Proceedings of the KWS Conference (대한용접접합학회:학술대회논문집)
- 2002.10a
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- Pages.89-93
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- 2002
STUDY ON HIGH SPEED WELDING IN GTA WELDING PROCESS
- Cui Li (Graduate School, Pukyong National University) ;
- Jeong, Ho-Shin (Division of Materials Science & Engineering, Pukyong National University) ;
- Park, Byung-Il (Institute of Energy Lab., Kyungdong Boiler) ;
- Kim, Sung-Kab (Institute of Energy Lab., Kyungdong Boiler)
- Published : 2002.10.01
Abstract
A study of noticeable improvement in welding speed in thin-plate Type 304 stainless steels gas tungsten arc (GTA) welding was investigated. The welding speeds were increased to more than 3m/min, up to 8m/min. During the welding, Direct Current Straight Polarity (DCSP) and pulsed current GTA welding processes were carried out, respectively. The appropriate high speed welding parameters were established while achieving a high quality weld. After this, Erichsen test and tensile test were performed. The results obtained wert summarized as following: ultra high speed welding for thin-plate Type 304 could be satisfactorily welded with high speed from 3m/min to 8m/min in both DCSP and pulsed GTA welding; Increasing welding speed was found to decrease the ductility, tensile strength md elongation of welded joint; The optimal frequency would be 200Hz-500Hz for high speed welding in pulsed current welding; DCSP welding could obtain the better results of Erichsen test and tensile test than those of pulsed current welding obtained.