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Method for controlling ferritic stainless steel tail billet width

A stainless steel and ferrite technology, which is used in the field of controlling the width of stainless steel tail blanks, and can solve the problems of large target width tolerance and so on.

Inactive Publication Date: 2015-07-22
BAOSTEEL STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this question (referring to the actual width W actual with W aim The problem of large target width tolerance) currently there is no targeted solution

Method used

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  • Method for controlling ferritic stainless steel tail billet width
  • Method for controlling ferritic stainless steel tail billet width
  • Method for controlling ferritic stainless steel tail billet width

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Embodiment Construction

[0036] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings of the embodiments.

[0037] The current steel mills have strict control on the width tolerance of the slab. The enterprise standard, industry standard and national standard of the slab have strict regulations on the width of the slab. Generally, the width tolerance of the cast slab is required to be ±10mm, that is, the actual Width W actual with target width W aim must satisfy the following relationship:

[0038] W aim -10mm≤W actual ≤W aim +10mm Formula (3)

[0039] As the pulling speed gradually decreases during the finishing process, the actual width W actual It will be narrowed beyond the negative tolerance requirement. Therefore, in order to make the tail slab meet the requirements, the continuous casting side can only cut the slab to ensure that the width of the tail of the slab is ≥W aim -10mm; this will generate a ...

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Abstract

The invention relates to a method for controlling tail billet width, in particular to a method for controlling the ferritic stainless steel tail billet width. According to the invention, the back taper of each of copper plates on the left side and the right side of a crystallizer is a normal angle in the normal casting process; in the process of tail-out of casting, the casting speed is lowered, width adjustment operation is carried out, and firstly taper adjustment operation is carried out on the back taper of each of the copper plates on the left side and the right side of the crystallizer; the upper opening range of the crystallizer is enlarged, and the back taper angle is increased; width adjustment operation is carried out on the copper plates on the left side and the right side of the crystallizer; the copper plates on the left side and the right side of the crystallizer are moved outwards for a certain distance; taper recovery operation is carried out on the copper plates on the left side and the right side of the crystallizer, the upper opening range is narrowed so that the back taper angle can be normal, and then the lower opening width of the crystallizer is greater than the original lower opening width; width adjustment operation is completed, and continuous casting equipment continues normal casting until final ending. By increasing the lower opening width of the crystallizer, width reduction caused by pulling rate reduction of ferritic stainless steel slabs can be offset so that the final tail billet width can meet the tolerance requirement.

Description

technical field [0001] The invention relates to a method for controlling the width of a stainless steel tail blank, in particular to a method for controlling the width of a ferritic stainless steel tail blank. Background technique [0002] Continuous casting is a process in which molten steel is poured, condensed, and cut to obtain a slab (slab). like figure 1 As shown, the most important part of this process is to pour one or more furnaces of molten steel into the crystallizer 3 continuously through the ladle 1 and the tundish 2, and then water-cool in the crystallizer 3 composed of four copper plates to obtain a solid shell around , the middle part of the slab shell is still the slab of molten steel. Then the cast slab is gradually solidified through the secondary cooling 4, and is pulled out of the continuous casting machine body by the support and rotation of the rollers in the tension straightening device 5, and then cut into slabs of a certain length by the cutting d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/20B22D11/128
Inventor 苏锦潘强陆力军杨军朱文杰
Owner BAOSTEEL STAINLESS STEEL
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