| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method and a device for manufacturing a thick steel plate by which the generation of defects in shape such as bar-cutting strain without inhibiting productivity by adjusting thermal stress so as to be uniformize residual stress distribution about the thick steel plate which is manufactured by performing water cooling after hot rolling. <P>SOLUTION: As for the thick steel plate 1a which is hot-rolled with a roughing mill 3 and a finishing mill 4 and cooled with a water-cooling device 5, the shape is straightened with a hot leveler 6 and, after that, the surface of the thick steel plate 1a is rapidly heated so that the surface temperature in the vicinities of the end parts of the width of the thick steel plate 1a is higher than that in the middle part of the width by passing through a rapid heating device 8. <P>COPYRIGHT: (C)2004,JPO</p> |
