| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To reduce the generation of surface flaws over the whole area in the width direction of a slab by rationalizing the distribution of draft in the width direction when manufacturing a steel plate by hot rolling. <P>SOLUTION: A numerical formula model which expresses the relationship between the ratio he/hc of the average slab-thickness he in sections (hereinafter referred to as edge parts) which are within 1/9 from both ends of the slab width before the first pass of rough rolling to the average slab-thickness hc in a section (hereinafter referred to as the middle part of the width) which is on the side closer to the middle of the width than to the edge parts and the edging rate in the edging before the first pass of the rough rolling is beforehand prepared and the amount of edging is set so that the slab-thickness ratio he/hc is the target value. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
