激光冷却电弧效应

urrently, interaction between laser and plasma is one of the Subject frontiers and hot issues. In this paper, combining numerical simulation and experimental methods, the interactive behaviors between laser and arc in the laser-arc hybrid welding process were deeply investigated. It was found that during the welding process, the hybrid plasma (the mixture of arc plasma and metallic vapor) was not stable but in a state of periodic oscillation. The arc right above and behind the laser action spot was cooled with a temperature falling of more than 5000 K. The energy input to the weld specimen in the hybrid welding was less than the sum energy input of the single laser welding and single arc welding. The results showed that these effects in laser-arc hybrid welding were the results of interactions between the arc plasma and the Laser Cooling Arc Effectlaser induced metallic vapor. In a word, these findings can further rich the interactive theory between laser and plasma.