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Effect of Al2O3/Na2O ratio and MnO on high-temperature properties of mold flux for casting peritectic steel

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Abstract

The influences of Al2O3/Na2O ratio and MnO content on high-temperature properties, such as melting, crystallization, heat transfer, and viscosity of mold flux for casting peritectic steel, have been investigated. The results show that the melting temperatures of mold flux decrease, whereas the ratio of crystalline layers increases with the decrease in Al2O3/Na2O ratio and increase in MnO content. The average response temperatures of the three mold fluxes decrease from 566, 525, to 512 °C, respectively, which indicates that the heat transfer controlling ability of mold flux is promoted due to the increase in crystallization ability and addition of transition metal oxide MnO. Furthermore, the viscosity–temperature curves suggest that the viscosity at 1300 °C decreases, but the break temperature increases with the reduction in Al2O3/Na2O and addition of MnO.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51874363 and U1760202), Natural Science Foundation of Hunan Province (Grant No. 2019JJ40345), and Hunan Scientific Technology Projects (Grant Nos. 2020WK2003 and 2019RS3007).

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Authors and Affiliations

  1. School of Metallurgy and Environment, Central South University, Changsha, 410083, Hunan, China

    Le-jun Zhou, Hao Luo, Wan-lin Wang, Xiong Yan & Hou-fa Wu

  2. National Center for International Cooperation of Clean Metallurgy, Changsha, 410083, Hunan, China

    Le-jun Zhou, Hao Luo, Wan-lin Wang, Xiong Yan & Hou-fa Wu

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  1. Le-jun Zhou
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  2. Hao Luo
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  3. Wan-lin Wang
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Correspondence to Wan-lin Wang.

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Zhou, Lj., Luo, H., Wang, Wl. et al. Effect of Al2O3/Na2O ratio and MnO on high-temperature properties of mold flux for casting peritectic steel. J. Iron Steel Res. Int. 29, 53–60 (2022). https://doi.org/10.1007/s42243-021-00712-0

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  • DOI: https://doi.org/10.1007/s42243-021-00712-0

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