METHOD FOR CONTROLLING PRODUCT SHAPE IN ROLLING OF THICK PLATE

摘要

PURPOSE:To control the shape of a thick plate with a min. of the number of passes of edger rolling and to improve rolling efficiency by subjecting a slab to edging rolling narrower in both ends in the transverse direction thereof than the central part and rolling the slab horizontally in the transverse direction then subjecting the slab to the edging rolling longitudinally. CONSTITUTION:The roll gap when both end parts in the transverse direction of a slab passes through rolls is made narrower than the gap when the central part passes through in the edging rolling III in the transverse direction of the slab in the stage of rolling a thick plate including the edging rolling. The build up parts in both end parts of the slab produced by the edging are horizontally rolled in the transverse direction of the slab. The slab is then rotated 90 deg. within the horizontal plane and is subjected to edging rolling 4 longitudinally.