Continuous Casting Process Optimization of High-strength Steel 700L Thin Slab

Hou Mingshan; Zhou Chaogang; Ai Liqun; Li Mengying; Zhang Yao; Wei Shenghui; Dong Jiliang; Lu Boxun; Li Zhonghua

doi:10.7513/j.issn.1004-7638.2018.04.025

Volume 39 Issue 4

Aug. 2018

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Hou Mingshan, Zhou Chaogang, Ai Liqun, Li Mengying, Zhang Yao, Wei Shenghui, Dong Jiliang, Lu Boxun, Li Zhonghua. Continuous Casting Process Optimization of High-strength Steel 700L Thin Slab[J]. IRON STEEL VANADIUM TITANIUM, 2018, 39(4): 146-151. doi: 10.7513/j.issn.1004-7638.2018.04.025

Citation:

Hou Mingshan, Zhou Chaogang, Ai Liqun, Li Mengying, Zhang Yao, Wei Shenghui, Dong Jiliang, Lu Boxun, Li Zhonghua. Continuous Casting Process Optimization of High-strength Steel 700L Thin Slab[J]. IRON STEEL VANADIUM TITANIUM, 2018, 39(4): 146-151. doi: 10.7513/j.issn.1004-7638.2018.04.025

Citation:

Hou Mingshan, Zhou Chaogang, Ai Liqun, Li Mengying, Zhang Yao, Wei Shenghui, Dong Jiliang, Lu Boxun, Li Zhonghua. Continuous Casting Process Optimization of High-strength Steel 700L Thin Slab[J]. IRON STEEL VANADIUM TITANIUM, 2018, 39(4): 146-151. doi: 10.7513/j.issn.1004-7638.2018.04.025

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Continuous Casting Process Optimization of High-strength Steel 700L Thin Slab

doi: 10.7513/j.issn.1004-7638.2018.04.025

1. Technology Center of HBIS Group Tangshan Company, Tangshan 063000, Hebei, China;
2. College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, Hebei, China;
3. Tangshan Key Laboratory of Special Metallurgy and Materials Manufacturing, Tangshan 063009, Hebei, China

Received Date: 2017-09-26
Available Online: 2023-12-02
Publish Date: 2018-08-31

Abstract

Abstract

In order to solve the quality problems of 700 L thin slab during Tangshan iron and steel company FTSC continuous casting,force situation of solidification shell in funnel-typed mold and FTSC（ Flexible Thin Slab Casting） spray of secondary cooling was analyzed for thin slab continuous casting,at the same time,according to the characteristics of steel,the causes of surface cracks and internal cracks of 700 L steel was analyzed in this paper.The mould taper,mould water,tundish superheat,mould powder,secondary cooling water etc processes were optimized based on the above analysis results.The results showed that surface cracks and billet internal crack of continuous casting high strength steel thin slab were effectively solved by increasing the opening taper,reducing mould water quantity,reducing tundish superheat,adjusting the viscosity and basicity of mould powder,reducing fountain volume of secondary cooling water. Through the process optimization,heat phase diagram is stabilized,surface and internal quality of thin slab are improved.
- continuous casting,
- thin slab,
- 700L,
- surface crack,
- internal crack