Abstract
In this paper, the coupled mathematical model of thermal stress is established for initial shell of the groove mold and slab mold. The shape, temperature and stress field of initial shell are calculated. The results show that the wave crest and trough corresponding to the air gap of the groove are formed in the initial shell of the groove mold, and the difference between wave crest and trough decreases with the increase in the thickness of the initial shell, and the nonuniformity of the shell is lower than that of the flat mold, and the stress value of the initial shell is about 1/10 of the flat mold, and the distribution is uniform. The temperature of the shell surface of groove mold is higher than that of flat mold. Compared with flat mold, groove mold can reduce the surface stress of initial billet shell and improve the surface quality of billet.
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