流射沸腾冷却强化机理  

Flow-Jet Boiling Cooling Enhancing Mechanism

作　　者：王邦文[1] 李谋渭[1] 吴宗健[1] 刘国勇[1] 李生勇[1] 崔乃忠[1] 靳哲[1] 

机构地区：[1]北京科技大学机械工程学院,北京100083

出　　处：《北京科技大学学报》2004年第2期169-173,共5页Journal of University of Science and Technology Beijing

摘　　要：流射沸腾冷却强化的核心是利用常压水形成的水柱,以一定的速度贯穿水层,与钢板表面直接接触,产生核沸腾区,引起了强烈沸腾,通过对射流出口速度、高度、直径及水柱间距的优化的实验研究,达到了在整个钢板横截面上获得极强冷却区的效果,对于20mm厚的钢板,冷却速度可达45.2℃/s,板形精度可达3mm/m。The fundamental principle of flow-jet boiling enhancing is proposed. The water column caused by normal pressure water thrusts through the water layer at a certain velocity to directly contact the plate surface. A nuclear boiling area can be established and intensive boiling will occur. The effect of the extreme cooling area on the entire cross section of the steel plate can be obtained via an optimized experimental research on the outlet velocity, height, diameter of flow jet and distance between adjacent water columns. For a plate of 20 mm thick, the cooling speed is up to 45.2°C/s and the shape precision up to 3 mm/m.

关 键 词：流射沸腾 冷却强化 淬火控冷 板形精度 

分 类 号：TG156.3[金属学及工艺—热处理]