| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing continuously cast slabs, by which the shape of the cast slab in the direction of its width at a finish position of solidification is controlled so as to coincide with a target shape by detecting the shape of the continuously cast slab in the direction of its width at the finish position of solidification. SOLUTION: An apparatus for manufacturing continuously cast slabs comprises transverse ultrasonic wave sensors 6, 8, longitudinal ultrasonic sensors 7, 9 arranged at the same positions as the positions of the transverse ultrasonic wave sensors or at the same positions as the positions in the direction of the width of the cast slab separated in the direction of the casting, and a section for calculating the finish position 4 of solidification by using an arithmetical expression based on the received signals of the ultrasonic sensors. When the coincidence of the arranged positions of the transverse ultrasonic wave sensors and the finish position of solidification of the cast slab has been confirmed by the variation of the intensity of the received signals of the transverse ultrasonic wave sensors, the flow of the molten steel in the casting mold is adjusted or the width limitation of the secondary cooling is adjusted such that the difference between the shortest portion and the longest portion of the finish position of solidification is within the reference range by detecting the finish position of solidification of the cast slab by using an apparatus for detecting the finish position of solidification, wherein the arithmetical expression is calibrated such that the finish position of solidification calculated by the arithmetical expression coincides with the arranged positions of the transverse ultrasonic wave sensors. COPYRIGHT: (C)2006,JPO&NCIPI
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