| 摘要 |
PCT No. PCT/JP81/00356 Sec. 371 Date Jul. 6, 1982 Sec. 102(e) Date Jul. 6, 1982 PCT Filed Nov. 27, 1981 PCT Pub. No. WO82/01894 PCT Pub. Date Jun. 10, 1982.A continuous hardening device of steel plate of a type wherein steel plate is continuously cooled and hardened by cooling water. The cooling water is continuously supplied into and exhausted out of a water vessel (10) provided in the path of the steel plate for cooling the same. A plurality of rollers (16, 18) supporting the steel plate on the upper and lower sides thereof to feed the same and a plurality of paddle wheels (32, 34) having axial shafts disposed in parallel with the rollers (16, 18) are provided in the water vessel (10). Each paddle wheel (32, 34) is disposed between adjacent rollers and close to the steel plate, and stirs and causes the cooling water to flow along the surface of the steel plate with a predetermined relative speed maintained between the cooling water and the steel plate. The cooling and hardening efficiency of the steel plate is substantially improved by the relative movement of the cooling water and the steel plate. |
