Technological Innovation
Modern hot rolling units have achieved: thickness control accuracy ±0.025mm (CVC+AGC system); The final rolling temperature deviation is ±15℃ (laminar flow cooling model); The production line speed has exceeded 25m/s (the latest ESP headless rolling technology).