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对比研究了高速电弧喷涂和普通电弧喷涂ＡＩ和３Ｃｒ１３的粒子速度和雾化特性，用Ｐｉｔｏｔ管总压法。双转盘法和扫描电镜、图象分析仪分别测定了喷枪出口雾化气流速度和粒子速度的轴向分布，以及不同工艺条件下雾化粒子的粒度分布。用ＰｅａｒｓｏｎＸ２分布拟合检验法对粒子的粒度分布进行统计分布检验。结果表明，高速电弧喷涂ＡＩ和３Ｃｒ１３粒子的平均飞行速度为３４２ｍ／ｓ和３８８ｍ／ｓ；雾化粒子平均粒度分别为普通电弧喷涂的１／３和１／８；雾化气流轴向速度在主要雾化区间（ｄ＜１００ｍｍ）为７００－５５０ｍ／ｓ；高速电弧喷涂和普通电弧喷涂川粒子的粒度具有相同的分布规律，而高速电弧喷涂３Ｃｒ１３粒子的粒度却具有不同的分布规律。探讨了高速电弧喷涂雾化机理和影响粒子速度的因素。
The particle velocity and atomization characteristics of high speed arc spraying and ordinary arc spraying AI and 3Cr13 were compared and studied. Pitot tube total pressure method was used. The dual-disk method, scanning electron microscope and image analyzer were used to determine the axial distribution of atomizing gas velocity and particle velocity at the outlet of the spray gun and the particle size distribution of the atomized particles under different process conditions. The particle size distribution was tested by Pearson X2 distribution fitting test. The results show that the average flying speeds of AI and 3Cr13 particles for high speed arc spraying are 342m / s and 388m / s, respectively. The mean particle size of atomized particles is 1/3 and 1/8 of that of normal arc spraying respectively. The atomization interval (d <100mm) was 700-550m / s. The particle size distribution of high velocity arc spraying and ordinary arc spraying was the same, while that of high speed arc spraying 3Cr13 particles had different distribution. The atomization mechanism of high-speed arc spraying and the factors affecting the particle velocity were discussed.