要使中厚板淬火控冷装置获得最佳的冷却能力，必须要保证冲击射流可以穿透钢板表面的滞留水层。
To make quenching and control cooling equipment of plate achieve optimum cooling performance, it is necessary to ensure the impinging jet able to penetrate through the water layer deposited on plate.
中厚板无约束淬火主要采用上下集管圆形射流冲击冷却方式，使淬火钢板在向前行进的过程中得到冷却。
Unconstrained quench of medium steel plate adopt round nozzle impinging jet cooling mode, and steel plate is cooled during being pushed ahead.
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