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Effect of Brazing Condition on Tensile Properties in Brazing Joints of Inconel-625/Ni-201 Using MBF-30

MBF-30을 사용한 Inconel-625/Ni-201 브레이징 접합부의 인장성질에 미치는 접합조건의 영향

  • Yu, Jeong-Woo (National Core Research Center, Pusan National University(NCRC)) ;
  • Park, Sang-Hyun (Dept. of Material Science and Engineering, Pusan National University) ;
  • Kim, Chang-Su (Dong-hwa Entec R&D Center) ;
  • Kang, Chung-Yun (National Core Research Center, Pusan National University(NCRC))
  • 유정우 (부산대학교 하이브리드 소재솔루션 국가핵심연구센터) ;
  • 박상현 (부산대학교 재료공학부) ;
  • 김창수 (동화엔텍 열유체 연구소) ;
  • 강정윤 (부산대학교 하이브리드 소재솔루션 국가핵심연구센터)
  • Received : 2012.11.29
  • Accepted : 2012.12.10
  • Published : 2012.12.31

Abstract

This study was carried out to investigate the effect of bonding temperature and holding time on microstructure and mechanical properties in brazing joints of Ni-base superalloy using MBF-30 (Ni-4.5Si-3.2B [wt.%]). The heating rate was $20^{\circ}C$/min to the bonding temperatures $1050^{\circ}C$, $1070^{\circ}C$, $1090^{\circ}C$ under high vacuum condition. The holding times were 100s, 400s, 900s and 1600s. $Ni_3B$ phases and proeutectic Ni were observed in the interlayer of Ni-201. Then, Ni3B and Ni3Si were found in the middle region of brazing joint. Cr-boride phase appeared in the interlayer of Inconel-625. Tensile strength and elongation were decreased at $1050^{\circ}C$-1600s, $1070^{\circ}C$-900s and $1090^{\circ}C$-400s. After observation the fracture specimens, There was Ni3B which is very brittle phase in the grain boundary of Ni201.

Keywords

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