Journal of Welding and Joining

  • 제34권3호
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  • Pages.6-11
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  • 2016
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  • 2466-2232(pISSN)
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  • 2466-2100(eISSN)
대한용접접합학회 (The Korean Welding and Joining Society)
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툴 경로제어를 이용한 Al/Fe 이종금속 마찰교반점용접 공정특성 평가

Effect of Circumferential Tool Path Control on Friction Stir Spot Welding of Al/Fe Dissimilar Metal Joint

  • 윤진영 (한국생산기술연구원 용접접합그룹) ;
  • 김철희 (한국생산기술연구원 용접접합그룹) ;
  • 이세헌 (한양대학교 기계공학부)
  • 투고 : 2016.05.09
  • 심사 : 2016.06.08
  • 발행 : 2016.06.30
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초록

Joining Al/Fe dissimilar metals is becoming a subject of special interest in the assembly of automotive parts as a trade-off between the weight lightening and the cost reduction. Although various studies have been introduced to join Al alloy with the steel sheet by fusion welding, weak joint strength and galvanic corrosion still remained as problems to be solved. As a solid state welding, friction stir welding has been preferred to fusion welding processes in the dissimilar metal joints. This study investigated friction stir spot welding (FSSW) of Al alloy to the thin steel sheet with a thickness of 0.65 mm. The conventional FSSW is a stationary spot welding process but new approach adopted an additional circumferential movement in company with high speed tool rotation. A full factorial experimental design was implemented, and the main and interaction effects of parameters were analysed on the failure load in the tensile shear test. The direction and radius of rotation were statistically significant parameters and these two parameters affected the joint width and the shape of the hook.

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