| abstract |
Rolling slabs with a thickness of 80 mm or less in a facility directly connected to a continuous casting machine and a hot rolling mill enables low-speed rolling while suppressing the temperature drop and the generation of scale of the rolled material, thereby realizing mini hot.n n n The slab 2 having a thickness of 80 mm or less cast in the continuous casting machine 1 is heated and scaled off, and roughly rolled to a thickness of 20 to 60 mm with a dense 7 which is a 4H-twin mill, and then heated and scaled off. Finish rolling is carried out by the finishing mills 19-21 provided with the predetermined | prescribed work roll of 500 mm or less directly, and it is set as the thin board of 1.6 mm-15 mm of sheet thickness, or the thick board of 3 mm-40 mm of plate thickness. Moreover, the rolling speed | rate of the exit mill 19-21 exit side can be made into the low speed of 350 m / min or less, and a production scale can be made small, and an installation length can be made into 100 m or less, and the installation amount can be made small. |