METHOD AND APPARATUS FOR GUIDING CONTINUOUS CASTING SLAB

PURPOSE:To eliminate the shifting of concentrated non-solidifying steel and to obtain a slab having good quality by making temp. at the part between the end part of non-solidification and a mold surface to the specific time- temperature relation in the continuous casting slab carried as holding alternately by two sets of the upper and lower uniform pressure walking bars. CONSTITUTION:One set of an outer bar 12 and inner bar 15 at an upper and lower place is worked as holding by pushing of outside bearings 8a, 8b and inside bearing 8c, 8d alternately, based on an action of a link 11a for the outer bar rolling reduction and a link 14a for the inner bar rolling reduction by hydraulic pressure of an eccentric sleeve 9 of a chucking shaft 7. Then, the temp. at the part between the end part of non-solidification of the continuous casting slab 2 and the mold surface is lowered ans held at 600-900 deg.C for about 1-7 min by an instantaneous cooling device 5 and rolling reduction force per unit area of each bar is uniformized. The non-solidifying layer is pressed and solidified under no shifting of the inner part, and so it does not develop any defects, such as segregation, center porosity, etc., to obtain the sound quality.