JWJ > Volume 25(5); 2007 > Article
Journal of KWJS 2007 October;25(5) :64-71.
Published online December 3, 2007.
The Effects of Welding Parameters on the Weld Shape in Pulsed GTA Welding of a STS304L Stainless Steel Capsule
HyoungKeun Lee, HyonSoo Han, KwangJae Son


Correspondence:   Published online December 3, 2007
ABSTRACT
  The aim of this paper is to investigate the effects of welding parameters on the weld shape in seal-welding of STS304L capsule for manufacturing a radioisotope source which is widely used in nondestructive testing of metal structures using gamma ray. Pulsed gas tungsten arc (Pulsed GTA) welding is performed for thin cross sectional area of the capsule. Seven welding parameters including current waveform parameters and arc length etc. are selected as main process parameters using design of experiment. The weld shape such as bead width, penetration depth, weld area, aspect ratio and area rate is investigated to assess the effects of welding parameters. As results, the combination of pulse duty/welding speed largely affects on bead width, penetration depth, area and aspect ratio. Finally, it is concluded that the key parameters are the combination of pulse duty/welding speed, base current and arc length, and their optimal conditions are 50%/1.77㎜/s, 6.4A and 1 ㎜.
Keywords: STS304L stainless steel;Pulsed GTA welding;Welding parameters;Weld penetration;Aspect ratio;Optimization
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