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Based on hyperbaric gas metal arc welding (GMAW) experiments at ambient pressure of 0. 8 MPa, the process stability of different welding voltages was studied. The experiments were carried out with a high speed camer...
Acknowledgement The authors are grateful to the financial support for this project from the Science and Technology Project of Beijing Municipal Edu- cation Commission under grant No. KM201110017005, from Nation- al Natural Science Foundation of China under grant No. 51275051 and from CNPC Research Institute of Engineering Technology.
Gas metal arc ( GMA ) welding process can be fluently executed under the range of 0. 1 - 0. 7 MPa air pressure shielded by C02 and ArS0% + CO220% gases, which were tested by the igniting and exploding experiments u...
Acknowledgement The authors wish to thank the financial support for this research from the National High Technology Research and Development Program of China (863 Program) (Grant No. 2002AA602012) and the National Natural Science Foundation of China (Grant No. 40776054).
The arc spectrum of TIG welding in high pressure was analyzed by Stark broadening. Using the characteristic line of Arl in welding arc, a study of electron density in high pressure revealed that the electron density o...