A Theoretical Model of Arc Light Radiation Based on GTA Spectral Diagnosis

查看全文 作　　者：Chenming XU Hongming GAO Guangjun ZHANG Lin [1]WU 机构地区：[1]State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001 China State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001 China State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001 China State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001 China 出　　处：《Journal of Materials Science & Technology》索引2003年第19卷第z1期,共2页 摘　　要：An arc light radiation phenomenon in TIG welding process was studied through experiments and theoretical analysis.The arc spectra were acquired under a variety of welding parameters from 200 nm to 1000 nm wavelength rangein TIG. The influence of welding parameters on the arc radiation was discussed. The radiation energy from linesemission mechanisms was calculated and the comparison was made with the one from the continuum emissionmechanisms. The result shows that the radiation energy from the line emission mechanisms is equal to the one fromthe background. Based on the experiments and analysis, a physical model of arc light radiation has been developed.In this model. the arc plasma was presumed to be in local thermal equilibrium (LTE) with light thinness property.The Bolzmann distribution and Saha equation were applied to establish the arc light radiation model. This helps laythe foundation for further mathematical modeling of the arc light radiation. 关 键 词：SPECTRAL diagnosis, ARC LIGHT radiation, THEORETICAL model, TIG