Method for improving flanging of thin strip steel coil

A thin strip steel and flanging technology, applied in the configuration of indicating equipment/measuring equipment, manufacturing tools, special data processing applications, etc., can solve the problem of unstable edge thickness, edge flanging of steel coils, continuous casting of thin strips The thickness of the steel edge is thick, etc., to achieve the effect of solving the thicker thickness, improving the quality, and increasing the qualified rate

Active Publication Date: 2022-01-21
SHAGANG GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current existing technology cannot solve the problems of thicker edge thickness of continuous casting thin strip steel, unstable edge thickness, and edge flanging of steel coils

Method used

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  • Method for improving flanging of thin strip steel coil
  • Method for improving flanging of thin strip steel coil
  • Method for improving flanging of thin strip steel coil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] During the steelmaking process, the hydrogen content H in molten steel is controlled to be 3.9ppm. The molten steel may include low-carbon molten steel, high-carbon molten steel, low-alloy molten steel, and high-alloy molten steel.

[0040] Before continuous casting of thin strip steel, the preheating time of various refractory materials is controlled to 203min. The refractory material can include tundish, transition bag, cloth spout, side sealing device.

[0041] The edge pressure of the crystallization roller takes the initial value F 0 Continuous casting of thin strip steel for 5KN.

[0042] Take the range where the edge L of the thin strip steel is 300mm as the thickness measurement area, and take a point at every width A of 15mm to measure the thickness. The thicknesses of 21 sampling points are measured as follows:

[0043] 1.721mm, 1.724mm, 1.776mm, 1.766mm, 1.746mm, 1.735mm, 1.728mm, 1.724mm, 1.721mm, 1.714mm, 1.717mm, 1.723mm, 1.727mm, 1.728mm, 1.728mm, 1.72...

Embodiment 2

[0052] During the steelmaking process, the hydrogen content H in the molten steel is controlled to be 4.3ppm. The molten steel may include low-carbon molten steel, high-carbon molten steel, low-alloy molten steel, and high-alloy molten steel.

[0053] Before continuous casting of thin strip steel, the preheating time for various refractory materials is 87 minutes. The refractory material can include tundish, transition bag, cloth spout, side sealing device.

[0054] The edge pressure of the crystallization roller takes the initial value F 0 Continuous casting of thin strip steel for 3.2KN.

[0055] Take the range where the edge L of the thin strip steel is 216mm as the thickness measurement area, and take a point at every width A of 18mm to measure the thickness. The thicknesses of 13 sampling points are measured as follows:

[0056] 1.718mm, 1.717mm, 1.714mm, 1.71mm, 1.706mm, 1.71mm, 1.715mm, 1.718mm, 1.723mm, 1.735mm, 1.758mm, 1.775mm, 1.729mm.

[0057] According to the ...

Embodiment 3

[0065] During the steelmaking process, the hydrogen content H in the molten steel is controlled to be 4.8ppm. The molten steel may include low-carbon molten steel, high-carbon molten steel, low-alloy molten steel, and high-alloy molten steel.

[0066] Before continuous casting of thin strip steel, the preheating time for various refractory materials is 327min. The refractory material can include tundish, transition bag, cloth spout, side sealing device.

[0067] The edge pressure of the crystallization roller takes the initial value F 0 Continuous casting of thin strip steel for 2KN.

[0068] Take the range where the edge L of the thin strip steel is 60 mm as the thickness measurement area, and take a point every 5 mm in width A to measure the thickness. The thicknesses of 13 sampling points are measured as follows:

[0069] 1.733mm, 1.747mm, 1.75mm, 1.749mm, 1.744mm, 1.741mm, 1.745mm, 1.749mm, 1.751mm, 1.752mm, 1.75mm, 1.748mm, 1.745mm.

[0070] According to the thickness...

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Abstract

The invention belongs to the field of thin-strip continuous casting, and relates to an edge quality control technology of thin strip steel produced through thin-strip continuous casting, in particular to a production control method for improving flanging of a thin-strip continuous casting thin strip steel coil. By controlling the H content of continuous casting molten steel and the baking time of various refractory materials before casting, the H content of the molten steel in a molten pool in the continuous casting process of thin strip steel is controlled, the heat conduction efficiency between the molten steel on the edge of the molten pool and a crystallization roller is improved, the thickness of a blank shell obtained by molten steel solidification is increased, and the influence of static pressure of the molten steel on the edge thickness of the continuous casting thin strip steel is reduced. Meanwhile, by measuring the difference value between the maximum value and the minimum value of the thickness of the thick area of the edge area of the thin strip steel, a mathematical model of the edge pressure of the crystallization roller and the difference value is established, and the control value of the edge pressure of the crystallization roller is adjusted in real time. The problem of flanging of the strip steel coil in the thin-strip continuous casting thin strip steel production process can be solved, so that the edge quality of the thin strip steel coil and the product percent of pass are improved.

Description

technical field [0001] The invention belongs to the field of thin strip continuous casting, and relates to a coil shape control technology of hot-rolled thin strip steel coils for thin strip continuous casting, in particular to a production control method for improving the flanging of continuous casting thin strip steel coils. Background technique [0002] The twin-roll strip continuous casting process is to enter the molten steel into the molten pool formed by a pair of counter-rotating crystal rolls through the distribution nozzle. The molten steel contacts the surface of the crystal rolls with a lower temperature to form a solid shell, which rotates with the casting roll The surface of the crystal roll is exported to form a continuous casting belt. The edge of the thin strip steel casting strip is in contact with the edge of the crystallization roll and the side seal area of ​​the molten pool. The stress field, temperature field, and flow field in the area where it is loc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/20B22D11/16B22D2/00G06F30/20
CPCB22D11/20B22D11/16B22D2/00G06F30/20Y02P10/20
Inventor 陈爱华李化龙翟义庆施一新刘玉君李霞钱斌王宇豪
Owner SHAGANG GROUP
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