| 摘要 |
PURPOSE:To perform width unification by rolling in an on-line process by rolling a slab by bringing an average surface temp. in low temp. parts generated in the slab width direction supported by skids in a heating furnace during rolling to be a specific temp. CONSTITUTION:A continuously cast metal slab 1 containing <=0.005% C is edged by an edger mill having vertical rolls 2, 4 provided with a caliver. Then, the slab 1 is horizontally and repeatedly rolled to the thickness equal or below to the original thickness before rolling by a horizontal rolling mill 3 to have both target slab thickness and width. In that time, rolling is performed by bringing an average temp. of low temp. parts generated in the width direction supported by skids in a heating furnace to be >=900 deg.C or <=870 deg.C. Hence, width unification by rolling in an on-line process is performed. |
