Spectral analysis of A-TIG welding arc with fluorides activating flux
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摘要: 氟化物作为最为常见的A-TIG焊活性剂配方之一，在实际焊接生产中已得到了广泛的应用，然而其对电弧行为的影响机制目前仍存在争议. 为此，利用光谱诊断方法对涂覆氟化物活性剂的A-TIG焊电弧空域光谱分布进行了研究，分析了活性剂粒子、氩、铁粒子在电弧空域中的分布特征，并结合Boltzmann图法计算了电弧电子温度. 结果表明，氟化物活性剂粒子主要分布于弧柱中心区域；氟化物的引入能够使电弧中ArⅡ谱线辐射强度降低同时增强FeⅡ谱线辐射强度；氟化物对不同电弧空间区域的电子温度作用并不一致，其中使阳极区附近电弧温度大幅提升但对其它区域电弧温度的影响很小.Abstract: As one of the most common A-TIG welding activating fluxes, fluorides have been widely used in actual welding production, but its influence mechanism on arc behavior is still controversial. To this end, the spectral diagnosis method was used to study the spatial spectral distribution of the A-TIG welding arc coated with fluoride flux, the distribution characteristics of flux particles, argon and iron particles in the arc space were analyzed, and the Boltzmann diagram method was used to calculate arc electron temperature. The experimental results shown that the flux particles are mainly distributed in the central area of the arc column; fluoride can reduce the intensity of the ArⅡspectrum in the arc and increase the intensity of the FeⅡspectrum; the effect of fluoride on the temperature of different arc regions is not consistent. Among them, the arc temperature near the anode area is greatly increased, but the effect on the arc temperature in other areas is small.
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Keywords:
- A-TIG /
- fluorides /
- spectrum diagnosis /
- arc temperature
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图 1 测量系统及空域扫描示意图
Figure 1. Sensing system and diagram of spectral scanning. (a) sensing system; (b) scanning diagram of spatial domain
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图 2 Ar和Fe离子特征谱线
Figure 2. Characteristic spectral line of Ar and Fe. (a) characteristic spectral line of ArⅡ; (b) characteristic spectral line of FeⅡ
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图 4 ArⅡ和FeⅡ空域分布特征
Figure 4. Spatial characteristics of ArⅡ and FeⅡ. (a) spatial characteristics of ArⅡ; (b) spatial characteristics of ArⅡ
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图 5 电弧电子温度空域分布特征
Figure 5. Spatial characteristics of arc electronic temperature. (a) arc electronic temperature in third layer; (b) arc electronic temperature in second layer; (c) arc electronic temperature in first layer
表 1 焊接参数
Table 1 Experimental weld parameters
焊接电流
I1/A电弧弧长
L/mm焊接速度
v1/(mm·s−1)保护气流量
Q/(L·min−1)100 3 0 10 
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表 2 谱线特征参数
Table 2 characteristic parameter of spectral line
波长
λ/mm特征强度
I跃迁几率
A(107)统计权重
g激发态能量
E/eV458.98 2810 6.64 6 21.127 460.95 3232 7.89 8 21.143 465.79 3030 8.92 2 19.801 472.68 4278 5.80 4 19.762 473.59 4929 5.80 4 19.2611
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