摘要
在CO2激光垂直穿过TIG电弧条件下,对激光作用电弧前、后的电弧等离子体局部光谱特征进行了分析,并采用波尔兹曼图法计算了电弧局部电子温度,研究了激光对电弧等离子体轴向温度分布影响的基本规律.结果表明,激光作用电弧后,电弧等离子体的光谱特征保持不变,但整体辐射强度增加;从激光作用位置到阳极区间的电弧温度升高,而靠近阴极处的电弧温度基本保持不变;一定功率的激光束作用TIG电弧不同位置时,其作用位置处的电弧温度基本相当,这是由于电弧等离子体仅提供初始电子,而激光束是影响相互作用后电弧温度的主要因素.
In order to understand the effects of a vertically incident CO2 laser beam on the tungsten-inert gas(TIG) arc characteristics,the spectra of the arc plasma with the action of a vertically incident laser beam are analyzed.The electron temperature of the arc plasma is calculated by the boltzmann plot method.The results show that the electron temperature of the arc plasma with the action of CO2 laser beam radiation is increased between the laser acting position and anode zone.The influences of laser power,arc current and laser acted position on electron temperature are also studied.The charges in electron temperature indicate that the inverse bremsstrahlung absorption of laser energy is the dominant factor influencing the electron temperature of TIG arc plasma with the action of CO2 laser beam.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2011年第2期101-104,118,共4页
Transactions of The China Welding Institution
基金
北京市教委科技发展计划基金资助项目(KZ200710005003)
关键词
激光
电弧
光谱分析
电弧温度
逆韧致辐射吸收
CO2 laser
TIG arc
spectral diagnosis
electron temperature
inverse bremsstrahlung absorption
