摘要
采用枪内混气方式,设计研制了一种采用炽热体作为稳焰器的液体燃料-空气/氧气混合助燃超音速火焰喷涂枪.用SprayWatch热喷涂监测系统测试喷涂枪焰流出口速度和温度,并研究喷涂工艺对WC-12Co涂层组织和性能的影响.结果表明,喷涂枪焰流出口速度超过1300m/s,焰流温度可在2302～3410K之间进行精确调节,精度达到±50K;提高空气/氧气比,涂层中WC保留率明显提高,使涂层硬度比氧气助燃时得到明显提高;采用空气助燃进行喷涂,可以得到厚度超过5mm的WC-12Co涂层.
A supersonic flame spraying gun in which liquid fuel and air-oxygen are mixed in chamber to improve combustion stability by flameholder was obtained. The speed and temperature of jet from the gun was measured by the Spraywatch monitor system. The microstructure and properties of the WC-12Co coatings produced by the gun were investigated. The results indicate that the jet speed exceeds 1 300 m/s,and the adjustable range of temperature is 2 302 K to 3 410 K,which an accuracy of adjustment reaches ±50 K. The WC retention rate in the coating increases with the increasing of air and oxygen mixing ratio,and so the hardness of coatings increases. The thickness of the coating obtained by spraying with air-supporting combustion is over 5 mm.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2010年第6期81-84,共4页
Transactions of The China Welding Institution
基金
天津市科技发展计划科技攻关专项资助项目(043104011)
关键词
超音速火焰喷涂枪
稳焰器
混合助燃
WC-12CO涂层
supersonic flame spraying gun
flameholder
air-oxygen combustion-supporting
WC-12Co coating
