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Secondary cooling control method, system and device for boron-containing steel continuous casting billet and storage medium

A control method and continuous casting billet technology, applied in the field of slab continuous casting, can solve problems such as quality defects at the edge of the continuous casting billet

Active Publication Date: 2021-06-25
SHOUGANG CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a secondary cooling control method, system, equipment and storage medium for boron-containing steel continuous casting slabs, so as to solve or partly solve the problem that the addition of boron may easily cause the edge of the continuous casting slab in the continuous casting process of boron-containing steel. technical problems of quality defects

Method used

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  • Secondary cooling control method, system and device for boron-containing steel continuous casting billet and storage medium
  • Secondary cooling control method, system and device for boron-containing steel continuous casting billet and storage medium
  • Secondary cooling control method, system and device for boron-containing steel continuous casting billet and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] S690Q steel slabs with 250mm*2000mm continuous casting slabs are produced on a continuous casting machine in a steel factory. The surface temperature of the outer arc of the first section of the slab is 1150°C, and the cooling specific water volume is 0.6L / kg; the second section is cast The surface temperature of the inner arc of the slab is controlled at 1030°C, and the specific cooling water volume is 0.38L / kg; the surface temperature of the inner arc of the billet in the third section is controlled at 825°C, and the specific cooling water volume is 0.7L / kg.

Embodiment 2

[0062] Production of S235-B steel slabs with a continuous casting slab size of 300mm*1800mm, the surface temperature of the outer arc of the first section of the slab is 1100°C, and the specific cooling water is 0.65L / kg; the surface temperature of the inner arc of the second section is The control is 1000°C, and the specific cooling water volume is 0.4L / kg; the inner arc surface temperature of the billet in the third section is controlled at 820°C, and the specific cooling water volume is 0.75L / kg.

Embodiment 3

[0064] For the production of Q690MD steel slabs with a continuous casting slab size of 400mm*2000mm, the surface temperature of the outer arc of the first section of the slab is 1060°C, and the specific cooling water is 0.7L / kg; the surface temperature of the inner arc of the second section is controlled at 960°C, the specific cooling water volume is 0.45L / kg; the surface temperature of the inner arc of the billet in the third section is controlled at 810°C, and the specific cooling water volume is 0.95L / kg.

[0065] Three comparative examples were designed for comparison, and the corresponding implementation data are as follows:

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Abstract

The invention discloses a secondary cooling control method for a boron-containing steel continuous casting billet. The secondary cooling control method comprises the steps that in a first section of a continuous casting secondary cooling process section, the target temperature of the outer arc surface of the boron-containing steel continuous casting billet is controlled to 1050-1150 DEG C; in the second section of the continuous casting secondary cooling process section, the target temperature of the inner arc surface of the boron-containing steel continuous casting billet is controlled to 950-1049 DEG C; and in the third section of the continuous casting secondary cooling process section, the target temperature of the inner arc surface of the boron-containing steel continuous casting billet is controlled to 800-830 DEG C. Through the combination of the means, the surface quality of the boron-containing steel continuous casting billet can be remarkably improved, the occurrence rate of cracks of the casting billet is decreased, and the secondary cooling control method is suitable for continuous casting process control of boron-containing steel.

Description

technical field [0001] The present application relates to the technical field of slab continuous casting, in particular to a method, system, equipment and storage medium for secondary cooling control of boron-containing steel continuous casting slabs. Background technique [0002] Boron is a semiconducting nonmetal with an atomic number of 5 and an atomic weight of 12. Although the solid solubility of boron in steel is very small, the addition of boron has a great effect on the phase transformation and hardening of steel. Adding boron to low-alloy high-strength steel can effectively improve the strength and toughness of low-alloy high-strength steel; adding boron to steel can also greatly improve the hardenability of steel. Generally speaking, steels with a boron content > 0.001% in steel can be called boron-containing steels. [0003] Although the addition of boron has a good effect on the mechanical properties of boron-containing steel, on the other hand it will also ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/22
CPCB22D11/225
Inventor 刘洋赵新宇赵晶王臻明田志伟朱志远王玉龙王海宝吕延春胡显堂蒯多圣谢翠红
Owner SHOUGANG CORPORATION
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