轧件越厚，起始温度越高，温降速度越快。
The bigger plate thickness is and higher the initial temperature is, the quicker temperature drop is.
结果表明：初始时刻叶片表面和环境温差较大，温降较快，随着冷却过程进行，温降速度变缓；
The results show that the temperature reduces fast at first stage, because of the larger difference between blade and air. Then, the temperature reduction rate decreases slowerly, in cooling process.
汽轮机快速冷却技术是在汽轮机组停运后，向汽轮机内部通以适量的较低温度的冷却介质，进行强迫对流换热，加快汽缸和转子温降速度的过程。
The fast cooling technology of steam turbine is the process that the cooling medium is used to accelerate the temperature reduction of cylinder and rotor after the shutdown of turbogenerator.
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