管约束WC粉末电爆喷涂涂层的形成  

Coating Forming by Electrical Explosion Spraying of WC Powder in the Constraining Tube

作　　者：朱亮[1] 石茂虎[1] 王永[1] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料省部共建国家重点实验室,甘肃兰州730050

出　　处：《稀有金属材料与工程》2014年第4期968-972,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金资助项目(51061011)

摘　　要：采用压敏胶载送粉末连续电爆喷涂方法，进行WC粉末电爆喷涂，分析初始电压与喷射腔横截面积对涂层形成的影响。结果表明：在3～7mm喷涂范围内，可形成表层为液相喷涂层和底层为气相沉积层的复合涂层。在较小的喷射腔横截面积下升高初始电压，能提高爆炸的区域温度和产物速度，增加气相份额。分析认为：气相优先形成气相沉积层，且气相沉积层与基体结合致密；残留的液相滞后喷射，并覆盖在气相沉积层上形成液相喷涂层。By means of powder electrical explosion spraying of continuously carrying powder with pressure-sensitive adhesive, WC coating was prepared. The effects of initial voltage and the cross-sectional area of jet chamber on the forming of coating were analyzed The result shows that in the distance of 3-7 mm, hybrid coating is formed which consists of a surface for liquid spraying coating and a bottom for vapor deposition coating. When raising the initial voltage within minor cross-sectional area of jet chamber, the temperature and the velocity of the blast area can be increased to raise vapor share. It is thought that vapor deposition coating is formed preferentially and combined with substrate densely. Residual droplets spurt is lagged, and liquid spraying coating is formed which covers the vapor deposition coating

关 键 词：管约束 电爆 液相喷涂层 气相沉积层 

分 类 号：TG174.4[金属学及工艺—金属表面处理]