Journal of Welding and Joining

  • 제32권6호
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  • Pages.56-63
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  • 2014
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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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싱글모드 파이버 레이저를 이용한 SUS304와 Cu의 고속 겹치기 용접에서 접합부 및 인장시험 파단부의 특성에 관한 연구

A Study on the Characteristic of Weld Joint and Tensile Fracture of SUS304 and Cu High-Speed Dissimilar Lap Welds by Single Mode Fiber Laser

  • Lee, Su-Jin (Joining and Welding Research Institute, Osaka University) ;
  • Kim, Jong-Do (Division of Marine Engineering, Korea Maritime and Ocean University) ;
  • Katayama, Seiji (Joining and Welding Research Institute, Osaka University)
  • 투고 : 2014.11.16
  • 심사 : 2014.12.30
  • 발행 : 2014.12.31
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초록

To develop and understand dissimilar metals joining of Stainless steel and Copper, ultra-high speed laser lap welding was studied using single mode fiber laser in this study. SUS304 and Cu have large differences in materials properties, and Cu and Fe have no intermetallic compounds by typical binary phase of Cu and Fe system. In this study, ultra-high speed lap welds of SUS304 and Cu dissimilar metals using single-mode fiber laser was generated, and weldability of the weld fusion zone was evaluated using a tensile shear test. To understand the phenomenon of tensile shear load, weld fusion zone of interface weld area and fracture parts after tensile shear test were observed using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) analysis system. And it was confirmed that Cu was easily melting and penetrating in the grain boundaries of SUS304 because of low melting temperature. And high thermal conductivity of copper occurred dissipate heat energy rapidly. These properties cause the solidification cracking in weld zone.

키워드

참고문헌

  1. S.J. Lee, H. Nakamura, Y. Kawahito and Seiji Katayama: Effect of welding speed on microstructural and mechanical properties of laser lap weld joints in dissimilar Al and Cu sheets, Science and Technology of Welding and Joining, 19-2 (2014), 111-118 https://doi.org/10.1179/1362171813Y.0000000168
  2. Su-Jin Lee, Seiji Katayama and Jong-Do Kim: Microstructural behavior on weld fusion zone of Al-Ti and Ti-Al dissimilar lap welding using single-mode fiber laser, Journal of Korean Society of Marine Engineering, 38-2 (2014), 133-139 https://doi.org/10.5916/jkosme.2014.38.2.133
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