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Method for producing hot-rolled strip steel with thickness of 1.0 mm by adopting CSP production line

A hot-rolled strip and production line technology, applied in metal rolling, profile control, etc., can solve the problems of poor stripping stability and difficult shape control, and achieve excellent shape and coil shape, thin specifications, meet the Green and lightweight effects

Pending Publication Date: 2022-05-27
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The present invention aims to overcome the technical problems of poor strip threading stability and difficulty in shape control of rolling 1.0mm hot-rolled ultra-thin strip steel in the prior art, and provides a 1.0mm hot-rolled ultra-thin steel strip that can stably produce 1.0mm hot-rolled ultra-thin steel strip in a CSP production line. Strip steel, and the method of producing hot-rolled strip steel with a thickness of 1.0 mm by using a CSP production line with excellent plate shape and coil shape

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A method for producing hot-rolled strip steel with a thickness of 1.0 mm using a CSP production line, the steps of which are as follows:

[0045] 1) After smelting, it is cast into a billet, and the thickness of the billet is controlled at 54mm by using a liquid core pressing method in the casting into a billet;

[0046] 2) Heating the slab, the heating temperature is controlled at 1203°C, and the heating time is 31min;

[0047] 3) Carry out secondary descaling on the slab: the pressure of the first descaling water is controlled at 181 bar, and the pressure of the second descaling water is 206 bar; and the first and second descaling upper header nozzles are controlled to the casting The distance between the blank surface is 55mm;

[0048] 4) Seven passes of rolling are carried out, and the operations in each stage are as follows:

[0049] In the threading stage, the thickness of the threading is 1.05mm; the threading speed is 9.5m / s, and after the threading is complet...

Embodiment 2

[0059] A method for producing hot-rolled strip steel with a thickness of 1.0 mm using a CSP production line, the steps of which are as follows:

[0060] 1) After smelting, it is cast into a billet, and the thickness of the billet is controlled at 52mm by using a liquid core pressing method in the casting into a billet;

[0061] 2) Heating the slab, the heating temperature is controlled at 1210°C, and the heating time is 33min;

[0062] 3) Carry out secondary descaling of the slab: the pressure of the first descaling water is controlled at 185 bar, and the pressure of the second descaling water is 208 bar; and the first and second descaling upper header nozzles are controlled to the slab The distance between the surfaces is 57mm;

[0063] 4) Seven passes of rolling are carried out, and the operations in each stage are as follows:

[0064] In the threading stage, the thickness of the threading is 1.05mm; the threading speed is 9.6m / s, and after the threading is completed, it i...

Embodiment 3

[0074] A method for producing hot-rolled strip steel with a thickness of 1.0 mm using a CSP production line, the steps of which are as follows:

[0075] 1) After smelting, it is cast into a billet, and the thickness of the billet is controlled at 55mm by using a liquid core pressing method in the casting into a billet;

[0076] 2) Heating the slab, the heating temperature is controlled at 1212°C, and the heating time is 35min;

[0077] 3) Carry out secondary descaling of the slab: the pressure of the first descaling water is controlled at 189 bar, and the pressure of the second descaling water is 209 bar; and the first and second descaling upper header nozzles are controlled to the slab The distance between the surfaces is 60mm;

[0078] 4) Seven passes of rolling are carried out, and the operations in each stage are as follows:

[0079] In the threading stage, the thickness of the threading is 1.05mm; the threading speed is 9.8m / s, and after the threading is completed, it i...

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Abstract

The invention discloses a method for producing hot-rolled strip steel with the thickness of 1.0 mm by adopting a CSP production line. The method comprises the following steps: smelting and casting into a blank; heating the casting blank; carrying out secondary descaling on the casting blank; carrying out seven-pass rolling; carrying out laminar cooling to a coiling temperature; and coiling. According to the method, the technical problems of poor strip threading stability, high plate shape control difficulty and the like during short-process rolling of the 1.0 mm hot-rolled ultra-thin strip steel are solved, stable large-scale production of the 1.0 mm hot-rolled ultra-thin strip steel during short-process rolling is realized, the product has the characteristics of thin specification and excellent plate shape and coil shape, the purpose of replacing cold-rolled products in batches is achieved, and the production cost is reduced. And the green and light-weight requirements of steel and iron manufacturing are met.

Description

technical field [0001] The invention relates to a method for producing strip steel, in particular to a method for producing hot-rolled strip steel with a thickness of 1.0 mm using a CSP production line. Background technique [0002] The traditional ultra-thin strip steel, especially the products with a thickness of less than 2.0mm, adopts the manufacturing process of hot rolling and cold rolling, which has a long process flow, high energy consumption and high manufacturing cost. With the development of the iron and steel industry, the short-flow process has made great progress. The short-flow process can directly roll hot-rolled products with a thickness of 1.0 to 1.05mm, which can be used to replace cold-rolled products of the same strength and thickness. Realize "replacing cold with heat". The manufacturing process can be greatly shortened, and the effect of energy saving and emission reduction is remarkable, which is in line with the development direction of the iron and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/26B21B37/44
CPCB21B1/26B21B37/44
Inventor 田军利宋波高智李波赵敏叶盛赵强
Owner 武汉钢铁有限公司
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