大气超声速火焰喷涂技术(HVAF)是利用气态燃料(丙烷、丙烯等)和空气燃烧形成的高超声速焰流来加热加速喷涂材料,撞击基体形成涂层的一种工艺方法。该技术具有焰流温度低(<1600℃)、粒子速度快(>600 m/s)、涂层质量好、运行成本低等诸多优点,在制备高性能WC、Cr_3C_2基金属陶瓷涂层,Ni基、Fe基、Cu基、Al基金属及其合金涂层方面优势明显。美国UNIQUECOAT新型HVAF-M3系统是目前国际最先进的HVAF设备,系统自带喷砂与内孔喷涂 Atmospheric supersonic flame spraying (HVAF) is a process that utilizes the supersonic flame flow formed by the combustion of gaseous fuels (propane, propylene, etc.) and air to heat up the spray material and impact the substrate to form a coating. The technology has many advantages, such as low temperature of flame flow (<1600 ℃), fast particle velocity (> 600 m / s), good coating quality and low operation cost. In the preparation of high performance WC, Cr_3C_2-based cermet coating, Base, Fe-based, Cu-based, Al-based metals and their alloy coating has obvious advantages. United States UNIQUECOAT new HVAF-M3 system is the most advanced HVAF equipment, the system comes with sandblasting and bore coating