Journal of Welding and Joining

  • 제35권3호
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  • Pages.52-61
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  • 2017
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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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석출강화형 Ni 기 초내열합금의 천이액상확산접합

Transient Liquid Phase Bonding of Gamma Prime Precipitation Strengthened Ni Based Superalloy

  • 김정길 (두산중공업 신공정기술개발팀) ;
  • 박해지 (두산중공업 신공정기술개발팀) ;
  • 심덕남 (두산중공업 신공정기술개발팀)
  • Kim, Jeong Kil (Advanced Process Development Team, Doosan Heavy Industries & Construction) ;
  • Park, Hae Ji (Advanced Process Development Team, Doosan Heavy Industries & Construction) ;
  • Shim, Deog Nam (Advanced Process Development Team, Doosan Heavy Industries & Construction)
  • 투고 : 2017.02.03
  • 심사 : 2017.03.21
  • 발행 : 2017.06.30
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초록

Transient liquid phase (TLP) bonding is essential technology to repair micro-cracking on the airfoil of blades and vanes for gas turbines. Understanding of the characteristics of TLP bonding of the superalloys is necessary in the application of the technology for repairing these components. In this study, the focus was on investigating TLP bonding characteristics of ${\gamma}^{\prime}$ precipitation strengthened Ni based superalloy. TLP bonding was carried out with an amorphous filler metal in various bonding conditions, and the microstructural characterization was investigated through optical microscopy (OM) and electron probe micro-analysis (EPMA). The experimantal results explained clearly that bonding temperatures had critical effects on the TLP bonding behaviors, and that isothermal solidication of the joints made at higher temperatures than $1170^{\circ}C$ was controlled by Ti diffusion instead of B.

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참고문헌

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