| 摘要 |
<p>PURPOSE:To uniformize the temp. distribution in the plate length direction and to reduce the range of the non-steady part with inferior mechanical property by cutting off a cooling water or by adjusting the quantity at the front end part and rear end part of a steel plate. CONSTITUTION:Cooling water header 2, 2' is fitted in parallel to a transfer roll 6 and provides with the cooling water injection nozzle 3, 3' fitted in opposition at the prescribed intervals. The shielding plate 4, 4' shielding over the whole plate width so that no cooling water abutts on the steel plate is respectively provided between the nozzle 3, 3' and a steel plate 7. The shielding plate 4, 4' moves by an adequate ON-OFF control device and can optionally adjust to shield the cooling water and to inject to the steel plate 7. In this way, the selective cooling of the plate center part to be directly cooled and the plate front and rear end parts that no cooling water is injected is performed.</p> |
