Control method for head warpage of plate blank

Abstract

The invention discloses a control method for head warpage of a plate blank, and belongs to the technical field of steel rolling. The method comprises the following steps of controlling outlet steel ofthe plate blank according to a preset temperature difference in a heating furnace area; controlling the speed difference between an upper roller and a lower roller of a rolling machine in a rough rolling area, and regulating the SKI value range of rolling to be 102 to 108 percent; removing pass descaling water of the plate blank in a rough rolling machine, or, controlling the head of the plate blank to perform descaling; turning off cooling water of a vertical roller sliding rail before the plate blank enters the rough rolling machine, and, turning on the cooling water after a preset time after the steel of the plate blank is bitten; and controlling pass load distribution of the plate blank in the rough rolling machine so that the rolling reduction of the plate blank is reduced by 5 to 10percent. Through the method, the technical problem that a head warpage phenomenon can often be caused in the rough rolling area of a production line in the prior art is solved; and the technical effects of shortening accident time and non-scheduled shutdown time, relieving the head warpage problem of the plate blank, greatly reducing head warpage accidents, and improving the operation rate of a production line are achieved.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a method for controlling slab warping. Background technique [0002] In the production process of hot-rolled wide-band steel, it is very important to control slab warping after rolling. Slab warping often occurs in the rough rolling area of ​​Shougang Jingtang 2250mm production line, especially at the exit of R1 and R2 rolling mills. The warping head will cause damage to the collision equipment. For example, when the warping head is large, it is easy to hit the water tank or the upper beam and cause a steel pile accident. Contents of the invention [0003] The invention provides a method for controlling slab warping, which is used to solve the phenomenon that slab warping often occurs in the rough rolling area of ​​the production line in the prior art, causing damage to the bumping equipment, such as when the warping is large, it is easy to hit the water tank Or the tech...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for controlling slab warping, which is used to solve the phenomenon that slab warping often occurs in the rough rolling area of ​​the production line in the prior art, causing damage to the bumping equipment, such as when the warping is large, it is easy to hit the water tank Or the technical problem of stacking steel accidents caused by the upper beam, which reduces the accident time and unplanned downtime, alleviates the problem of slab warping, greatly reduces the occurrence of warping accidents, and improves the production line operation rate. Effect

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