METHOD FOR ROLLING HOT SLAB IN ITS WIDTH DIRECTION BY PRESS

摘要

PURPOSE:To reduce the formation of tongue at the rear end of a slab by preforming the rear end of slab by the slant part of the exit side of an anvil, before once retreating the nonstationary deformation region of slab for rolling it in the width direction in the same manner as for rolling the stationary deformation region. CONSTITUTION:In pressing a hot slab 4 into a prescribed width WP by using a pair of anvils 3; the slab 4 is continuously rolled in the width direction by utilizing the slant parts and parallel parts of the inlet side of anvils 3 in a stationary deformation region containing the front end of slab 4, and the rear end of slab 4 is preformed by the slant parts 6 of the exit sides when the slab 4 rear end reaches a nonstationary deformation region (l). Successively, after once retreating the slab 4 in the R' direction, the nonstationary deformation region (l) is rolled in the width direction in the same manner as for the stationary deformation region, to maintain the plane shape of slab 4. In this way, the tongue formation at the rear end of slab can be reduced without lowering the high productivity with respect to the heavy rolling reduction of hot slab.