Welding Arc Temperature Field Measurements Based on Boltzmann Spectrometry
SI Hong1,2, HUA Xue-ming1,2*, ZHANG Wang1,2, LI Fang1,2, XIAO Xiao1,2
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 200240, China
Abstract：Arc plasma, as non-uniform plasma, has complicated energy and mass transport processes in its internal, so plasma temperature measurement is of great significance. Compared with absolute spectral line intensity method and standard temperature method, Boltzmann plot measuring is more accurate and convenient. Based on the Boltzmann theory, the present paper calculates the temperature distribution of the plasma and analyzes the principle of lines selection by real time scanning the space of the TIG arc measurements.
Key words：Welding arc plasma;Boltzmann plot method;Temperature field
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