中国激光, 2000, 27 (5): 466, 网络出版: 2006-08-09
YAG脉冲激光焊接的光致等离子体机理研究
Study on Mechanism of Laser-induced Plasma during YAG-pulse Laser Welding
YAG脉冲激光焊接 光致等离子体 空心圆电极探测 伏安特性曲线 等离子体温度 Key words YAG-pulse laser welding laser-induced plasma detecting with hollow cylindrical electrode I-V characteristic curve plasma temperature
摘要
针对YAG脉冲激光焊接Al及45#钢时产生的光致等离子体,采用空心圆电极探测等离子体电信号;建立探测器内等离子体区域分析的理论模型,并用试验加以验证。研究结果表明,在负电压段,等离子体电信号的电流随电压增加呈现饱和趋势;理论与试验曲线比较证明,等离子体温度高于被焊材料气化温度约300 K。
Abstract
A hollow cylindrical electrode was employed to detect the electrical signal of laser-induced plasma during YAG-pulse laser welding of Al and 45# steel. The theoeritical model has been established for analysis of the plasma region and compared with the experiments.The research results show that the current exhibit a saturation effect in the I-V curves of plasma signal with increasing voltage in the negative voltage region, and the plasma temperature is higher than the vaporzation temperature of welded materials.
唐霞辉, 朱海红, 朱国富, 李适民, 李再光. YAG脉冲激光焊接的光致等离子体机理研究[J]. 中国激光, 2000, 27(5): 466. 唐霞辉, 朱海红, 朱国富, 李适民, 李再光. Study on Mechanism of Laser-induced Plasma during YAG-pulse Laser Welding[J]. Chinese Journal of Lasers, 2000, 27(5): 466.