Next Article in Journal
Formation of Large Size Precipitate-Free Zones in β Annealing of the Near-β Ti-55531 Titanium Alloy
Next Article in Special Issue
Reoxidation of Al-Killed Steel by Cr2O3 from Tundish Cover Flux
Previous Article in Journal
Review on Advances in Metal Micro-Tube Forming
Previous Article in Special Issue
Thermodynamic and Experimental Studies on Al Addition of 253MA Steel
Open AccessArticle

Comparison of Transverse Uniform and Non-Uniform Secondary Cooling Strategies on Heat Transfer and Solidification Structure of Continuous-Casting Billet

1
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
2
Xiangtan Iron & Steel Co., Ltd of Hunan Valin., Xiangtan 411101, China
3
Jiangsu Boji Spraying Systems Co., Ltd., Yangzhou 225267, China
*
Author to whom correspondence should be addressed.
Metals 2019, 9(5), 543; https://doi.org/10.3390/met9050543
Received: 9 April 2019 / Revised: 7 May 2019 / Accepted: 8 May 2019 / Published: 10 May 2019
(This article belongs to the Special Issue Refining and Casting of Steel)
Water flux distribution largely influences the heat transfer and solidification of continuously-cast steel billets. In this paper, a secondary cooling strategy of transverse non-uniform water flux (i.e., higher flux density on billet center), was established and compared with the uniform cooling strategy using mathematical modeling. Specifically, a heat transfer model and a cellular automaton finite element coupling model were established to simulate the continuous casting of C80D steel billet. The water flux was measured using different nozzle configurations to assist the modeling. The mathematical results were validated by comparing the surface temperature and the solidification structure. It is shown that the non-uniform cooling strategy enables the increase of corner temperature and reduction in surface temperature difference, while a higher reheating rate is found on the surface center of the billet. Moreover, the non-uniform cooling strategy can enhance the cooling effect and refine the solidification structure. Accordingly, the liquid pool length is shortened, and the equiaxed crystal density is increased along with the decreased equiaxed crystal ratio. The uniform cooling strategy contributes to reducing internal cracks of billet, and the non-uniform one is beneficial for surface quality and central segregation. For C80D steel, the non-uniform cooling strategy outperforms the uniform one. View Full-Text
Keywords: numerical simulation; C80D steel; transverse water flux distribution; heat transfer; solidification structure numerical simulation; C80D steel; transverse water flux distribution; heat transfer; solidification structure
Show Figures

Figure 1

MDPI and ACS Style

Han, Y.; Wang, X.; Zhang, J.; Zeng, F.; Chen, J.; Guan, M.; Liu, Q. Comparison of Transverse Uniform and Non-Uniform Secondary Cooling Strategies on Heat Transfer and Solidification Structure of Continuous-Casting Billet. Metals 2019, 9, 543.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop