화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Materials Research, Vol.15, No.6, 399-407, June, 2005
DOI10.3740/MRSK.2005.15.6.399  Export Citation
초내열합금 wide-gap 브레이징부의 미세조직 및 기계적 성질 변화에 미치는 첨가금속분말의 영향
Effect of Additive Powder on Microstructural Evolutions and Mechanical Properties of the Wide-gap Brazed Region in IN738 superalloy
김용환, 권숙인†, 변재원1, 이원식2
  • 고려대학교 신소재 공학과
  • 1고려대학교 공학기술연구소
  • 2한국생산기술연구원 나노소재팀
Y.H. Kim, S.I. Kwun†, J.W. Byeon1, and W.S. Lee2
  • Department of Materials Science and Engineering, Korea University, Seoul 136-701, Korea
  • 1Research Institute of Engineering and Technology, Korea University, Seoul, 136-701, Korea
  • 2Advanced Materials Division, Korea Institute Of Industial Technology, Chnon, 330-825, Korea
E-mail:
The effect of IN738 additive powder on microstructure and mechanical properties of the wide-gap region brazed with BNi-3 filler metal powder was investigated. The wide-gap brazing was conducted in a vacuum of [Math Processing Error] with various powder mixing ratios of additive to filler powders. The microstructures of the wide-gap brazed region were analyzed by SEM and AES. The region brazed with only BNi-3 filler metal powder had a microstructure consisted of proeutectic, binary eutectic and ternary eutectic structure, while that brazed with a mixture of IN738 additive powder and BNi-3 filler metal powder had a microstructure consisted of IN738 additive powder, binary eutectic of [Math Processing Error] solid solution and (Cr, W)B. The fracture strength of the wide-gap brazed region was about 680 MPa regardless of the additive powder mixing ratios. Cracks were initiated at the (Cr, W)B and binary eutectic of [Math Processing Error] solid solution, and propagated through them in the wide-gap brazed region, which lowered the fracture strength of the region.
Keywords:wide-gap brazing;BNi-3 filler metal powder;IN738 additive powder;(Cr;W)B
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