| 摘要 |
PROBLEM TO BE SOLVED: To provide medium/high carbon steel plates which have the small dispersion of mechanical properties and a method of hot-rolling the same and equipment for manufacturing the same. SOLUTION: Regarding a medium/high carbon steel plate containing, by mass, 0.40-1.00% C, after keeping the steel plate which is rough rolled with a roughing mill 2 warm in a coil box 3, finish rolling in which an outlet-side rolling speed (mm/s)×an outlet-side plate thickness (mm) is≤18,000 mm<SP>2</SP>/s at the accumulative draft of≥25% in final three stages and the final finishing temperature is taken as Ar3 or from Arcm to 850°C is performed with a finishing mill 4. COPYRIGHT: (C)2011,JPO&INPIT |
