| 摘要 |
PROBLEM TO BE SOLVED: To suppress occurrence of streak-like deformation in the sheet width direction of a steel sheet. SOLUTION: A steel sheet S conveyed from a gas jet cooling zone side is cooled by cooling water 7 jetted through spray nozzles 6 of cooling equipment 4a, 4b before the steel sheet is immersed into cooling water 5 in a water tank 2. At this time, the spray nozzles 6 are arranged so that the number of the arranged spray nozzles decreases from both ends in the sheet width direction toward the center in the sheet width direction. Accordingly, a distribution state of the isothermal lines of the steel sheet S has a projecting arc shape relative to the water surface of the cooling water 5. In other words, a temperature distribution in which temperatures rise from both ends in the sheet width direction toward the center in the sheet width direction is formed in the sheet width direction of the steel sheet S. COPYRIGHT: (C)2012,JPO&INPIT |
