高电压技术2013，Vol.39Issue(7)：1661-1667,7.DOI:10.3969/j.issn.1003-6520.2013.07.018
激光诱导增强电弧等离子体的放电状态研究
Discharge State of Laser Induced and Enhanced Arc Plasma
摘要
Abstract
By using the high speed observation and spectral diagnosis,we compared and analyzed the welding penetration depth,plasma behavior,and plasma spectral feature of magnesium alloy during laser-arc hybrid welding,for understanding the characteristics of arc plasma in the welding process.Results show that there are three kinds of laser-arc combination styles,i.e.arc root separating from laser keyhole when laser beam does not pass through the arc plasma,arc root separating from laser keyhole when laser beam passes through the arc plasma,and the root of arc plasma right on the laser keyhole.When arc plasma roots the laser keyhole,it connects with the keyhole plasma,and a hybrid discharge happens.The keyhole part of the hybrid plasma possesses extreme electric conductivity as high as 1.2 × 104 S/m and approaches thermal equilibrium state,resulting in the fact that the laser induced and enhanced arc plasma has high electric current density (approximately 103 A/cm2) and energy utilization.关键词
电弧等离子体/激光/匙孔/复合放电/电导率/热力学平衡Key words
arc plasma/laser/keyhole/combined discharge/electric conductivity/thermal equilibrium引用本文复制引用
陈明华,李陈宾,刘黎明..激光诱导增强电弧等离子体的放电状态研究[J].高电压技术,2013,39(7):1661-1667,7.基金项目
长江学者和创新团队发展计划(IRT1008) （IRT1008）
国家杰出青年科学基金(51025520) （51025520）
Project supported by Program for Changjiang Scholars and Innovative Research Team in University(IRT1008),National Natural Science Fund for Distinguished Young Scholar (51025520). （IRT1008）
