Numerical Simulation of Void Closure in the Core of Continuous Casting Steel During Temperature Gradient Rolling Process

doi:10.12068/j.issn.1005-3026.2021.07.005

Abstract

Abstract: Based on the high permeability temperature gradient rolling technology by temperature-deformation coupling control， the effects of the intensive water cooling before rolling and rolling reduction ratio on void closure in the core of the bloom were studied by numerical simulation using DEFORM software. The results show that temperature gradient greatly affects the deformation flow of the bloom. Increasing the water-cooling time increases the temperature difference between the core and the surface of the continuous casting steel， which leads to a larger temperature gradient， so that the deformation permeability of rolling can be enhanced effectively. Moreover， an increasing reduction ratio of the single-pass rolling combined with the temperature gradient can further increase the deformation flow in the core of the bloom， which promotes the void closure， so that the quality of the continuous casting steel can be greatly improved.

Key words: high strength steel; temperature gradient rolling; reduction ratio; void closure; numerical simulation

CLC Number:

TG335.11

WANG Bin， NING Xin-yu， LI Fang-po， LI Hai-jun. Numerical Simulation of Void Closure in the Core of Continuous Casting Steel During Temperature Gradient Rolling Process[J]. Journal of Northeastern University(Natural Science), 2021, 42(7): 939-946.

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