Methods and applications for preventing steel parts from warping during rolling

By controlling the gas flow rate and burner parameters of the heating furnace, combined with the flat square nozzle cooling device and roll speed control, the problem of head lifting during the steel rolling process was solved, improving the yield and equipment life.

CN117862253BActive Publication Date: 2026-06-30SGIS SONGSHAN CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SGIS SONGSHAN CO LTD
Filing Date
2023-12-20
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

During the rolling process of steel parts, especially during the rolling of No. 3 flat roll, the phenomenon of head lifting occurs frequently, which affects the quality of steel parts and the efficiency of the rolling mill. Existing correction methods are time-consuming and have little effect.

Method used

By controlling the heating process of the heating furnace, adjusting the gas flow rate and burner parameters in the soaking zone, the upper and lower surfaces of the steel parts are ensured to be heated evenly. During the rolling process, a flat square nozzle cooling device and control of the No. 3 flat roll speed are used to compensate for the resistance when the steel parts bite in, thus preventing them from warping.

Benefits of technology

It effectively prevents steel parts from warping during rolling, improves yield, reduces iron oxide scale formation, lowers production costs, and extends the life of rolling mill equipment.

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Abstract

This invention provides a method and its application for preventing steel parts from curling up during rolling, relating to the field of iron and steel smelting technology. It includes heating the steel parts before feeding them into a rolling mill for rolling. Heating involves injecting gas from the upper and lower burners of a heating furnace. The number of upper burners in the soaking section of the heating furnace is the same as the number of lower burners, and they correspond one-to-one. The gas flow rate from the upper burner at the beginning of the soaking section is 1.1 to 1.8 times that of the corresponding lower burner, and the gas flow rate from the upper burner at the end of the soaking section is 0.8 to 1.5 times that of the corresponding lower burner. By controlling the heating process of the heating furnace during rolling and controlling the gas flow rate in the soaking section, the steel parts are ensured to be heated evenly, while reducing excess gas damage and burn-off costs caused by heating, improving yield, reducing the formation of iron oxide scale on the surface of the steel parts, and making it easier to control the temperature of the steel parts, thereby reducing the occurrence of curling up after the steel parts bite into the mill.
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