Journal of Welding and Joining

  • 제19권6호
  • /
  • Pages.614-621
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  • 2001
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  • 2466-2232(pISSN)
  • /
  • 2466-2100(eISSN)
대한용접접합학회 (The Korean Welding and Joining Society)
권호 표지

Ni기 초내열합금 용접부의 고온균열에 관한 연구(I) - 용접금속의 응고균열 감수성에 미치는 Fe의 영향 -

A Study on Hot Cracking in Ni-Base Superalloy Welds (I) - Effect of Fe Contents on Solidification Cracking Susceptibility in Weld Metal -

  • 우인수 (대판대학 용접과학연구소) ;
  • 강정윤 (부산대학교 금속공학과) ;
  • 발행 : 2001.12.01
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초록

A study was carried out to determine the solidification cracking susceptibility of Ni-base superalloy as a function of Fe content in base metal. Three kinds of Ni-base superalloys with three different levels of Fe content were used. The solidification cracking susceptibility was evaluated by the Trans-Varestraint test at four different strain levels. Quantitative analysis of crack revealed that the solidification crack length and the temperature range in which hot cracking occurred in fusion zone (Brittle Temperature Range, BTR) decreased with a decrease in Fe content. Further, the thermo-calc data indicated that the solidification temperature range also decreased with decreasing Fe content. From these results, it was deduced that the improvement of the solidification cracking susceptibility with decreasing Fe content was attributed to the decrease of the solidification temperature range.

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참고문헌

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