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Thermodynamic analysis of the compositional control of inclusions in cutting-wire steel

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Abstract

Data from a thermodynamic database and the calculation software FactSage were used to investigate the phase diagrams of the MnO-CaO-SiO2-Al2O3 system in cutting-wire steel and the effects of oxide components on the low-melting-point (LMP) zone in the corresponding phase diagrams. Furthermore, the activities of oxide components in the quaternary system at an Al2O3 content of 25wt% were calculated. The contents of dissolved [Al] and [O] in liquid steel in equilibrium with LMP inclusions in the MnO-CaO-SiO2-Al2O3 system were optimized. The results show that the MnO-CaO-SiO2-Al2O3 system possesses the largest LMP zone (below 1400°C) at an Al2O3 content of 25wt% and that the CaO content should be simultaneously controlled in the range of 40wt% to 45wt%. The activities of the oxide components CaO, MnO, and SiO2 should be restricted in the ranges of 0 to 0.05, 0.01 to 0.6, and 0.001 to 0.8, respectively. To obtain LMP inclusions, the [Al] and [O] contents in cutting-wire steel must be controlled within the ranges of 0.5 × 10−6 to 1.0 × 10−5 and 3.0 × 10−6 to 5.0 × 10−5, respectively.

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Authors and Affiliations

  1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Jing Zhang & Fu-ming Wang

  2. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, China

    Jing Zhang & Fu-ming Wang

  3. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Chang-rong Li

Authors
  1. Jing Zhang
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  2. Fu-ming Wang
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  3. Chang-rong Li
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Correspondence to Fu-ming Wang.

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Zhang, J., Wang, Fm. & Li, Cr. Thermodynamic analysis of the compositional control of inclusions in cutting-wire steel. Int J Miner Metall Mater 21, 647–653 (2014). https://doi.org/10.1007/s12613-014-0953-2

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  • DOI: https://doi.org/10.1007/s12613-014-0953-2

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