| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling control method for a hot-rolled steel strip by which cooling of a hot-rolled steel strip (particularly, a tip of the hot-rolled steel strip) can be reliably controlled in a manufacturing line of the hot-rolled steel strip.SOLUTION: A finish rolling inlet side temperature of a steel strip 30 is measured in FET21, a finish rolling outlet side temperature (a measurement value in FDT22) is predicted on the basis of an actual value in said FET21 and actual value of rolling condition in a finish rolling machine 2 (for example, a plate passing velocity v of the steel strip 30, a rolling load P, an amount of roll cooling water in each stand) when a tip of the steel strip 30 passed F7 stand in the finish rolling machine 2), and cooling condition of a runout cooler (number of nozzles used in rach bank (No.1 bank 11, No.2 bank 12, etc.)) is feed-forward controlled on the basis of the vale predicted in FDT22.SELECTED DRAWING: Figure 5 |
