| 摘要 |
<p>PURPOSE:To perform titled temperature control, by spraying water onto a strip under conditions of including the data on the temperature distribution of a strip detected by several kinds of detectors and the data on the several conditions of transformation depending on the several kinds of steels. CONSTITUTION:In hot rolling a carbon steel containing 0.10-1.7% carbon or an alloy steel, the temperature distribution of a strip 4, moving from a hot finishing mill 1 to a coiler 3 through a cooling device 2, is detected by a thermometer 5 at the exit of the mill 1, intermediate thermometers 6, and a thermometer 7 at the front of the coiler 3. These detected values, and the heat capacity of transformation, the starting temperature of the transformation, and the time of the transformation depending respectively on the kinds of steels are included into the conditions of water cooling spraying cooling water from nozzles 9 onto the strip 4. Thus, by controlling the positions of starting and completing the transformation to an optional position, the temperature distribution of the strip 4 at the coiler 3 is controlled to be in an untransformed state, under transformation, and a completely transformed state, and further, the starting of transformation is controlled at the position of the thermometer 6.</p> |
