| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method which can simply and accurately detect a solidification completion position of a casting slab without involving cost increase in equipment and which further allows a casting capacity in a continuous casting machine to be improved to become maximum. <P>SOLUTION: Continuous casting for casting a casting slab is performed such that the casting slab S continuously extracted from a continuous casting mold 1 is supported by a roll segment 6 in which a plurality of pairs of support rolls 5 are integrated and an upper frame 6a and a lower frame 6b are mutually connected through a tie rod 6c. In the continuous casting, during the casting slab S is extracted to be moved, displacement quantity of the upper frame 6a for at least one of an inlet side and an outlet side of the roll segment 6 is measured, and when amplitude of the measured displacement quantity is 0.1 mm or more, the solid phase ratio in an axis of the casting slab S at the inlet side or the outlets side of the roll segment 6 is determined to be at least the solid phase ratio at the limit of fluidization. Then, based on the determination result, a solidification completion position of the casting slab S is detected, so that the roll segment 6 in the solidification completion position is specified. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
