| 摘要 |
PURPOSE:To reduce an unequal temperature distribution in the section of wire rod transferred in a cooling zone by a high temperature blast of next stage, by providing cooling mechanism by jetting cooling medium immediately after carrying out ring formation of hot rolled wire rod. CONSTITUTION:The high temperature wire rod 2 gotten out from the finish rolling machine 1, is formed in a ring shape by the ring forming machine 6. The wire rod ring 7 is intermittently cooled by cooling medium jetted from the nozzle arranged on the inner circumference face of the rotating cylindrical body for cooling medium jetting 10 moving on the outer circumference face of the cylindrical body for ring support 8 in nonrotating state. Hereby, ununiformity of temperature distribution in the wire rod section is lightened. The wire rod ring 12 gotten out of the second cooling zone 11, is dropped on the wire rod ring transfer apparatus 9 and is placed eccentrically and then, is sent to the third cooling zone and the rest controlled circulating blast temperature. By the above apparatus, structure and mechanical property of the wire rod after direct heat treatment can be controlled in a wide range. |
