| 摘要 |
PURPOSE:To improve rolling efficiency and to reduce product cost by dividing longitudinally a material which is subjected to double reversible rough rolling to a plurality and subjecting simultaneously the divided materials to parallel rolling by intermediate rolling and finish rolling and cutting simultaneously the materials to a prescribed size. CONSTITUTION:A slab having the unit weight of double the weight of the slab in the prior art is heated to the prescribed temp. of about >=1,200 deg.C in a heating furnace F and is roughly rolled by plural passes of reverse shift rolling with a breakdown mill BD. The rolled slab is then bisected by an intermediate crop saw TCS and the top material is first fed to a finishing mill line and in succession, the bottom material is fed to the position in parallel with the top material. After the materials are simultaneously subjected to reverse rolling by tandem mills S1, S2, the materials are simultaneously finsih-rolled in one pass in a mill SF and while the parallel materials are held in tight contact with each other, the materials are transferred by a skew table to a hot saw HS and are simultaneously cut. |
