| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce an edge wave sharpness, edge wave volume and to eliminate a bad take up by an injection of a cooling water towards the edge wave shaped steel plate end portion at the down stream side of an induction heating process of the steel plate end portion. SOLUTION: The cooling water is ejected from the plural number of spray nozzles 3 arranged at the upper and the bottom of a cooling room 2 against the end portions of the steel plate 1. The end portions of the steel plate 1 is cooled down, for example, from 950 deg.C to 350 deg.C while passing through the cooling room 2. An ejection angel formed with the cooling water ejected from the spray nozzle 3 and the steel plate 1 is desirous to be 75 deg. or less. A scraper 5 is installed nipping the steel plate 1 in a vertical direction from the upper and the bottom portions of the cooling room 2, so that the cooling water does not flow into the central portion direction of the steel plate 1. The scraper 5 is attached closely to the spray nozzle 3. Space between the tip end of the scraper 5 at the steel plate 1 side and the steel plate 1 is set as small as possible.</p> |
