Ferrite area endless rolling method of extremely thin strip steel

Abstract

The invention relates to a ferrite area endless rolling method of extremely thin strip steel. The ferrite area endless rolling method comprises the steps that the strip steel with the thickness being0.8-2.0 mm is rolled within the temperature range of a ferrite area by a finishing rolling unit through endless continuous casting, rough rolling and intermediate forced cooling. According to the highest speed of the finishing rolling unit and the limit thickness of the strip steel rolled in the ferrite area, the distance between a close-range coiling machine and an end rack of the finishing rolling unit is 20-48 m, the air-cooling temperature drop from a finishing rolling outlet to the coiling machine is reduced, and the coiling temperature is controlled within the range of 0-80 DEG C above the ferrite annealing and recrystallization temperature. According to the ferrite area endless rolling method of the extremely thin strip steel, the coiling temperature of the ferrite area rolled stripsteel can be controlled, high-temperature recrystallization of the coiled ferrite area rolled strip steel is achieved, and the forming performance of the hot-rolled strip steel and the cold-rolled annealed strip steel is improved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to an endless rolling method in the ferrite zone of an ultra-thin steel strip. Background technique [0002] The ferrite rolling process (also known as warm rolling, Warm Rolling) was developed by the Belgian Iron and Steel Research Center in the late 1980s. plate. Compared with the traditional hot-rolling process in the austenitic zone, the advantages of the ferritic zone hot-rolled strip production method are: [0003] 1) It can be heated at low temperature, reducing heating energy consumption and reducing high temperature oxidation burning loss; [0004] 2) The deformation resistance in the rolling process is small, which can effectively reduce the energy consumption in the rolling process; [0005] 3) To shorten the process flow and reduce roll loss; [0006] 4) During the low-temperature rolling process, the steel strip is less oxidized, and the oxide scale is thinner, w...

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Problems solved by technology

The method of induction heating after the finishing mill to increase the coiling temperature has been mentioned in the relevant patent application, but the power required for strip heating in the production process is huge, and the energy consumption problem is prominent

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