双丝电弧喷涂中粒子交叉飞行行为的在线测量及分析

On Line Measurement and Analysis of Cross Flying Behavior in Twin Wire Arc Spray

采用两根具有不同熔点的材料分别作为双丝电弧喷涂的阳极和阴极丝材,采用SprayWatch-2i热喷涂监测系统,通过对融熔粒子飞行中温度的在线测量分析,直接验证了粒子的“交叉飞行”现象。利用能谱仪(EDS)定量研究了两极的材料和氧化物在喷涂沉积丘中的分布,并分析了这些分布特征在不同喷涂距离上的变化规律,结果发现,沿喷涂丘的横截面,来自阴极和阳极的扁平化粒子以接近反对称的方式分布。在所测量的两个喷涂距离上,各种成分(包括氧化物)的含量随喷涂距离变化不大。而且电弧喷涂涂层中具有约10%左右的氧化物含量。

Using two consumable wires of different melting point as anode and cathode in high velocity arc spraying process, the‘cross flying＇ behavior of particles from the twin wires was demonstrated directly by on line measurement and analysis of particles average temperature distribution by a Spray Watch-2i thermal spray monitoring device. The distribution of oxides and materials from the twin wires in the spray deposit was measured quantitatively by energy dispersive spectrum analysis. The results showed that, across the deposit, the flattened particles from the anode and cathode distributed unsymmetrically around the spray jet center. In the investigated spray distance, the content of various composition （including oxides） varied insignificantly with spray distance. In the electric arc spray coating the oxide content was about 10 %.