| 摘要 |
PURPOSE:To surely diminish the damage of rolling rolls and the rolling load, by intermittently drawing the billet continuously cast by the continuous casting machine with the pinch roll in order to obtain a slab which is thereupon to be rolled by a high draft rolling mill, and by rolling the slab with an ordinary rolling mill after passing the speed and tension adjusting mechanisms. CONSTITUTION:The molten steel held in a ladle 1 is fed through the tundish 2 to the pinch roll 5 whereby the steel is intermittently drawn into a slab which is then fed to a hot rolling mill 9 through the looper 7. A high draft rolling mill 18 with controlled constant roll gap such as a hydraulically loaded rolling mill is installed in place of an intermittent rolling mill, and the pinch roll 5 intermittently draws the cast billet while the length of intermittently drawn billet is measured by the measuring roll 23. The driving motor 24 of the pinch roll 5 and the driving motor 25 of the high draft rolling mill 18 and controlled by the controller 26 so as to synchronize with each other. By the present method, the direct rolling process obtained by continuation of the continuous casting machine and the rolling line can be stably, surely operated. |
