冷床主要有拔齿式冷床、齿条步进式冷床、拨爪式冷床、运载链式冷床、滚盘式冷床等。
将已轧制成型产品通过辊道输送进入冷床，再由齿条步进式拔齿等形式，将排列在冷床上的工件逐步移向冷床顶端，达到了工件的冷却效果。
The main bed tooth pulling type cooling bed, rack step type cooling bed, poking claw type cooling bed, carrier chain cooling bed, rolling disc cooling bed etc..
The rolling molding products through the conveyor into the rack cooling bed, stepping teeth and other forms, will be arranged in workpiece cooling bed is gradually moved to the top of the bed, the cooling effect of the workpiece.
当流态层温度为250℃时，奥氏体分解温度为550～600℃，同铅浴淬火相似；当流态层温度为300℃时，奥氏体分解温度约为500℃左右，比铅浴淬火还低。
When the temperature of the flow layer is 250 C, the austenite decomition temperature is 550~600, similar to that of lead bath quenching. When the flow state temperature is 300, the austenite temperature is about 500 C, which is lower than the lead bath quenching.
流态冷床法的基本原理是：利用一定速度的气流吹动沸腾床上的固体颗粒，使之处于悬浮运动状态，依靠煤气在流态层中的燃烧，使流态层具有要求的温度，线材从中通过时冷却，完成奥氏体的分解转变。
The basic principle of the flow state cold bed method is that the solid particles on the fluidized bed are blown by the flow of gas at a certain speed, so that it is in the state of suspended motion, depending on the combustion of gas in the flow state, the flow layer has the required temperature, and the wire is cooled when it passes through, and the and transformation of the austenite is completed.
潜行装置有两种形式：一种是杠杆式，另一种是滑块式。带潜行装置的拉钢式冷床很大优点足冷床床面利用率可达60%，可以自由地储存轧件，机动性能较好。
There are two forms of stealth device: one is lever type, the other is slider type. The biggest advantage of the pull steel cooling bed with stealth device is that the utilization rate of the cold bed can reach 60%, so that the rolling parts can be stored freely and the maneuverability is better.