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Width control method for ferrite hot rolling stainless steel wedge-shaped plate blank

A technology of width control and wedge-shaped slabs, which is applied in the field of steel rolling in metallurgical enterprises, can solve problems such as uncontrolled width and hot-rolled scrap failures, and achieve the effect of improving rolling stability and width accuracy

Active Publication Date: 2014-08-27
SHANXI TAIGANG STAINLESS STEEL CO LTD
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AI Technical Summary

Problems solved by technology

[0006] In order to control the width of the narrowest part of the wedge-shaped slab head and tail, and solve the phenomenon of uncontrolled width caused by free widening, the invention provides a method for controlling the width of a ferritic hot-rolled stainless steel wedge-shaped slab
[0007] The invention aims at improving the problem that the free width of the narrowest part of the wedge-shaped billet head and tail end of the ferritic stainless steel controlled by the small side pressure width of the vertical roll is not controlled, which easily leads to failure of hot-rolled scrap steel, and saves the problem to the greatest extent. Improve the rolling stability and width accuracy of hot-rolled ferritic stainless steel by using blanks with unqualified width dimensions in the steelmaking process

Method used

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Embodiment Construction

[0019] Example: In order to save the wedge-shaped billet caused by switching crystallizers in the upstream steelmaking process to the greatest extent, and ensure the stability and width accuracy of hot rolling, a hot rolling width control method based on ferritic stainless steel wedge-shaped billet was developed. The main technical solutions are as follows:

[0020] 1. Increase the slab width measuring equipment to measure the slab width online

[0021] Since the actual width of slabs in the 2250mm production line of Taiyuan Iron and Steel Co., Ltd. fluctuates greatly, the deviation from its nominal width can reach ±40mm, and there are many wedge-shaped slabs. Therefore, in order to reduce the influence of slab width fluctuations on the width control of finished products, it is necessary to install a slab width gauge. , in order to realize the online measurement function of the slab width.

[0022] The slab width gauge can be installed at the feeding roller table in front of...

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Abstract

The method for controlling the width of a ferritic hot-rolled stainless wedge-shaped slab belongs to the steel rolling field of metallurgical enterprises, and includes the installation of a slab width gauge. ;According to the slab traveling direction, store the on-line detection value of the slab width in the slab width measurement database; calculate the measured width of the slab head, the measured width of the slab middle and the measured width of the slab tail; confirm the slab width measurement value Reliability; the width control system compares the measured width value of the slab head with the measured width value of the slab tail, and uses the minimum value of the measured width value of the slab head and the measured width value of the slab tail to replace the nominal width of the slab. Rough rolling width control. The invention solves the problem that the free width of the head and the tail of the ferritic stainless steel wedge-shaped billet is uncontrolled due to the small side pressure width control, which leads to the failure of scrap steel in the rolling line.

Description

technical field [0001] The invention belongs to the field of steel rolling in metallurgical enterprises, and in particular relates to a method for controlling the width of a ferrite hot-rolled stainless wedge-shaped slab. Background technique [0002] Ferritic stainless steel refers to stainless steel with a chromium content of 11-30% and a ferritic structure. It can be divided into ordinary ferritic stainless steel and ultra-pure ferritic stainless steel. Commonly used ferritic stainless steels are: 430, 00Cr12Ti, 0Cr13, 0Cr13R, 1Cr17, etc. [0003] The material of ferritic stainless steel is relatively soft, and the wedge shape of the continuous casting slab is very prominent. The width of the slab through the slab varies greatly, and the width difference between the head and the tail even exceeds 30mm. Therefore, during the rough rolling process of the wedge-shaped billet, because there is no side pressure of the vertical roll at the narrowest part of the wedge-shaped bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B37/22B21B38/04
Inventor 王津平张永宏任万牢张维利
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD