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Study on Adjustment and Optimization of LF Refining Slag of Spring Steel 55SiCrA

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Proceedings of the 3rd Pan American Materials Congress

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

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Abstract

The spring steel 55SiCrA produced in a domestic steel factory is deoxidized by Si with “100 t EAF-LF-VD-CC”. The fluoric content (CaF2 = 17.41–22.15%) and the binary basicity (R = 1.9–3.0) of applied LF refining slag are high. To avoid environmental pollution caused by fluorine, meanwhile guarantee the speed of melting slag and smelting effect on molten steel, the structure of refining slag was adjusted. A new fluorine-free slag system was obtained by changing slagging process, adjusting adding amounts of slag-making materials, such as lime, calcium carbide, silicon carbide and so on. This new fluorine-free slag was applied in industrial tests. The results showed that this new fluorine-free slag could meet smelting demands well. The average mass fraction of oxygen content of spring steel 55SiCrA billets could decreased from 11 × 10−6 to 9 × 10−6 and the plasticity of inclusions also changed better. All compositions of observed inclusion in billets were within the 1400 °C liquidus in Al2O3-SiO2-CaO-MgO-MnO phase diagram.

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Acknowledgements

This research was supported financially by the National Natural Science Foundation of China (No. 51404022) and State Key Laboratory of Advanced Metallurgy Foundation (No. 41614014).

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Authors and Affiliations

  1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Bei**g, Bei**g, 100083, China

    Chao Gu, Yan-** Bao, Lu Lin, Min Wang, Li-hua Zhao & Zi-xuan Wu

Authors
  1. Chao Gu
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  2. Yan-** Bao
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  3. Lu Lin
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  4. Min Wang
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  5. Li-hua Zhao
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  6. Zi-xuan Wu
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Corresponding author

Correspondence to Yan-** Bao .

Editor information

Editors and Affiliations

  1. Dept. of Nanoengineering, MC 0448, University of California-San Diego Dept. of Nanoengineering, MC 0448, LA JOLLA, California, USA

    Marc André Meyers

  2. ESFM-IPN , Mexico City, Mexico

    Hector Alfredo Calderon Benavides

  3. UTN-National University of Technology , Buenos Aires, Argentina

    Sonia P Brühl

  4. Universidad de Antioquia , Medellín, Colombia

    Henry A Colorado

  5. Pratt & Whitney Canada , Longueuil, Canada

    Elvi Dalgaard

  6. Military Institute of Engineering , Rio de Janerio, Brazil

    Carlos Nelson Elias

  7. Universidade Federal de Minas Gerais , Belo Horizonte, Brazil

    Roberto B Figueiredo

  8. Ternium Mexico , Nuevo León, Mexico

    Omar Garcia-Rincon

  9. Division of Materials Sci & Engg, Hanyang University Division of Materials Sci & Engg, Seoul, Korea (Republic of)

    Megumi Kawasaki

  10. Dept. Engineering & the Environment, University of Southampton Dept. Engineering & the Environment, Southampton, United Kingdom

    Terence G. Langdon

  11. University of Concepción , Concepción, Chile

    R.V. Mangalaraja

  12. Universidad Nacional de Ingeniería , Lima, Peru

    Mery Cecilia Gomez Marroquin

  13. Federal University of Rio de Janeiro , Rio de Janeiro, Brazil

    Adriana da Cunha Rocha

  14. Dept Chemical Engg & Sci, University of California, Irvine Dept Chemical Engg & Sci, Irvine, California, USA

    Julie M Schoenung

  15. Universidade Federal Fluminense , Niterói, Brazil

    Andre Costa e Silva

  16. Mechanical Engineering, University of Waterloo Mechanical Engineering, WATERLOO, Ontario, Canada

    Mary Wells

  17. ETH Zurich , Zürich, Switzerland

    Wen Yang

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Gu, C., Bao, Yp., Lin, L., Wang, M., Zhao, Lh., Wu, Zx. (2017). Study on Adjustment and Optimization of LF Refining Slag of Spring Steel 55SiCrA. In: Meyers, M., et al. Proceedings of the 3rd Pan American Materials Congress. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-52132-9_77

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