Affect the melt flow rate and the cooling speed.

会影响熔体的流动性和冷却速度。

Fast cooling speed was the main reason of generating cold crackle.

认为冷却速度过快是产生冷裂纹的主要原因。

Using the method of program cooling speed is slow, has small damage to the cells.

程序降温法降温速度较缓，对细胞的损伤小，保存的长期性和安全性均可得到保障。

The impact toughness decreased with decreasing the cooling speed of quench and temper.

结果表明：随着淬火和回火冷却速率的减慢，材料的冲击韧度下降；

The cooling speed gradient leads to a gradually changed microstructure of the fused materials.

依冷凝速率梯度不同，该组成样品可以获得显微结构渐变的熔融材料。