| 光谱学与光谱分析 |
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| Study of the Effect of Heat Source Separation Distance on Plasma Physical Properties in Laser-Pulsed GMAW Hybrid Welding Based on Spectral Diagnosis Technique |
| LIAO Wei1,2, HUA Xue-ming1,2*, ZHANG Wang1,2, LI Fang1,2 |
1. Welding Engineering Technology Research Institute, School of Materials Science and Engineering，Shanghai Jiaotong University, Shanghai 200240, China
2. Shanghai Key Laboratory of Materials Laser Processing and Modification，Shanghai Jiaotong University, Shanghai 200240, China |
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Abstract In the present paper, the authors calculated the plasma’s peak electron temperatures under different heat source separation distance in laser- pulse GMAW hybrid welding based on Boltzmann spectrometry. Plasma’s peak electron densities under the corresponding conditions were also calculated by using the Stark width of the plasma spectrum. Combined with high-speed photography，the effect of heat source separation distance on electron temperature and electron density was studied. The results show that with the increase in heat source separation distance, the electron temperatures and electron densities of laser plasma did not changed significantly. However, the electron temperatures of arc plasma decreased, and the electron densities of arc plasma first increased and then decreased.
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Received: 2013-07-06
Accepted: 2013-10-25
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Corresponding Authors:
HUA Xue-ming
E-mail: xmhua@sjtu.edu.cn
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