活性剂等离子弧焊焊接电弧的光谱与热分析

针对活性剂等离子弧焊焊接过程，利用光谱分析方法对活性剂等离子弧焊焊接电弧进行光谱分析，采用红外热像伪着色法测定活性剂等离子弧焊焊接电弧温度场，并建立活性剂等离子弧焊焊接电弧热流密度径向分布模型，对焊接电弧的成分及焊接电弧温度场进行了研究。研究结果表明，常规等离子焊焊接电弧以氩原子和氩一次电离离子的谱线为主，金属蒸气谱线不突出，焊接电弧以气体粒子为主，属于气体电弧;活性剂等离子弧焊焊接电弧的光谱中氩原子及氩一次离子谱线的辐射强度增强，Ti，Cr，Fe金属谱线大量涌现;活性剂等离子弧焊焊接电弧的温度分布比较紧凑，温度场外形窄，温度分布范围较集中，电弧径向温度梯度较大;电弧径向温度分布呈现正态Gauss分布模式。

Spectra and Thermal Analysis of the Arc in Activating Flux Plasma Arc Welding

In activating flux plasma arc welding the welding arc was analyzed by spectra analysis technique, and the welding arc temperature field was measured by the infrared sensing and computer image technique. The distribution models of welding arc heat flow density of activating flux PAW welding were developed. The composition of welding are affected by activated flux was studied, and the welding arc temperature field was studied. The results show that the spectral lines of argon atom and ionized ar-gon atom of primary ionization are the main spectra lines of the conventional plasma welding arc. The spectra lines of weld metal are inappreciable in the spectra lines of the conventional plasma welding arc. The gas particle is the main in the conventional plas-ma welding arc. The conventional plasma welding arc is gas welding arc. The spectra lines of argon atom and ionized argon atom of primary ionization are intensified in the activating flux plasma welding are, and the spectra lines of Ti, Cr and Fe elements are found in the activating flux plasma welding arc. The welding arc temperature distribution in activating flux plasma are welding is compact, the outline of the welding arc temperature field is narrow, the range of the welding arc temperature distribution is con-centrated, the welding arc radial temperature gradient is large, and the welding arc radial temperature gradient shows normal Gauss distribution.