CONTINUOUS CASTING MACHINE AND METHOD FOR ESTIMATING GENERATION OF LONGITUDINAL CRACK OF CAST SLAB SURFACE

摘要

PROBLEM TO BE SOLVED: To provide a continuous casting machine capable of detecting temperature dip more accurately with a simple configuration and accordingly estimating accurate generation of a longitudinal crack, and also to provide a method for estimating generation of a longitudinal crack of a cast slab surface.;SOLUTION: A temperature dip indexation part 25a respectively calculates total values of variation amounts ΔT_i respectively calculated at periods when the variation amounts ΔT_i respectively detected with temperature sensors 21 and 22 continuously indicate a negative value as a temperature dip index K. An upper and lower index multiplication part 25b calculates a multiplication index M by multiplying a temperature dip index K that the temperature dip indexation part 25a calculates about the temperature sensor 21 by a temperature dip index K that the temperature dip indexation part 25a calculates about the temperature sensor 22. A determination part 25c for the generation of the longitudinal crack determines whether a depression is generated on a surface of a cast slab 17 based on the multiplication index M.;COPYRIGHT: (C)2011,JPO&INPIT