A kind of manufacturing method of thin gauge hot-rolled strip steel

Abstract

A method for manufacturing thin-gauge hot-rolled strips, which is characterized by a single-machine single-stream thin slab continuous casting machine directly connected to the rolling mill, steelmaking → continuous casting → swing shear → steel pushing → descaling → edge heating →Roughing mill unit→Flying shear→Coreless coiling→Induction heating→Descaling→Finishing rolling unit→Strip cooling→Shearing→Coiling→Unloading→Baling→Transporting→Weighing, labeling→Transportation→ Storage. Endless rolling process or single billet rolling process is adopted. The slab temperature at the outlet of the continuous casting machine is 100-150°C higher than that of the ESP production line, which improves the utilization rate of waste heat of the continuous casting slab and reduces energy consumption; compared with the ESP production line, the swing shear and pusher roller table are moved to the roughing mill Before, shorten the distance between the intermediate rollers after rough rolling, reduce the temperature drop of the intermediate billet, reduce the induction heat compensation, and avoid thermal cracks in the rough rolling mill rolls. The entrance of the roughing rolling mill is equipped with a descaling device, and the finishing rolling mill adopts online hot backup technology and online rapid roll change technology to effectively improve the surface quality of the product.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled strip steel rolling, in particular to a method for manufacturing thin-gauge hot-rolled strip steel. Background technique [0002] The emergence of the ESP thin slab endless rolling production line has made the large-scale and stable production of thin-gauge hot-rolled strip steel a reality. On the Arvedi ESP production line, through the continuous production process, molten steel passes directly through a continuous casting machine and rolling line to produce hot-rolled steel coils. The production line first casts thin slabs, and then directly enters the three-stand large-reduction roughing mill arranged at the exit of the continuous casting machine for rolling, rolling into an intermediate billet with a thickness of 10-20mm, and then the intermediate billet is placed in the induction heater Heating is performed and then rolled to the target thickness by a five-stand finishing mill, after whic...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a thin-gauge hot-rolled steel strip manufacturing method to solve the problems of high power consumption and poor surface quality of the current ESP production line

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