| YAG脉冲激光焊接的光致等离子体机理研究 |
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| 引用本文： | 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):466-470. |
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| 作者姓名： | 唐霞辉 朱海红 朱国富 李适民 李再光 |
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| 作者单位： | 华中理工大学激光加工国家工程研究中心,武汉,430074 |
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| 摘 要： | 针对 YAG脉冲激光焊接 Al及 4 5#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 30 0 K。
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| 关 键 词： | 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 |
| 收稿时间： | 1998/11/6 |
Study on Mechanism of Laser-induced Plasma during YAG-pulse Laser Welding |
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| Tang Xiahui,Zhu Haihong,Zhu Guofu,Li Shimin,Li Zaiguang.Study on Mechanism of Laser-induced Plasma during YAG-pulse Laser Welding[J].Chinese Journal of Lasers,2000,27(5):466-470. |
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| Authors: | Tang Xiahui Zhu Haihong Zhu Guofu Li Shimin Li Zaiguang |
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| 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. |
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| Keywords: | YAG pulse laser welding laser induced plasma detecting with hollow cylindrical electrode I V characteristic curve plasma temperature |
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