| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a high-efficiency hot-rolled steel sheet by which production efficiency can be improved without causing great facility investment in a hot-rolling line where a breadthwise pressing apparatus is installed on the upstream side of a roughing mill (especially in a hot-rolling line where a breadthwise pressing apparatus is introduced later). <P>SOLUTION: The total (B+C) of a length (B) of a slab 12 that has been pressed and that (C) of a preceding slab 13 that has not been processed for rough rolling final pass is compared to a distance (A) between a breadthwise pressing apparatus 14 and a roughing mill 16. When the (B+C) exceeds the distance (A) ((B+C)>A), the rough rolling of the early slab 13 is completed, and then the breadthwise pressing of a slab 11 is started. When the (B+C) is not more than (A) ((B+C)≤A), the breadthwise pressing of the slab 11 is started regardless of the completion of rough rolling of the preceding slab 13. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
