Impact of Introduction of O2 on the Welding Arc of Gas Pool Coupled Activating TIG
HUANG Yong1, 2，WANG Yan-lei2，ZHANG Zhi-guo2
1. State Key Laboratory of Gansu Advanced Non-Ferrous Metal Materials，Lanzhou University of Technology，Lanzhou 730050，China 2. Key Laboratory of Non-ferrous Metal Alloys and Processing，Ministry of Education，Lanzhou University of Technology，Lanzhou 730050，China
Abstract：In the present paper, Boltzmann plot method was applied to analyze the temperature distributions of the arc plasma when the gas pool coupled activating TIG welding was at different coupling degrees with the outer gas being O2. Based on this study of temperature distributions, the changing regularities of arc voltage and arc appearance were studied. The result shows that compared with traditional TIG welding, the introduction of O2 makes the welding arc constricted slightly, the temperature of the arc center build up, and the arc voltage increase. When argon being the inner gas, oxygen serving as the outer gas instead of argon makes the arc constricted more obviously. When the coupling degree increases from 0 to 2, the temperature of the arc center and the arc voltage both increase slightly. In the gas pool coupled activating TIG welding the arc is constricted not obviously, and the reason why the weld penetration is improved dramatically in the welding of stainless steel is not arc constriction.
Key words：Gas pool coupled activating TIG;Boltzmann plot method;Oxygen;Temperature distributions;Arc;Arc voltage
黄 勇1, 2，王艳磊2，张治国2 . 氧引入对气体熔池耦合活性TIG焊电弧的影响 [J]. 光谱学与光谱分析, 2014, 34(05): 1168-1172.
HUANG Yong1, 2，WANG Yan-lei2，ZHANG Zhi-guo2 . Impact of Introduction of O2 on the Welding Arc of Gas Pool Coupled Activating TIG. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(05): 1168-1172.
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