| 摘要 |
PURPOSE:To manufacture an H shaped steel excellent in shape by measuring the temperature of the flange part on the inlet side/the outlet side of a water cooling zone and correcting the flow rate of cooling water through the temperature deviation from the preset target temperature. CONSTITUTION:After a material to be rolled is rolled roughly in a rough mill 13, it psses a water cooling 1st zone 3, an air cooling zone 6, a water cooling 2nd zone 4 and a water cooling 3rd zone 5 through finish rolling by a finishing mill 14. The flange part of the material to be rolled is cooled by the cooling water in each water cooling zone. The temperature of the material to be rolled is measured by thermometers 8, 9, the amount of cooling water of water cooling zones 3, 4, 5 is corrected so that the temperature of the material to be rolled takes a set target temperature suitable to manufacture the H shaped steel. |
