| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method in which the rapid cooling of a steel plate is performed from just after finish rolling, light draft rolling is not performed after the rapid cooling and which has not adverse effect on a measuring instrument group on the downstream side of a finishing mill, in a method of manufacturing the hot-rolled steel plate by which a rough-rolled steel material is finish-rolled with the finishing mill composed of a plurality of stands. Ž<P>SOLUTION: In this method of manufacturing a hot-rolled steel plate, a steel material 1 to be rolled is water-cooled in one or more spaces 3 between the stands on the late stage of the finishing mill, the rolling rolls 4 of a stand 2 on the downstream side of a position where the water-cooling is performed are released, the roll gap between those rolling rolls is taken as not more than the value which is obtained by adding 7 mm to the target thickness and the water on the plate which leaks out from the downmost-stream stand 2e is removed, on the outlet side of the downmost-stream stand 2e of the finishing mill. Since the light reduction after performing the rapid cooling just after rolling is not performed, the mechanical properties of the steel plate is improved by the rapid cooling of the steel plate just after the finish rolling. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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