TY - JOUR
T1 - Origin of heat transfer anomaly and solidifying shell deformation of peritectic steels in continuous casting
AU - Suzuki, Mikio
AU - Yu, Chong Hee
AU - Sato, Hidenori
AU - Tsui, Yuji
AU - Shibata, Hiroyuki
AU - Emi, Toshihiko
PY - 1996
Y1 - 1996
N2 - The effect of carbon content of steel melt on the heat transfer in a continuous casting mold was investigated in a laboratory scale mold by simultaneous measurements of the heat flux during solidification of the melt and shrinkage of the resulting shell during solidification and cooling. For peritectic medium carbon steels, the heat flux on the mold surface was subject to an anomalous decrease, since the surface roughness of the shell was substantial, providing an air gap at the shell/mold interface. For ultra low carbon steels, however, the heat flux was large in spite of the fact that surface roughness was also significant. For peritectic medium carbon steels, the deformation of the shell caused by the shrinkage due to δ/γ transformation during and just after solidification is responsible for the formation of the surface roughness, resulting in the heat transfer anomaly. On the contrary, the surface roughness for ultra low carbon steels is formed later on the shell after solidification during cooling, and hence it does not decrease the heat flux at the initial stage of solidification.
AB - The effect of carbon content of steel melt on the heat transfer in a continuous casting mold was investigated in a laboratory scale mold by simultaneous measurements of the heat flux during solidification of the melt and shrinkage of the resulting shell during solidification and cooling. For peritectic medium carbon steels, the heat flux on the mold surface was subject to an anomalous decrease, since the surface roughness of the shell was substantial, providing an air gap at the shell/mold interface. For ultra low carbon steels, however, the heat flux was large in spite of the fact that surface roughness was also significant. For peritectic medium carbon steels, the deformation of the shell caused by the shrinkage due to δ/γ transformation during and just after solidification is responsible for the formation of the surface roughness, resulting in the heat transfer anomaly. On the contrary, the surface roughness for ultra low carbon steels is formed later on the shell after solidification during cooling, and hence it does not decrease the heat flux at the initial stage of solidification.
KW - Continuous casting
KW - Heat flux
KW - Interfacial thermal resistance
KW - Peritectic medium carbon steel
KW - Shell deformation
KW - Shrinkage
KW - Surface roughness
KW - δ/γ transformation
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U2 - 10.2355/isijinternational.36.suppl_s171
DO - 10.2355/isijinternational.36.suppl_s171
M3 - Article
AN - SCOPUS:4243517357
VL - 36
SP - S171-S174
JO - Transactions of the Iron and Steel Institute of Japan
JF - Transactions of the Iron and Steel Institute of Japan
SN - 0915-1559
IS - SUPPL.
ER -