MOLD FOR CONTINUOUS CASTING OF STEEL

摘要

PURPOSE:To prevent the generation of crack defects at the time of continuous casting and hot rolling by providing cooling medium blowing nozzles and temp. measuring sensors to the lower inside wall surface of a casting mold and disposing cooling medium sucking conduit holes to the inside wall surface upper than said wall surface. CONSTITUTION:The temp. measuring sensors 3 for measuring the surface layer temp. of an ingot and the cooling medium blowing nozzle holes 4 are disposed to the lower inside wall surface 2 of the casting mold 1. The cooling medium sucking conduit holes 6 are installed to the position upper than the lower inside wall surface 2. The temp. in the surface layer part of the ingot transferring at the lower inside wall surface 2 is measured by the sensors 3 according to the above-mentioned mechanism. The surface layer part of the ingot is cooled at a prescribed cooling rate after the existence of the measured temp. within the adequate range of the austenite single phase formation temp. Tgamma or above is confirmed. The generation of the crack flaws during the continuous casting and hot working is, therefore, prevented by the above-mentioned method.