In the poly strand mils the strange steel type strange size simultaneous rolling manner

摘要

PURPOSE: To stably execute rolling without trouble and to prevent a lowering of productive efficiency due to size change by rolling each billet under the same rolling conditions during multibillet pass rolling and rolling billets into different sizes of products by respective strands in one billet pass rolling. ;CONSTITUTION: Two billets of low carbon steel which are rolled by No.1 strand and No.2 strand and one billet of steel for special welding which is rolled in the rolling parts of No.3 strand are alternately charged into a walking beam type heating furnace 1, extracted from each prescribed strand of the rolling line 2 for three billets pass rolling and rolled by the same shape of caliber and the same dimension of caliber. After that, by rolling them in the rolling lines 3 for one billet pass rolling, respectively executing finish rolling at specified rolling speeds with finishing mills 4, coiling and cooling, wire products of steel for special welding are obtained. In the case the billets of different kinds of steel or billets which are rolled into different sizes of products are rolled by every strand, stable rolling can be executed without trouble.;COPYRIGHT: (C)1993,JPO&Japio