| 摘要 |
PURPOSE:To execute rolling of an extra thin hot rolled steel sheet with high efficiency and to suppress the generation of oxide scale by coiling immediately a hot rolled steel sheet coming out of a final stand, after allowing it to pass through a series of measuring machine group, and subsequently, carrying its coil as it is to another line, and thereafter, uncoiling it. CONSTITUTION:A hot rolled steel sheet 10 is rolled finally by a finish rolling mill train 12 consisting of a rolling mill group of 6-7 stands, and thereafter, fed to a run-out table 30 after measuring width, thickness, temperature, sheet crown, etc., of the hor rolled steel sheet by a series of measuring machine group 14. Prior to the foregoing, the sheet is coiled by a coiler 22 contained and provided in a container 20, and the container 20 is in a non-oxidizing atmosphere of inert gas or nitrogen gas, etc., and prevents the surface of the steel sheet from being oxidized. In such a way, by dividing the line, the productivity can be improved by rolling a thin steel sheet at a high speed. Also, by placing a coiler under a protective atmosphere, a steel sheet being free from oxide scale can be manufactured. |
