Analysis on bulging strain of continuous casting slab during solidification

He Yumin; Luo Yang; He Bo

doi:10.7513/j.issn.1004-7638.2024.02.018

Volume 45 Issue 2

Feb. 2024

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He Yumin, Luo Yang, He Bo. Analysis on bulging strain of continuous casting slab during solidification[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(2): 125-131, 161. doi: 10.7513/j.issn.1004-7638.2024.02.018

Citation:

He Yumin, Luo Yang, He Bo. Analysis on bulging strain of continuous casting slab during solidification[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(2): 125-131, 161. doi: 10.7513/j.issn.1004-7638.2024.02.018

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Analysis on bulging strain of continuous casting slab during solidification

doi: 10.7513/j.issn.1004-7638.2024.02.018

He Yumin^{1
,
,},
Luo Yang^1
,,
He Bo²

1.
School of Mechanical and Electrical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China
2.
China Heavy Machinery Research Institute Co., Ltd., Xi’an 710018, Shaanxi, China

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Received Date: 2023-01-11
Available Online: 2024-04-30
Publish Date: 2024-04-30

Abstract

Abstract

In view of the bulging deformation of slab during continuous casting, in order to eliminate fluctuation of the mold liquid level by means of reducing bulging strain at the boundary of two phases of the casting stream, considering influence of contact arc length between roller and casting stream on the bulging strain, the relationship between contact arc length and the bulging strain is derived, and the analytical solution of contact arc length on the bulging strain is obtained. The relationship between the contact arc length and the bulge strain is deduced to quantify its influence on the bulge strain. Firstly, the heat transfer model of slab continuous casting and solidification is established to obtain the growth of slab shell during slab cooling. Secondly, an improved three-dimensional bulge finite element model is established to calculate the bulge deformation and bulge strain during slab solidification according to the actual equipment and process conditions of the continuous caster. Finally, based on the simulation results, the bulging deformation state of the shell and the strain law of the shell at the two-phase boundary are obtained. The results show that when roll diameter increases by 50 mm, the bulge strain at the same position will be decreased by about 0.005%. Therefore, increasing roll diameter can effectively increase contact arc length of the roller and then reduce the bulge strain. In section 0, the roll diameter of 250 mm should be selected to minimize the bulge strain.
- continuous casting,
- slab,
- bulging strain,
- roller,
- contact arc length,
- simulation calculation,
- creep,
- temperature field

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References(24)

References

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