Method for rolling steel plate with heavy and medium plate mill

A technology for rolling steel plates and rolling mills, which is applied in the field of rolling steel plates by medium and heavy plate rolling mills. It can solve the problems of the difference in vertical and horizontal properties of steel plates, and achieve the effect of reducing the difference in vertical and horizontal properties and ensuring the economical efficiency of products.

Inactive Publication Date: 2013-10-02
ANGANG STEEL CO LTD
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Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the object of the present invention i

Method used

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  • Method for rolling steel plate with heavy and medium plate mill

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[0024] Examples:

[0025] 1. Blank design: The material is general plate Q235B, the rolling thickness and width are 5×3100mm, and the blank size is 115×1450×3200mm. According to the principle of constant volume, the rolling specification is calculated to be 5×3100×34425mm ;

[0026] 2. It is heated by a continuous heating furnace, the furnace time is 190min, the soaking time is 28min, and the soaking temperature is 1230℃;

[0027] 3. Replace the new work roll more than 60 minutes before the billet is out of the furnace. After the roll change, 35 pieces of steel plates with a thickness of 30~6mm and a width of 2800~3500mm are continuously rolled. The thickness of the last 8 pieces of steel plate is arranged from thick to thin. The order is 10mm, 8mm, 7mm, 6mm, two steel plates for each thickness specification.

[0028] 4. The main parameters of the rolling mill are set as follows: bite speed 2m / s, maximum rolling speed 5m / s, stand acceleration 2 m / s 2 ,, the throwing distance is 2m, t...

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Abstract

The invention relates to a method for rolling a steel plate with a heavy and medium plate mill. According to the method for rolling the steel plate with the heavy and medium plate mill, a steel plate with a thickness of 5-6mm is manufactured with the heavy and medium plate mill and is heated with a stepping heating furnace, the steel plate is put into the stepping heating furnace for 180-240 min, and soaking is carried out for 28-35 min at the temperature of 1210-1230 DEG C; the temperature for initial rolling is 1150-1180 DEG C and the temperature for final rolling is controlled between 800 DEG C and 900 DEG C; the cycle of a working roller is 500-800t; the maximum pressing reduction is 48-52mm every single time, and the maximum rolling force is 90000 kN; the roll bending force of the working roller is 1000-2000 kN, and the deviation range of the working roller is -50-+100mm. The method for rolling the steel plate with the heavy and medium plate mill has the advantages that the ultrathin steel plate with the thickness of 5-6mm and with a width more than 3000mm can be rolled, and the difference between the longitudinal performance and the horizontal performance of the steel plate is reduced.

Description

technical field [0001] The invention relates to a plate rolling process, in particular to a method for rolling a steel plate with a medium-thick plate rolling mill. Background technique [0002] In shipbuilding, container and other industries, varieties with a strength of 345MPa and below are usually used, and a small amount of 5-6mm thick steel plates of extreme specifications are often required. Generally, 5mm thick steel plates are rolled by hot tandem rolling mills and steckel rolling mills, and the plate width is usually below 2000mm. Moreover, the vertical and horizontal properties of the steel plate are quite different, and the steel types are limited, which cannot meet the market demand. The minimum thickness of most medium and heavy plate rolling mills is 6mm. Due to the influence of equipment capacity, camber, plate shape, temperature and other factors in the rolling process, it is impossible to produce steel plates with a thickness below 6mm. Contents of the inv...

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Application Information

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IPC IPC(8): B21B1/38
Inventor 李靖年潘凯华张健王若钢李新玲刘浩岩刘立强陈付振孙铁彪于峰
Owner ANGANG STEEL CO LTD
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