Plasma Temperature Calculation and Coupling Mechanism Analysis of Laser-Double Wire Hybrid Welding
ZHENG Kai1, LI Huan1, YANG Li-jun1*, GU Xiao-yan1, GAO Ying2
1. Tianjin Key Laboratory of Advanced Joining Technology，Tianjin University，Tianjin 300072，China 2. Tianjin Key Laboratory of High Speed Cutting and Precision Machining，Tianjin University of Technology and Education，Tianjin 300222，China
Abstract：The plasma radiation of laser-double wire hybrid welding was collected by using fiber spectrometer, the coupling mechanism of arc with laser was studied through high-speed photography during welding process, and the temperature of hybrid plasma was calculated by using the method of Boltzmann plot. The results indicated that with laser hybrid, luminance was enhanced; radiation intensity became stronger; arc was attracted to the laser point; cross section contracted and arc was more stable. The laser power, welding current and arc-arc distance are important factors that have great influence on electron temperature. Increase in the laser power, amplification of welding current and reduction of arc-arc distance can all result in the rise of temperature.
Key words：Laser-double wire pulsed MIG;Arc shape;Arc plasma;Electron temperature
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