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Continuous casting method of sub-peritectic steel slab

A steel billet, peritectic technology, applied in the field of continuous steel casting, can solve the problem of not being able to cover the relatively large shrinkage area of ​​peritectic steel

Active Publication Date: 2020-01-17
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The upper area is the area near the meniscus, and the area with relatively large shrinkage in the continuous casting process of subperitectic steel is within the upper 150-400mm area of ​​the mold. Only by the method mentioned in the "CN 108393445 A" invention patent, it is basically Unable to cover the relatively large shrinkage area of ​​peritectic steel

Method used

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  • Continuous casting method of sub-peritectic steel slab

Examples

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Comparison scheme
Effect test

Embodiment 1

[0027] In the continuous casting method of the hypoperitectic steel slab provided in this embodiment, in the process of casting the hypoperitectic steel slab, in the crystallizer cooling, the wide-face crystallizer adopts a three-stage water cooling method; the three-stage water cooling includes the first stage Water cooling 1, the second water cooling 2 and the third water cooling 3, the water flow rates of the first water cooling 1, the second water cooling 2 and the third water cooling 3 are 8.0m / s, 9.5m / s and 11.0m / s respectively m / s.

[0028] In terms of weight percentage, in the steel chemical composition of the hypoperitectic steel slab, the carbon content is 0.09%.

[0029] The width of the casting section of the hypoperitectic steel slab is 1700 mm, and the thickness of the casting section is 230 mm.

[0030] During the casting process of the hypoperitectic steel slab, the temperature of the water entering the crystallizer is 32°C.

[0031] During the casting proces...

Embodiment 2

[0037] In the continuous casting method of the hypoperitectic steel slab provided in this embodiment, in the process of casting the hypoperitectic steel slab, in the crystallizer cooling, the wide-face crystallizer adopts a three-stage water cooling method; the three-stage water cooling includes the first stage Water cooling 1, the second water cooling 2 and the third water cooling 3, the water flow rates of the first water cooling 1, the second water cooling 2 and the third water cooling 3 are 7.5m / s, 9.0m / s and 12.0m / s respectively m / s.

[0038] In terms of weight percentage, in the steel chemical composition of the hypoperitectic steel slab, the carbon content is 0.12%.

[0039] The width of the casting section of the hypoperitectic steel slab is 2000 mm, and the thickness of the casting section is 250 mm.

[0040] During the casting process of the hypoperitectic steel slab, the temperature of the water entering the crystallizer is 30°C.

[0041] During the casting proces...

Embodiment 3

[0047] In the continuous casting method of the hypoperitectic steel slab provided in this embodiment, in the process of casting the hypoperitectic steel slab, in the crystallizer cooling, the wide-face crystallizer adopts a three-stage water cooling method; the three-stage water cooling includes the first stage Water cooling 1, the second water cooling 2 and the third water cooling 3, the water flow rates of the first water cooling 1, the second water cooling 2 and the third water cooling 3 are 7.0m / s, 8.5m / s and 12.0m / s respectively m / s.

[0048] In terms of weight percentage, in the steel chemical composition of the hypoperitectic steel slab, the carbon content is 0.14%.

[0049] The width of the casting section of the hypoperitectic steel slab is 1400 mm, and the thickness of the casting section is 230 mm.

[0050] During the casting process of the hypoperitectic steel slab, the temperature of the water entering the crystallizer is 30°C.

[0051] During the casting proces...

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Abstract

The invention relates to a continuous casting method of a sub-peritectic steel slab, and belongs to the field of continuous casting steel. According to the continuous casting method, n the process ofcasting the sub-peritectic steel slab, a crystallizer adopts a three-section type water cooling mode, the three-section water cooling comprises a first section of water cooling, a second section of water cooling and a third section of water cooling, wherein the water flow rates of the first section of water cooling, the second section of water cooling and the third section of water cooling are respectively 6.0-9.0 m / s, 7.5-10.5 m / s, and 8.5-13.0 m / s.

Description

technical field [0001] The invention belongs to the field of continuous steel casting, and in particular relates to a continuous casting method for a hypoperitectic steel slab. Background technique [0002] With the development of continuous casting technology, slab continuous casting production lines continue to develop high-quality steel grades. When slab continuous casting produces sub-peritectic steel grades, peritectic reaction occurs in the crystallizer, and the shrinkage of the billet shell during the solidification process is large, resulting in uneven heat flow distribution in the crystallizer, resulting in serious uneven thickness of the billet shell, and the primary The high-temperature strength of the slab shell is low, and it is easy to produce slab cracks and even breakouts. [0003] In order to solve the problem of cracks in cast sub-peritectic steel, some enterprises adopt the weak cooling technology of the mold to reduce the heat flow in the meniscus area o...

Claims

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Application Information

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IPC IPC(8): B22D11/055B22D11/059B22D11/18B22D11/22
CPCB22D11/055B22D11/059B22D11/18B22D11/22
Inventor 李海波刘国梁朱国森季晨曦陈斌朱志远邓小旋唐德池吕迺冰尹娜刘珂潘宏伟马文俊
Owner SHOUGANG CORPORATION