Solidification process simulation and process optimization of high strength steel slab

Zhang Pan; Shi Pengzhao; Xie Shizheng; Liang Liang; Xu Lijun; Wang Minglin

doi:10.7513/j.issn.1004-7638.2023.02.019

Volume 44 Issue 2

Apr. 2023

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Zhang Pan, Shi Pengzhao, Xie Shizheng, Liang Liang, Xu Lijun, Wang Minglin. Solidification process simulation and process optimization of high strength steel slab[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(2): 132-140. doi: 10.7513/j.issn.1004-7638.2023.02.019

Citation:

Zhang Pan, Shi Pengzhao, Xie Shizheng, Liang Liang, Xu Lijun, Wang Minglin. Solidification process simulation and process optimization of high strength steel slab[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(2): 132-140. doi: 10.7513/j.issn.1004-7638.2023.02.019

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Solidification process simulation and process optimization of high strength steel slab

doi: 10.7513/j.issn.1004-7638.2023.02.019

1.
National Research Center of Continuous Casting Technology, Central Iron and Steel Research Institute, Beijing 100081, China
2.
Technology Center, Hunan Valin Lianyuan Iron and Steel Co., Ltd., Loudi 417009, Hunan, China
3.
Material Digital R&D Center of China Iron & Steel Research Institute Group, Beijing 100081, China

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Received Date: 2022-05-23
Publish Date: 2023-04-30

Abstract

Abstract

Using solidification parameters and surface temperature measurements as boundary conditions, ProCAST software was applied to simulate the heat transfer and solidification process of 960QT steel slab during continuous casting. The effects of casting speed and superheat on the temperature fields of slab and liquid core length at the outlet of the copper mold were analyzed. It is concluded that under the conditions of the casting speed of 0.9 m/min and superheat of 23 ℃, the solidification end point is 18.43 m away from the meniscus. When the casting temperature is 1535 ℃, the position of solidification end moves forward about 2.7 m when the casting speed increases by 0.1 m/min. When the pulling speed is 0.9 m/min, the position of the solidification end moves back about 0.4 m with every 10 ℃ increase of superheat. In addition, the reduction position and amount of the soft reduction system were optimized, from 3 segments to 2 segments, and the reduction of sections 6 and 7 was changed to 2.0 and 2.5 mm respectively. After the process optimization, the central segregation and central porosity of slab were significantly improved, and the carbon segregation index at the slab center decreased from 1.85 to 1.09.
- continuous casting,
- 960QT,
- ProCAST,
- superheat,
- end of solidification,
- shell thickness,
- centerline segregation

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References(16)

References

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