Finishing rolling unit in ESP endless rolling and rolling method

Abstract

The invention discloses a finishing rolling unit in ESP endless rolling and a rolling method, and belongs to the field of steel and iron material engineering. The finishing rolling unit in the ESP endless rolling of the invention comprises a plurality of finishing mills arranged in the order of a finishing rolling process, and is characterized in that one of the finishing mills is a standby finishing mill for replacing the worn finishing mill; a spray header is arranged in front of the preceding finishing mill in the standby finishing mill and the worn finishing mill by the order; and the spray header spray cold water to cool a strip plate to complete the transformation process of austenite to ferrite. According to the invention, the full-continuous non-stop flexible rolling technology canbe realized, the productivity drop caused by the forced stop of the production line due to the downtime and roll change of the finishing rolling unit is avoided, and the output is also improved; andthe roll temperature rise can be reduced, so that the fatigue cracking and fracturing of the roll due to the thermal stress are reduced, the wear of the roll is reduced, the surface quality of endlessrolled products is improved, and the production cost is significantly lowered.

Description

technical field [0001] The invention belongs to the field of iron and steel material engineering, and relates to a ferrite rolling method, in particular to a finishing rolling unit in ESP endless rolling, and a ferrite rolling method based on ESP dynamic variable regulation. Background technique [0002] The iron and steel industry is an important industry of the country, among which metal plates and strips play a very important role in the national economy and national defense modernization. Thin Strip Continuous Casting and Rolling (TSCR) means that the molten steel is cast into a strip by a continuous casting machine, and is directly heated by a heater without being cooled to room temperature. Instead of the phase transformation of ferrite → ferrite → austenite, it always keeps rolling in the austenite area. It concentrates the most advanced smelting, continuous casting and continuous rolling technologies in the contemporary era, and is known as the successor to oxygen fu...

AI Technical Summary

Problems solved by technology

The above-mentioned technology realizes the cooling and cooling of the strip by adding cooling pipes in the F4-F5 stands of the finishing rolling group and adding a cooling channel in front of the finishing rolling group, and then performs ferrite rolling, but the finishing rolling groups are all 5 The rack finishing unit does not have the function and strategy of online roll change with dynamic schedule change. When the rolls of the finishing unit are worn and replaced, the roll replacement needs to be stopped. During the roll change process of the finishing unit, the upstream continuous casting cannot be carried out. , which limits the play of ESP endless rolling technology and cannot fully release the production capacity. Moreover, in the process of conventional austenitic rolling, it is impossible to freely switch ferrite rolling according to the change of regulations. Therefore, there is an urgent need for an ESP endless rolling The finishing rolling unit and rolling method in the process realize continuous non-stop production, and can realize customized production according to needs

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