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Journal of KWJS 2010;28(6):28-34.
Published online January 10, 2011.
The Development of Welding Process to Prevent Porosity in MIG Welding of Al 6082-T6
Sang-Yeub Baek, Yon-Ho Jung, Won-Il Kim, Sang-Myung Cho
  This paper was described on investigation to prevent porosity in high speed MIG Welding of Al 6082-T6. Porosity measurement was carried out by using image analysis of micrographs with the help of an analysis software. The main parameter was arc length and torch progressive angle. The porosity ratio was increased as arc length was increased. The arc length was increased depending upon the output voltage. By proper selection of pulse waveform parameter, the stable arc of one pulse one drop was generated. The porosity ratio of optimum condition in one pulse one drop was lower than high voltage condition. When torch progressive angle was an angle of advance 10°, porosity ratio was minium.
Key Words: Pulse GMAW, MIG welding, Aluminium welding, High speed welding, Al6082-T6, Bead on plate, Al-Mg-Si Al alloy, Welding Porosity, Arc length, Arc voltage, Welding speed, Progressive angle, Comparative arc length, Pulse energy, One pulse one drop

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