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Crystallizer for removing surface cracks of peritectic steel continuous casting slab and control method

A surface crack and crystallizer technology, applied in the field of iron and steel metallurgy, can solve problems such as surface cracks, segregation, and air gaps, and achieve the effects of reducing thermal stress, improving uniformity, and reducing incidence

Active Publication Date: 2021-05-04
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the problems that peritectic steel is prone to defects such as surface cracks, segregation and air gaps, the present invention provides a method for solving the surface cracks of peritectic steel continuous casting slabs Mold, reduce the air gap between the primary shell of the mold and the copper plate of the mold, to achieve the purpose of controlling the uniform growth of the shell and reducing the incidence of surface cracks

Method used

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  • Crystallizer for removing surface cracks of peritectic steel continuous casting slab and control method
  • Crystallizer for removing surface cracks of peritectic steel continuous casting slab and control method
  • Crystallizer for removing surface cracks of peritectic steel continuous casting slab and control method

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Embodiment 1

[0041] like figure 1 It is a schematic diagram of the cross-sectional structure of a common crystallizer, such as Figure 2-4 As shown, a mold for solving cracks on the surface of peritectic steel continuous casting slabs in this embodiment includes a wide-faced copper plate 1 and a narrow-faced copper plate 2, the wide-faced copper plate 1 and the narrow-faced copper plate 2 are connected, and the wide-faced copper plate 1 The inner surface includes a first plane 11 and a second plane 12, the first plane 11 and the second plane 12 are connected, and there is an angle between the first plane 11 and the second plane 12 and the vertical plane, and the angle is Acute angle; the inner surface of the narrow copper plate 2 includes a third plane 21 and a fourth plane 22, the third plane 21 and the fourth plane 22 meet, and there is an angle between the third plane 21 and the fourth plane 22 and the vertical plane , and the included angle is an acute angle. Adopting the new crystal...

Embodiment 2

[0050] A crystallizer of this embodiment is used to solve cracks on the surface of peritectic steel continuous casting slabs, the height of the crystallizer is 900mm, and the reverse taper is 0.90%. The crystallizer includes a wide-faced copper plate 1 and a narrow-faced copper plate 2, the wide-faced copper plate 1 and the narrow-faced copper plate 2 are connected, the inner surface of the wide-faced copper plate 1 includes a first plane 11 and a second plane 12, and the first plane 11 and the second plane 12, the first plane 11 and the second plane 12 have an included angle with the vertical plane, and the included angle is an acute angle; the inner surface of the narrow copper plate 2 includes a third plane 21 and a fourth plane 22, and the third plane 21 and the fourth plane 22 are connected, and the third plane 21 and the fourth plane 22 have an included angle with the vertical plane, and the included angle is an acute angle. The angle between the first plane 11 and the v...

Embodiment 3

[0052] The crystallizer of this embodiment is used to solve the cracks on the surface of the peritectic steel continuous casting slab. The height of the crystallizer is 900 mm, and the reverse taper is 1.15%. The crystallizer includes a wide-faced copper plate 1 and a narrow-faced copper plate 2, the wide-faced copper plate 1 and the narrow-faced copper plate 2 are connected, the inner surface of the wide-faced copper plate 1 includes a first plane 11 and a second plane 12, and the first plane 11 and the second plane 12, the first plane 11 and the second plane 12 have an included angle with the vertical plane, and the included angle is an acute angle; the inner surface of the narrow copper plate 2 includes a third plane 21 and a fourth plane 22, and the third plane 21 and the fourth plane 22 are connected, and the third plane 21 and the fourth plane 22 have an included angle with the vertical plane, and the included angle is an acute angle. The angle between the first plane 11...

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Abstract

The invention discloses a crystallizer for removing surface cracks of a peritectic steel continuous casting slab and a control method, and belongs to the technical field of ferrous metallurgy. The crystallizer comprises a wide-face copper plate and a narrow-face copper plate, wherein the wide-face copper plate is connected with the narrow-face copper plate; the inner surface of the wide-face copper plate comprises a first plane and a second plane; the first plane is connected with the second plane; included angles are formed between the first plane and the vertical plane and between the second plane and the vertical plane, and the included angles are acute angles; the inner surface of the narrow-face copper plate comprises a third plane and a fourth plane; the third plane is connected with the fourth plane; and included angles are formed between the third plane and the vertical plane and between the fourth plane and the vertical plane, and the included angles are acute angles. By adopting the novel crystallizer, an air gap between a new green body shell and the crystallizer can be improved, so that the casting slab uniformly grows, and the purpose of reducing the crack occurrence rate is achieved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and more specifically relates to a crystallizer and a control method for solving cracks on the surface of peritectic steel continuous casting slabs. Background technique [0002] In the process of continuous casting of steel, the initial solidification area in the crystallizer is very important, because it is not only the growth point of the solidified slab shell, but also the breeding ground for various surface defects of the slab. For crack-sensitive peritectic steel continuous This is especially true for casting. Compared with other steel types, peritectic steel is more prone to defects such as surface cracks, segregation, and air gaps, especially sub-peritectic steel with a carbon content of 0.10% to 0.17%. At present, the mechanism of defects in peritectic steel is generally attributed to: the volume shrinkage caused by the peritectic phase transformation results in stress...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/04B22D11/18B22D11/16
CPCB22D11/0406B22D11/18B22D11/16
Inventor 张乔英乌力平刘国平程锁平杨克枝常正昇钟鹏郑晴
Owner MAANSHAN IRON & STEEL CO LTD