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Article

Structure of Solidified Films of CaO-SiO2-Na2O Based Low-Fluorine Mold Flux

1
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
2
School of Materials and Metallurgical Engineering, Guizhou Institute of Technology, No.1 Caiguan Road, Guiyang 550003, China
3
Key Laboratory of Light Metal Materials Processing Technology of Guizhou Province, Guizhou Institute of Technology, Guiyang 550003, China
*
Author to whom correspondence should be addressed.
Metals 2019, 9(1), 93; https://doi.org/10.3390/met9010093
Received: 4 December 2018 / Revised: 8 January 2019 / Accepted: 11 January 2019 / Published: 16 January 2019
(This article belongs to the Special Issue Ironmaking and Steelmaking)
As an essential synthetic material used in the continuous casting of steels, mold fluxes improve the surface quality of steel slabs. In this study, a CaO-SiO2-Na2O-based low-fluorine mold flux was solidified by an improved water-cooled copper probe with different temperatures of molten flux and different probe immersion times. The heat flux through solid films and the film structures were calculated and inspected, respectively. Internal cracks (formed in the glassy layer of films during solidification) were observed. The formation and evolution of those cracks contributed to the unstable heat flux density. The roughness of the surface in contact with the water-cooled copper probe formed as films were still glassy and the roughness had no causal relationship with crystallization or devitrification. Combeite with columnar and faceted dendritic shapes were the main crystal in the film. View Full-Text
Keywords: mold flux; low fluorine; internal crack; surface roughness; slag film mold flux; low fluorine; internal crack; surface roughness; slag film
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MDPI and ACS Style

Zeng, J.; Long, X.; You, X.; Li, M.; Wang, Q.; He, S. Structure of Solidified Films of CaO-SiO2-Na2O Based Low-Fluorine Mold Flux. Metals 2019, 9, 93. https://doi.org/10.3390/met9010093

AMA Style

Zeng J, Long X, You X, Li M, Wang Q, He S. Structure of Solidified Films of CaO-SiO2-Na2O Based Low-Fluorine Mold Flux. Metals. 2019; 9(1):93. https://doi.org/10.3390/met9010093

Chicago/Turabian Style

Zeng, Jianhua, Xiao Long, Xinchen You, Min Li, Qiangqiang Wang, and Shengping He. 2019. "Structure of Solidified Films of CaO-SiO2-Na2O Based Low-Fluorine Mold Flux" Metals 9, no. 1: 93. https://doi.org/10.3390/met9010093

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