| 摘要 |
<p>PURPOSE:To secure a temperature history an a take-up temperature necessary to embody a desired material all over the length of a steel plate through a simple calculation. CONSTITUTION:Many water cooling banks 4 which can adjust on/off of injection of cooling water to the steel plate and its amount of injecting water independently of each cooling bank are set between a finishing mill 2 and a take-up machine 3 for the steel plate 1 at intervals in the transfer direction to make up a cooling zone and an outlet temperature gage 9 for finishing the steel plate 1 and a taken-up temperature gage 10 are arranged respectively on the outlet side of the finishing mill 2 and on the outlet side of the cooled zone. Sampling points detected by the finishing outlet temperature gage 9 at certain time intervals are tracked in consideration of the speed of the steel plate 1 and its speed change, the amount of injected water of each water cooling bank 4 is controlled so that each sampling point is not influenced by the speed change of the steel plate 1 and a fixed cooling speed is kept, and the length of all water cooling banks is controlled by putting on/off the water cooling banks 4 so that the sampling point indicates the objective take-up temperature through an air cooling process after completion of water cooling.</p> |
