PROCESS FOR SLITTING SLAB Russian patent published in 2001 - IPC

FIELD: rolled stock production, namely manufacture of rectangular cross section blanks for rolling bars from continuously cast slabs. SUBSTANCE: process for slitting slab in multigroove pass with mutual axial shifting of cutting ridges of upper and lower rolls comprises steps of embedding cutting ridges into slab for separating the last by blanks in open box pass with grooves formed by means of cutting ridges in such a way that depth of embedding ridges of lower roll into slab is equal to 0.14-0.17 of slab thickness. In order to reduce axial loads and to improve surface quality of blanks, slab is separated by odd number of blanks in multigroove pass in which adjacent cutting ridges of upper and lower rolls are mutually shifted to opposite sides in axial direction. Process provides reduced numbers of rolling passes at enhancing blank quality in zones for separating slab. EFFECT: enhanced efficiency, improved quality of blanks. 2 cl, 2 dwg, 1 tbl, 2 ex