Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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TIG Welding Characteristics of Stainless Steel by Design of Experiment

실험계획법에 의한 스테인레스강의 TIG용접특성

  • Chung, Joong Gyo (Department of Mechanical Engineering, Pukyong National University) ;
  • Park, Kyoung Do (Department of Mechanical Engineering, Pukyong National University) ;
  • Kang, Dae Min (Department of Mechanical Engineering, Pukyong National University)
  • 정중교 (부경대학교 기계공학과 대학원) ;
  • 박경도 (부경대학교 기계공학과 대학원) ;
  • 강대민 (부경대학교 기계공학과)
  • Received : 2014.02.27
  • Accepted : 2014.05.14
  • Published : 2014.06.30
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Abstract

Welding is very popular method for joining two or more metals. However, welding causes residual stress and distortion and these give a bad influence to the structure strength. In this paper, TIG welding technique was performed to investigate the joint characteristics of AISI321 steel. For its evaluation, the orthogonal array method and variance analysis were applied with three factors of electric current, travel speed and argon gas and also three levels of each factor to tensile tests for optimum design. From the results, the increaser weld speed the narrower bead width and the lower weld penetration. The increaser electric current the brighter argon gas and the wider bead width. Also weld speed influenced most on the tensile strength and presumption range of tensile strength at optimal condition from reliability 95% was estimated to $635.02{\pm}14.64$. In addition the increaser weld speed and electric current the fracture occurred around bead vicinity.

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References

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