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Study of the Ni–Cr–Fe‐Based Alloy Casting Process using a Mold Simulator Technique
Author(s) -
Zhou Lejun,
Pan Zihang,
Wang Wanlin,
Chen Junyu
Publication year - 2020
Publication title -
steel research international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.603
H-Index - 49
eISSN - 1869-344X
pISSN - 1611-3683
DOI - 10.1002/srin.201900503
Subject(s) - mold , materials science , casting , alloy , metallurgy , heat flux , heat transfer , flux (metallurgy) , slag (welding) , composite material , infiltration (hvac) , continuous casting , thermodynamics , physics
To meet the balance between supply and demand, a Ni–Cr–Fe‐based alloy is tried to be casted using a lab‐scale continuous casting mold simulator. The results show that the temperature of mold wall increases from 73 °C (346 K) maximum to 117 °C (390 K) maximum, whereas the amplitudes of fluctuation of both temperature and heat flux generally reduces, from MF (original Mold Flux) to NF1 (New Mold Flux 1), and then to NF2 (New Mold Flux 2) mold fluxes during the casting process. Ti and Al transfer from molten alloy to mold flux cause the precipitation of high‐melting point CaTiO 3 and NaCaAl 3 (SiO 4 ) 3 in mold fluxes, which reduce the infiltration of slags in the gap. In addition, herein, all ten oscillation marks on the alloy shells maintain a strong one‐to‐one correlation with the heat flux cycles. The irregular oscillation marks together with the depression and entrapped slag on the shell mainly result from the uneven heat transfer and slag infiltration.