Plate shape control method of hot-rolling and coiled-rolling steel plate of single-rack steekle mill

Abstract

The invention belongs to the field of steel rolling and discloses a plate shape control method of a hot-rolling and curved-rolling steel plate of a single-rack steekle mill. The plate shape control technology of the hot-rolling and curved-rolling steel plate of the single-rack steekle mill is realized by the steps of adjusting a heating system, optimizing temperature setting of a coiler furnace, adjusting coiled-rolling tension force of the coiler furnace, optimizing a down-pressing system, utilization of bending rolling force of a milling machine and a straightening machine as well as a roller convex degree of a working roller, improving temperature of cooling water which keeps a thin coiled-rolling plate, using an edge shielding function of a laminar flow cooling system, comprehensively adjusting straightening process of edge rollers and bending rollers of a hot straightening machine and the like. When a long billet with a thickness of 150 mm to 220 mm and a steel plate with a rolling thickness not greater than 12 mm are used, the plate shape control method disclosed by the invention has the advantages of synthetically controlling plate shape of the coiled-rolling steel plate and optimizing mechanical properties of the coiled-rolling plate.

Description

technical field [0001] The invention belongs to the field of steel rolling, and relates to a method for controlling the shape of a steel plate, in particular to a method for controlling the shape of a hot-rolled coiled steel plate in a single-stand furnace coil mill. Background technique [0002] At present, when using 150mm ~ 220mm thick billet rolling to produce thin gauge (thickness ≤ 12mm) steel plate, the performance and shape need to be controlled at the same time. If the billet with a rolling length of more than 10m is rolled, the thickness of the final rolled piece is ≤12mm, the length is ≥150m, and the longest can reach more than 250m. [0003] Since the rolled piece is too long in the finishing rolling stage, during the rolling process, as the steel plate becomes thinner and longer, the temperature of the steel plate will drop faster and faster, especially at the rolling head. At the end, the temperature drop is faster, resulting in extremely uneven temperature di...

AI Technical Summary

Problems solved by technology

[0003] Since the rolled piece is too long in the finishing rolling stage, during the rolling process, as the steel plate becomes thinner and longer, the temperature of the steel plate will drop faster and faster, especially at the rolling head. The temperature drop is faster, resulting in extremely uneven temperature distribution along the length of the rolled piece, which increases the difficulty of controlling the shape and performance of the rolled piece

For this reason, it is an urgent problem to develop a shape control process for rolling thin-gauge steel plates with long billets, especially when the length of the billet is more than 10m, the performance and performance of the rolled piece will be too large and the temperature drop will be too fast. A series of problems such as plate shape

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