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Model of calculating activity of nitrogen and vanadium in Fe-C-V-N molten metal

  • Jun Peng
  • Shi-jun Wang
  • Yuan-chi Dong
  • Li-xia Liu
  • Yun Zhou
  • Er-bao Chen
Article

Abstract

The solubility of nitrogen in the Fe-C-V-N system was measured at 1 708 K and the model of calculating activity (action concentration) of nitrogen (N) and vanadium (V) was derived according to the phase diagram and the coexistence theory of the metal melt structure. The solubility expression of nitrogen in the Fe-C-V-N system at 1 708 K was wN=0.058 194 − 0.010 367wC + 0.005 543 4wV. Comparing the computing results with the experimental results, a satisfactory conclusion could be obtained. The analysis of the Fe-C-V-N system using this model showed that VN was present in a high temperature metal melt, which would reduce the action concentration of nitrogen obviously. It was consequently disadvantageous to the removal of nitrogen from hot metal.

Key words

metal melt coexistence theory action concentration activity 

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References

  1. 1.
    Simmons J W. Overview; High-Nitrogen Alloying of Stainless Steels [J]. Materials Science and Engineering, 1996, 207A (2): 159.CrossRefGoogle Scholar
  2. 2.
    HUANG Xi-hu. Principle of Ironmaking and Steelmaking [M]. Beijing: Metallurgical Industry Press, 2002 (in Chinese).Google Scholar
  3. 3.
    Massalski T B. Binary Alloy Phase Diagrams [M]. USA: NSRDS, 1986.Google Scholar
  4. 4.
    ZHANG Jian, CHENG Guo-guang. Calculating Thermodynamics of Metallurgic Melt [M]. Beijing; Metallurgical Industry Press, 1998 (in Chinese).Google Scholar
  5. 5.
    YE Da-lun. Practical Manual Book of Inorganic Matter Thermodynamics [M]. Beijing: Metallurgical Industry Press, 1981 (in Chinese).Google Scholar
  6. 6.
    ZHU Rong, ZHANG Jian. Calculation Model of Mass Action Concentrations for Fe-C-O Metallic Melts [J]. Journal of University of Science and Technology Beijing, 1996, 18(5): 141 (in Chinese).Google Scholar
  7. 7.
    CHENG Guo-guang, ZHANG Jian. Calculation of Mass Action Concentration for Oxides Saturated in Slag Melts [J], Journal of University of Science and Technology Beijing, 1994, 16(1): 10.Google Scholar

Copyright information

© China Iron and Steel Research Institute Group 2008

Authors and Affiliations

  • Jun Peng
    • 1
    • 2
  • Shi-jun Wang
    • 1
  • Yuan-chi Dong
    • 1
  • Li-xia Liu
    • 1
  • Yun Zhou
    • 1
  • Er-bao Chen
    • 1
  1. 1.School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.School of Metallurgy and ResourceAnhui University of TechnologyMa’anshan, AnhuiChina

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