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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 4    August 2006

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Simulation on temperature field of TIG welding of copper without preheating
LEI Yu-cheng(雷玉成), YU Wen-xia(郁雯霞),
LI Cai-hui(李彩辉), CHENG Xiao-nong(程晓农)

School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China

Abstract: According to the conservation of energy principle and technology characteristics of tungsten inert gas(TIG), a model of non-steady three-dimensional temperature field for red copper’s TIG welding with a locomotive arc was established. The temperature field of welding pool was calculated with finite element software ANSYS. Indrafted the heat enthalpy conception and the surface distribution dual-ellipsoid model, the demands of welding numerical simulation was primely satisfied. Aimed at bad weldability of red copper, the TIG welding of thick-wall red copper was studied adopting Ar+N2 without preheating. The results show that the heating effect of arc is evidently enhanced, it is viable to achieve the no preheating TIG welding of red copper. Comparing the experimental values with the calculated ones under different technological parameters, the results indicate that the model and practical course are well matched, which proves that the model is reliable and correct.

 

Key words: copper; TIG welding; temperature field; simulation

ISSN 1672-7029
CN 43-1423/U

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