提出了介质在淬火槽中有效淬火区的概念；对比了三种淬火介质水、光亮淬火油、聚合物PAG溶液在淬火槽内流场分布的不同；
The concept of " effective quenching zone " was put forwards , and the difference of flow field among water , bright quenching oil and polymer solution were compared .
光亮淬火油