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Open AccessArticle

A New Method for Plasticization of Inclusions in Saw-Wire Steel by NaF Addition

School of Metallurgical Engineering, Anhui University of Technology, Ma’anshan 243002, China
Anhui Province Key Laboratory of Metallurgical Engineering & Resources Recycling, Ma’anshan 243002, China
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
Department of Materials Science & Engineering, University of Toronto, Toronto, ON M5S 3E4, Canada
Author to whom correspondence should be addressed.
Metals 2020, 10(6), 704;
Received: 6 May 2020 / Revised: 22 May 2020 / Accepted: 25 May 2020 / Published: 27 May 2020
In this study, a new method is proposed for the plasticization of inclusions by taking advantage of the behavior of alkali metals in lowering the inclusion melting point. A series of experiments with NaF additions to molten steel were carried out using a carbon tube furnace followed by simulated rolling tests using the solidified ingots and characterization of inclusions with the help of automated scanning electron microscopy. Compositional changes of the steel and evolution of gaseous species were evaluated using thermodynamic software FactSage 7.2 (ThermFact Inc., Montreal, QC, Canada). Based on this approach, NaF/steel/inclusion interactions and the effects of NaF addition on the melting point, size and deformability of inclusions were clarified. The modification of MnO-SiO2 inclusions by NaF also promoted the removal of inclusions and improved the cleanliness of steel. The results show that with the addition of NaF, the melting point of inclusions is greatly reduced, the deformability is improved, and the removal of inclusions is enhanced, all of which indicates a good prospect for industrial application. View Full-Text
Keywords: saw-wire steel; NaF addition; inclusion modification; deformability saw-wire steel; NaF addition; inclusion modification; deformability
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Chen, L.; Wan, Y.; Li, J.; Chen, W.; Yang, Y.; McLean, A. A New Method for Plasticization of Inclusions in Saw-Wire Steel by NaF Addition. Metals 2020, 10, 704.

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