超音速火焰噴涂
超音速火焰噴涂設(shè)備的核心為噴槍,噴槍由燃燒室(使噴涂材料粒子得到充分加熱加速)、Laval噴嘴(將焰流加速到超音速)和等截面長噴管(使噴涂材料粒子得到充分加熱加速)三部分組成。其工作原理如下:由小孔進入燃燒室的液體燃燒,如煤油,經(jīng)霧化與氧氣混合后點燃,發(fā)生強烈的氣相反應,燃燒放出的熱能使產(chǎn)物劇烈膨脹,膨脹氣體流經(jīng)Laval噴嘴時受噴嘴的約束形成超音速高溫焰流。此焰流加熱加速噴涂材料基體表面,形成高質(zhì)量涂層。
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熱噴涂
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產(chǎn)品描述
超音速火焰噴涂設(shè)備的核心為噴槍,噴槍由燃燒室(使噴涂材料粒子得到充分加熱加速)、Laval噴嘴(將焰流加速到超音速)和等截面長噴管(使噴涂材料粒子得到充分加熱加速)三部分組成。其工作原理如下:由小孔進入燃燒室的液體燃燒,如煤油,經(jīng)霧化與氧氣混合后點燃,發(fā)生強烈的氣相反應,燃燒放出的熱能使產(chǎn)物劇烈膨脹,膨脹氣體流經(jīng)Laval噴嘴時受噴嘴的約束形成超音速高溫焰流。此焰流加熱加速噴涂材料基體表面,形成高質(zhì)量涂層。 超音速火焰噴涂具備以下特點:
(1)焰流速度高但溫度相對較低,適合噴涂含碳化物材料
(2)涂層致密,表面粗糙度低
(3)結(jié)合強度高
(4)噴涂效率高
supersonic flame spraying
The core of the supersonic flame spraying equipment is the spray gun, which consists of three parts: the combustion chamber (so that the spray material particles are fully heated and accelerated), the Laval nozzle (to accelerate the flame flow to supersonic speed) and the equal cross-section long nozzle (so that the spray material particles are fully heated and accelerated). The working principle is as follows: the liquid combustion, such as paraffin, which enters the combustion chamber through a small hole, is atomised and mixed with oxygen and then ignited, a strong gas-phase reaction occurs, and the heat energy released by combustion causes the product to expand violently, and the expanding gas is constrained by the nozzle to form a high-speed and high-temperature supersonic flame stream when it flows through the Laval nozzle. This flame stream heats up and accelerates the surface of the sprayed material to form a high quality coating. Supersonic flame spraying has the following characteristics:
(2)High flame speed but relatively low temperature, suitable for spraying carbide-containing materials.
(2) Dense coating with low surface roughness
(3) High bonding strength
(4) High spraying efficiency
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