Soft reduction control method of the slab in the continuous casting

摘要

PROBLEM TO BE SOLVED: To establish a pressure of a pinch roll as a proper value based on a load of a roll segment under casting, and thereby to perform light rolling reduction on a proper condition in a method of carrying out light rolling reduction of a cast slab using a light rolling reduction zone of a roll segment system in which a pinch roll has been arranged.;SOLUTION: The light rolling reduction controlling method is characterized as follows. A light rolling reduction zone which consists of a roll segment 15 in which a pair of pinch rolls 21 and two or more pairs of reduction rolls 6 have been included at least is used, in carrying out reduction of a cast slab 10 of a solidification last stage by a rolling draft of the amount of solidification shrinkage, a load which works to the roll segment is measured at least two sections of an upstream side section and a downstream side section of the roll segment, a light rolling reduction load which should be loaded to each of rolls arranged at the roll segment based on a measured load is obtained, and a pushing pressure of the pinch roll is established so that a light rolling reduction load which should be loaded to the pinch roll and a load by the pinch roll may be equivalent in light rolling reduction loads which have been obtained.;COPYRIGHT: (C)2012,JPO&INPIT