Coiling method for producing ultra-thin strip steel from ferrite on basis of hot continuous rolling mill

Abstract

The invention relates to a coiling method for producing ultra-thin strip steel from ferrite on the basis of a hot continuous rolling mill. The method comprises the following steps that a close-range coiling machine is added in a preset position, away from the outlet end of a finishing mill group, of a heat output roller way, after the ultra-thin strip steel is subjected to hot rolling in the ferrite area of the finishing mill group, the strip steel is conveyed to the close-range coiling machine for coiling through the heat output roller way, at the moment, the temperature of the ultra-thin strip steel just reaches the coiling target temperature, and the coiling target temperature is 0-80 DEG C higher than the ferrite annealing recrystallization temperature. According to the method, coiling of the ultra-thin strip steel rolled in the ferrite area can be carried out on the traditional rolling mill on which products with multiple thicknesses share the same production line, and the problem that the coiling temperature is difficult to reach the coiling target temperature due to long-time air cooling of the rolled strip steel on the heat output roller way in the prior art is solved.

Description

technical field [0001] The invention relates to a coiling method for producing ultra-thin strip steel based on ferrite of a hot continuous rolling mill, and belongs to the technical field of steel rolling. Background technique [0002] The ferritic rolling process (also known as warm rolling, Warm Rolling) was gradually developed in the 1980s, and is used to produce hot-rolled sheets with excellent microstructure and excellent performance that can be used directly or used as raw materials for cold rolling production. Compared with the traditional hot-rolling process in the austenite zone, the advantages of the hot-rolled strip steel production method in the ferrite zone are: 1) It can be heated at low temperature, reducing heating energy consumption and reducing high-temperature oxidation burning loss; 2) Deformation during rolling The resistance is small, which can effectively reduce the energy consumption of the rolling process; 3) to shorten the process flow and reduce th...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a coiling method for rolling ultra-thin strip steel in the ferrite zone on a traditional rolling mill that shares the same production line for multi-thickness products. The coiling temperature is difficult to reach the coiling target temperature caused by long-term air cooling of the strip steel on the heat output roller table after production

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