| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a time-saving efficient method for manufacturing a thick steel plate when manufacturing the thick steel plate by rolling. <P>SOLUTION: The method for manufacturing the thick steel plate includes: a preceding rolling step for hot-rolling the steel plate 3 by a reversible rolling mill 7 to have a controlled rolling start plate thickness at a controlled rolling start temperature; and a controlled rolling step for carrying out controlled rolling while controlling temperature or the like after the preceding rolling step. The preceding rolling step has an inter-pass cooling step for water-cooling the steel plate 3 at one side of the reversible rolling mill 7 between passes of a rolling pass. In the inter-pass cooling step, the steel plate 3 is cooled at a cooling speed of 15-300°C/sec before the steel plate enters the reversible rolling mill 7 at a next rolling pass (N+1 pass) after it passes through the reversible rolling mill 7 at a rolling pass (N pass). <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
