| 摘要 |
PURPOSE:To provide an installation train which can cool steel stripes having a wide range of thicknesses at a desired cooling rate by disposing a roll cooler having tensioners at the front and rear behind a high-speed gas injection cooler in the steel strip cooling zone of a continuous annealing installation for which a gas injection system and roll cooling system are connected. CONSTITUTION:The steel strip 7 is continuously passed in an arrow direction by many hearth rolls, etc. in the continuous annealing installation disposed continuously with a heating furnace 1, a holding furnace 2, the high-speed gas injection cooler 3, the roll cooler 4, an overaging furnace 5 and a secondary cooling furnace 6. The cooler 3 has the capacity to cool the steel strip having <=0.7mm thickness at a cooling rate of >=70 deg.C/s. Bridle rolls 10 for the purpose of applying tension to the strip are provided on the inlet side and outlet side of the cooler 4.
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