Mathematical modeling of the steel ingot teeming and the solidification process

Gamanyuk, S. B.; Zyuban, N. A.; Rutskii, D. V.; Palatkin, S. V.

doi:10.1088/1757-899x/177/1/012064

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…Zhong [ 2 ] used the volume of fluid (VOF) multiphase model to study the effect of the bottom gas injection on the fluid flow during the bottom teeming process. Gamanyuk et al [ 28 ] developed a simple 2D mold to simulate the effect of the teeming rate on the solidification structure and internal defects of an ingot. The effect of the temperature distribution on the fluid flow was ignored.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation on the Fluid Flow, Air Entrainment, Heat Transfer, and Solidification during Top Pouring and Cooling of a 303 Ton Heavy Ingot

Wei

Zhou

Chen

et al. 2023

steel research int.

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Herein, a mathematical model combined with the k–ε turbulence model, volume of fluid multiphase model, and heat transfer and solidification model is established to investigate the steel–air two‐phase flow and solidification during the filling process of a 303 ton heavy steel ingot. The measured temperatures at different times are employed to validate the current mathematical model. The results show that the predicted results are in good agreement with the measured results. At the initial stage of the filling process, a double‐roll flow pattern is formed near the junction between the liquid surfaces due to the high speed of the jet flow. The maximum impinging depth of the jet flow is 1.8 m and the maximum splash height of the molten steel is 0.3 m. An empirical formula for the variation of the entrained air volume with time is proposed. The maximum growth rate in the horizontal direction is 0.08 mm s−1. In the vertical direction, the maximum growth rate of the solidified shell on the central axis is 0.12 mm s−1. The distribution of primary dendrite arm spacing and secondary dendrite arm spacing is obtained by combining the predicted cooling rate.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation on the Fluid Flow, Air Entrainment, Heat Transfer, and Solidification during Top Pouring and Cooling of a 303 Ton Heavy Ingot

Wei

Zhou

Chen

et al. 2023

steel research int.

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Mathematical Model Approach to the Solidification of Different Geometry Ingots and the Development of Shrinkage Defects in them

Rutsky

Zyuban

Gamanyuk

2019

MSF

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A mathematical modeling approach as well as experimental data analysis have made it possible to establish significant factors affecting the relative diameter of the axial porosity zone. The minimal values of this parameter determine if the ingot can be used for the fabrication of rolled steel rods over 300 mm in diameter, because chill extensive axial defects prevent from producing high quality bars of a large diameter. Commercial information analysis and experimental results have enabled to develop a model relating the axial porosity zone dimension, ingot geometry and process parameters of teeming 6.61 ton and 7.0 ton ingots. The improvement of the model obtained has enabled to establish that the axial porosity zone is primarily affected by the following factors: hot top size, slenderness ratio, the H/D ratio and insulation heat capacity. When these parameters are controlled to reduce the relative diameter of the axial porosity zone, the number of shrinkage defects decreases and the quality of large diameter rolled steel becomes better. The proposed ingot geometry improves the direction of the advance of the metal solidification front to the ingot thermal center, located in the hot top. Besides, the solidifying metal is better fed with the hot top melt.

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Mathematical modeling of the steel ingot teeming and the solidification process

Cited by 2 publications

References 3 publications

Numerical Simulation on the Fluid Flow, Air Entrainment, Heat Transfer, and Solidification during Top Pouring and Cooling of a 303 Ton Heavy Ingot

Numerical Simulation on the Fluid Flow, Air Entrainment, Heat Transfer, and Solidification during Top Pouring and Cooling of a 303 Ton Heavy Ingot

Mathematical Model Approach to the Solidification of Different Geometry Ingots and the Development of Shrinkage Defects in them

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