Transactions of the Korean Society of Pressure Vessels and Piping (한국압력기기공학회 논문집)

Korean Society of Pressure Vessels and Piping (한국압력기기공학회)
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Process Development of Laser Cladding for Weld Inlay Repair of Dissimilar Metal Weld in Reactor Vessel In/Outlet Nozzles

원자로 입출구 노즐 이종금속 용접부 Weld Inlay 레이저 클래딩 공정 개발

  • 조홍석 (한전KPS(주) 기술연구원 기계재료연구실) ;
  • 정광운 (한전KPS(주) 기술연구원 기계재료연구실) ;
  • 모민환 (한전KPS(주) 기술연구원 기계재료연구실) ;
  • 조기현 (한전KPS(주) 기술연구원 기계재료연구실) ;
  • 최동철 (한전KPS(주) 기술연구원 기계재료연구실) ;
  • 이장욱 (한전KPS(주) 기술연구원 기계재료연구실) ;
  • 조상범 (한전KPS(주) 기술연구원 기계재료연구실)
  • Received : 2015.06.12
  • Accepted : 2015.06.30
  • Published : 2015.06.30
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Abstract

This study was investigated to develop process technology of laser cladding with austenite stainless steel for Weld Inlay repair of dissimilar metal weld in reactor vessel in/outlet nozzles. Weld Inlay experiments were performed by laser cladding repair system consisting of common manipulator, laser apparatus and welding process scheduler, etc. Single pass welding experiments were conducted in order to obtain the optimum welding process parameters for filler wires of ER309L and Alloy 52M before multi-layer laser cladding. Based on the above obtained results, multi-layer laser cladding experiments were carried out, and welding qualities for weld specimens were estimated by PT, OM, SEM and EDS analysis. Consequently, it was revealed that multi-layer laser cladding on austenite stainless steel using filler wires of ER309L and Alloy 52M could be possible to meet ASME Code standard without any weld defect.

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References

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