Method for improving edge profile of thin strip steel

A thin strip and profile technology is applied in the field of production control for improving the edge profile of continuous casting thin strip, which can solve the problems such as the inability to solve the edge profile of thin strip casting, and achieves solutions such as poor profile, poor profile, etc. Improve product quality and improve the effect of plate profile

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

[0005] The existing technology is still unable to solve the problem of the edge plate shape profile of the thin strip steel cast strip

Method used

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  • Method for improving edge profile of thin strip steel
  • Method for improving edge profile of thin strip steel
  • Method for improving edge profile of thin strip steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Continuous casting of thin strip steel with a width of 1690mm, real-time detection of continuous casting speed v in the process of continuous casting of thin strip steel 0 It is 70m / min, and the thickness of the edge of the strip is detected by a thickness detector.

[0035] Get edge position L 1 at 59mm, width range B 1 Thickness extremum h within 26mm 1 is 1.45mm.

[0036] Get the secondary edge position L 2 at 117mm, width range B 2 Thickness extremum h within 19mm 2 is 1.41mm.

[0037] Get strip width center L 3 (1 / 2 of strip width 1690mm) is 845mm, width range B 3 The thickness extremum h within 38mm is 1.8mm.

[0038] Combining the width of the thin strip and the casting speed v 0 , select the empirical parameter a of thickness deviation as 9, and pass the formula:

[0039]

[0040] The calculated and returned updated continuous casting speed value v is 70.33m / min for real-time speed feedback of continuous casting speed.

[0041] Through fast feedba...

Embodiment 2

[0043] Continuous casting of thin strip steel with a width of 1340mm, real-time detection of continuous casting speed v in the process of continuous casting of thin strip steel 0 It is 42m / min, and the thickness of the edge of the strip is detected by a thickness detector.

[0044] Get edge position L 1 at 32mm, width range B 1 Thickness extremum h within 19mm 1 is 1.39mm.

[0045]Get the secondary edge position L 2 at 99mm, width range B 2 Thickness extremum h within 16mm 2 is 1.36mm.

[0046] Get strip width center L 3 (1 / 2 of strip width 1340mm) at 670mm, width range B 3 The thickness extremum h within 31 mm is 1.6 mm.

[0047] Combining the width of the thin strip and the casting speed v 0 , select the thickness deviation parameter a to be 16, and pass the formula:

[0048]

[0049] The calculated and returned updated continuous casting speed value v is 42.11m / min for real-time speed feedback of continuous casting speed.

[0050] Through fast feedback on the...

Embodiment 3

[0052] Continuous casting of 950mm wide thin strip steel, real-time detection of continuous casting speed v in the process of continuous casting of thin strip steel 0 It is 96m / min, and the thickness of the edge of the strip is detected by a thickness detector.

[0053] Get edge position L 1 at 24mm, width range B 1 Thickness extremum h within 9mm 1 is 1.27mm.

[0054] Get the secondary edge position L 2 at 83mm, width range B 2 Thickness extremum h within 12mm 2 is 1.26mm.

[0055] Get strip width center L 3 (1 / 2 of the strip width 950mm) is 475mm, width range B 3 The thickness extremum h within 22 mm is 1.4 mm.

[0056] Combining the width of the thin strip and the casting speed v 0 , select the thickness deviation parameter a to be 1.7, and pass the formula:

[0057]

[0058] The returned velocity value v is calculated to be 96.21m / min for real-time velocity feedback of continuous casting velocity.

[0059] Through fast feedback on the real-time continuous ca...

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Abstract

The invention belongs to the field of thin-strip continuous casting, and relates to a strip shape control technology of hot-rolled thin strip steel, in particular to a method for improving the edge profile of continuous casting thin strip steel. According to the method, the continuous casting speed of the thin strip steel is adjusted in real time in the casting process, so that the purpose of improving the edge strip shape profile of the continuous casting thin strip steel is achieved. According to the method for improving the edge profile of the thin strip steel, the edge strip shape profile, the secondary edge strip shape profile and the strip shape profile of the strip steel center area in the continuous casting process of the thin strip steel are detected, and a mathematical model is established through extreme values of scatter values of the strip shape profiles of the three areas and the continuous casting speed. The mathematical model is applied to continuous casting speed control in the continuous casting process of the thin strip steel, so that real-time continuous casting speed response is achieved, the overall strip shape profile of the continuous casting thin strip steel is improved by adjusting the continuous casting speed, the edge profile of the thin strip steel is improved, therefore, the problems that the edge thickness of the continuous casting thin strip steel is too large, and the edge of a steel roll of the thin strip steel swells are solved.

Description

technical field [0001] The invention relates to the technical field of shape control of hot-rolled thin strip steel, in particular to a production control method for improving the edge profile of continuous cast thin strip steel. Background technique [0002] The twin-roll thin strip continuous casting process is to enter the molten steel into the molten pool formed by a pair of oppositely rotating casting rolls through the distribution nozzle. Lead out of the casting roll surface to form a continuous casting belt. The edge of the thin strip cast strip is in contact with the edge of the casting roll and the side sealing area of ​​the molten pool, and the stress field, temperature field, and flow field in the area where it is located are quite different from the center area, and the profile of the strip edge area Control is extremely difficult. [0003] The edge profile of continuously cast thin strip is closely related to the stability of continuous production and the qual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/20
CPCB22D11/207
Inventor 陈爱华李化龙翟义庆施一新刘玉君李婷婷钱斌吴宪亮
Owner SHAGANG GROUP
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