抄録
Irregular growth of initially solidified shell in continuous casting is analyzed quantitatively, taking account of the shell deflection. Temperature, thermal stress, and shell deformation are calculated simultaneously in cross section of the initially solidifying shell. Shell irregularity obtained from this calculation is in agreement with the experimental results. This means the model can simulate the phenomena in the mould. Heat resistance at the interface between mould and metal is dominant only for a few seconds from meniscus. After that, heat resistance in the initially solidified shell becomes dominant. This means the careful control of initial solidification for a few seconds from meniscus is important to decrease the irregular shell growth. Calculated results shows that more even thermal resistance between mould and metal, higher speed casting and milder cooling rate will be preferable in decreasing the irregularity.
