The Technology Of The Hot Rolling Machine

The technology of hot rolling machines possesses efficient forming capabilities. Operating at high temperatures (typically 900-1300°C), these machines keep the steel in a highly plastic state, allowing for rapid forming through large reduction ratios. For instance, the roughing mill can reduce a 250mm thick billet to 45mm, significantly enhancing processing efficiency.
The technology of hot rolling machines offers energy-saving and cost advantages. The energy consumption of hot rolling processes is lower than that of cold rolling. The material utilization rate is 85%-88%, and the production rhythm is fast, making it suitable for large-scale continuous production, thereby reducing unit energy consumption costs. Some hot rolling machines can have an annual production capacity of several million tons, further reducing production costs.
Hot rolling machines are highly adaptable. They can process various specifications of steel, ranging from thick plates for construction to thin strips for automobiles (with a thickness of 1.6mm or more), covering a width range of 2200mm, meeting the needs of different industries. The longitudinal and transverse properties of hot-rolled steel are significantly different, facilitating subsequent directional processing.
The integration level of hot rolling machine equipment is high. Modern hot rolling machines are equipped with high-power drive systems (single motor 20 megawatts) and powerful rolls (rated rolling force 5500 tons), supporting high-intensity continuous operation. The finishing mill and the coiler are linked, enabling a rolling speed of several hundred meters per minute.
Hot rolling at high temperatures can refine grains, improve the internal structure of the steel, and enhance mechanical properties. Although the hardness and strength of hot-rolled coils are lower than those of cold-rolled coils, their ductility is better, making them suitable for subsequent deep processing.