Solidification completion position of continuous casting slab detection method and a control method .

摘要

PROBLEM TO BE SOLVED: To exactly detect the solidification completion position of a continuous cast piece by a simple method while suppressing equipment costs.;SOLUTION: When continuously casting molten steel by continuously drawing out a cast piece while supporting the cast piece by using a roll segment 15 which is embedded with a plurality of pairs of cast piece support rolls 7, and has four tie rods 17 for connecting an upper frame 16' and a lower frame 16, an amount of the warpage of a disc spring 19 which is attached to the four tie rods for connecting the upper frame and the lower frame of the roll segment and prevents an excess load is measured in a state that an under-pressure gradient of the roll segment is set not smaller than 0.3 mm/m, and when the measured amount of the warpage of the disc spring reaches 0.3 mm or larger, a vibration stroke of the warpage is not smaller than 0.05 mm, and a vibration cycle is within ±10% of an integer multiple of a ratio (R/Vc) between a roll pitch R (mm) of the cast piece support roll and a cast piece draw-out speed Vc (mm/min), it is determined that the solidification of the cast piece is completed in a region of the roll segment.;COPYRIGHT: (C)2012,JPO&INPIT