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Method for improving bending of head portion of medium plate

A head-bending and head-bending technology, which is applied in the field of improving the head bending of medium and heavy plates, can solve problems such as poor plate shape, and achieve the effects of reducing cutting damage, improving yield, and protecting equipment.

Inactive Publication Date: 2013-08-07
INNER MONGOLIA BAOTOU STEEL UNION
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Problems solved by technology

[0004] In the prior art, the bending phenomenon of the steel plate head can be controlled through continuous research. Although the bending degree of the steel plate head is often controlled, the shape of the steel plate head still has the phenomenon of bending, and the bad shape of the plate is as follows: image 3 shown

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  • Method for improving bending of head portion of medium plate
  • Method for improving bending of head portion of medium plate
  • Method for improving bending of head portion of medium plate

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Embodiment Construction

[0026] The present invention studies the control of the bending phenomenon of the steel plate head from another angle, by controlling the biting speed and biting length of the steel plate to further control the bending of the head of the steel plate to avoid bending and image 3 Bad shape shown.

[0027] Such as Figure 4 Shown is the speed-time curve diagram in the steel plate rolling process in the present invention. In the present invention, the strategies of low-speed biting, rising-speed rolling, and low-speed steel throwing are adopted. During the rolling and warming process of medium and heavy plates, uneven heat dissipation occurs on the plate body. Under the influence of factors such as descaling water, rack cooling water, roller table cooling water and heat exchange with the surrounding environment, the heat dissipation around the steel plate body is relatively small. The middle part of the plate body should be fast, so the temperature around the plate body of the ...

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Abstract

The invention discloses a method for improving the bending of the head portion of a medium plate. According to the method, the bending degree of a rolled steel plate and the shape of the head low temperature region of the steel plate are controlled by adjusting and optimizing steel biting parameters of the steel plate, the steel biting parameters include biting speed and biting length, the low speed steel biting is performed at the biting length, and the speed-raised rolling is performed when rolling length exceeds the biting length. The method overcomes some shortcomings of a traditional control method, the head portion of a produced steel plate is in a good shape of a flat shape or a slightly-tilted shape, and the cutting loss caused by the bending of the head portion and poor shapes is reduced.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled medium-heavy plates, and in particular relates to a method for improving the head bending of medium-heavy plates. Background technique [0002] After the medium and heavy plate is rolled, the ideal shape of the plate is a straight head, but in the actual production process, the head of the steel plate shows different degrees of bending, which can be divided into downward bending "warping head" and upward bending "knock head". ,(See figure 1 ), the bending state of the steel plate during the rolling process is as follows figure 2 shown. Usually, the factors that cause the bending of the steel plate head are: the uneven temperature of the upper and lower surfaces of the billet, the different speeds of the upper and lower work rolls of the rolling mill, the different diameters of the upper and lower work rolls of the rolling mill, and the reduction rate of a single pass. [0003] The patent ap...

Claims

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Application Information

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IPC IPC(8): B21B37/72
Inventor 刘泽田董瑞峰张大治刘海涛张军高军张晓燕刘哲温利军柳志钢唐家宏刘丹
Owner INNER MONGOLIA BAOTOU STEEL UNION