Method of producing thin hot rolled steel sheet, and apparatus to carry out the method

摘要

To produce, at low cost and high yield, a thin hot rolled steel sheet which can be used as a substitute for a cold rolled steel sheet, a slab, which can have a length exceeding the dimension of a reheating furnace, is received directly from a continuous casting equipment (1) and hot rolled in a roughing mill (3), directly connected to the continuous casting equipment (1). A coil box (4) coils and thermally insulates the sheet bar. A sheet bar heating device (6) then heats the sheet bar received from the coil box (4), reversed end-for-end, for finish rolling in a finishing rolling mill (7).