氮氧元素联合过渡对气体熔池耦合活性TIG焊电弧的影响

针对外层引入氮氧混合气体的气体熔池耦合活性TIG焊电弧,采用Boltzmann作图法分析在不同耦合度下电弧等离子体的温度分布和电弧电压的变化规律,并与传统TIG焊及外层只引入氧气的气体熔池耦合活性TIG焊进行比较. 结果表明,氮氧联合过渡时气体熔池耦合活性TIG焊电弧的中心区域温度和电弧电压均高于传统TIG焊与外层只引入氧气时的气体熔池耦合活性TIG焊的数值;当耦合度由0变为+2时,电弧中心区域温度与电弧电压均略有升高.

Effect of and oxygen on welding arc of gas pool coupled activating TIG

As to the gas pool coupled activating TIG arc with the outer gas being the mixture of nitrogen and oxygen, Boltzmann plot method was applied to analyze the temperature distributions of the arc plasma and the regularity for change of the arc voltage when they were under different coupling degrees, and then the results were compared with the traditional TIG arc and the gas pool coupled activating TIG arc only using oxygen as the outer gas, respectively. The results show that both the plasma temperature of central zone and the arc voltage of the gas pool coupled activating TIG arc with the outer gas being the mixture of nitrogen and oxygen are higher than those of the TIG arc and gas pool coupled activating TIG arc with oxygen being introduced only. When the coupling degree h is changed from 0 to +2, both the arc plasma temperature of central zone and arc voltage are increased slightly.