Dissolution of Ferrous Alloys into Molten Aluminium

DOI Web Site 3 Citations 18 References
  • Niinomi Mitsuo
    School of Production Systems Engineering, Toyohashi University of Technology
  • Ueda Yoshisada
    Department of Metallurgy, Faculty of Engineering, Nagoya University
  • Sano Masamichi
    Department of Iron and Steel Engineering, Faculty of Engineering, Nagoya University

Abstract

The controlling step of dissolution of ferrous alloys into molten aluminium was studied. Commercially pure iron, Fe–Si, Fe–Ni, Fe–Cu, Fe–Mn and Fe–C alloys were dipped into molten aluminium (99.8%Al) at 973, 1023 and 1073 K for various times. The rate of dissolution of each alloy into molten aluminium was examined theoretically from the viewpoint of natural convection mass transfer. For the dissolution of the Fe–Cr, Fe–Cu and Fe–Ni alloys at 973 K, the experimental value of the mass transfer coefficient kob is nearly equal to the theoretical value kc. Therefore, the dissolution of these alloys is controlled by the diffusion of Fe in molten aluminium. At 1023 and 1073 K, kob decreases with increasing dipping time. This is due to the increase of the resistance to the chemical reaction or mass transfer in the compoud layer. For the Fe–Si alloy, kob is a little larger than kc. The resistance to chemical reaction or mass transfer in the compoud layer is negligible. For the commercially pure iron, kob is smaller than kc by about 30–50%. The resistance to the chemical reaction or mass transfer in the compound layer is not negligible. For the Fe–Mn alloy, kob is smaller than kc by about 40–70%. The resistance to the chemical reaction or mass transfer in the alloy layer is not negligible. But, further study may be necessary for this alloy. For the Fe–C alloy, kob is much smaller than kc. The dissolution of this alloy is controlled by the chemical reaction or mass transfer in the compound layer.

Journal

Citations (3)*help

See more

References(18)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top