电弧喷涂锌合金液滴飞行过程数值分析  

Numerical analysis of arc spray Zn-Al droplets in flight

作　　者：王伊卿[1] 孙琨[1] 周宏志[1] 朱东波[1] 赵文轸[1] 卢秉恒[1] 

机构地区：[1]西安交通大学机械学院,西安710049

出　　处：《中国有色金属学报》2001年第6期1083-1088,共6页The Chinese Journal of Nonferrous Metals

摘　　要：运用流体力学、传热学以及相变等理论 ,建立数学模型描述金属液滴与气流的相互作用 ,计算了金属液滴的飞行速度和温度衰减过程。结果表明 :金属液滴飞行速度、温度以及凝固程度是金属液滴直径、飞行距离的函数 ;金属射流中固态金属颗粒比例是金属射流中金属液滴质量分布的函数 ;飞行距离 6 0 0mm以内 ,固态、半固态金属颗粒所占比例不超过 2 %。An integral model for arc spray Zn Al droplets in flight was developed using established theoretical principles of fluid mechanics, heat transmission and phase transformation. Mathematical models describe the interconnected processes of droplet gas interactions in flight. The calculation result of Zn Al droplets velocity and temperature shows that droplets velocity and temperature are function of flight distance and droplets diameter. Percentage of solid droplets in metal spray is a function of droplets size distribution. In flight distance(<600?mm), depending on size and cooling rate, the droplets in metal spray are completely liquid, partially solidified, or completely solidified, the percentage of partially solidified, or completely solidified in metal spray do not exceed 2%.

关 键 词：电弧喷涂 速度 温度 锌合金 数值分析 

分 类 号：TG174.442[金属学及工艺—金属表面处理] TB115[金属学及工艺—金属学]