Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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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
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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

References

  1. C.F. McDonald, Gas turbine recuperator technology advancements, ASME, 1972, 72-GT-32
  2. C.F. McDonald, Gas turbine recuperator technology advancements, in: Proceedings of Institute of Metals Conference on Heat Exchanger Materials, UK, 1995, 337-369
  3. Y. W. Lee, J. H. Kim, Influence of Brazing Temperature on Strength and Structure of SUS304 Stainless Steel Brazed System with BNi-2 Filler Metal, Kor. J. Mater. Res, 17-3 (2007)
  4. M. D. Bellware, Welding J, 37, 683 (1958)
  5. A. Rabinkin, E. Wenski and A. Ribaudo, Welding J, 77(2) 66 (1998)
  6. J.R. Davis: ASM Handbook, Vol. 2: Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM International, Materials Park, OH, 1990, 428-5
  7. W.F. Smith: Structure and Properties of Engineering Alloys, McGraw-Hill Inc., New York, NY, 1993, 494-8
  8. K. H. Kim, Effect of Brazing Temperature and Homogenizing Time to Joining Characteristics of Ni-based Superalloys, Proceedings of KWS, 46 (2006), 266-268 (in Korean)
  9. C. B. ALCOCK, M. G. HOCKING and S. ZADOR, THE CORROSION OF Ni IN O2+SO2 ATMOSPHERES IN THE TEMPERATURE RANGE 500-750${^{\circ}C}$, Corrosion Science, 1969. 9, 111-122 https://doi.org/10.1016/S0010-938X(69)80047-8
  10. C. L. OU, R. K. SHIUE, Microstructural evolution of brazing 422 stainless steel using the BNi-3 braze alloy, JOURNAL OF MATERIALS SCIENCE 38 (2003) 2337-2346 https://doi.org/10.1023/A:1023928312572
  11. C.Y. Kang, D.U. Kim, S.H. Kim, I.S. Woo, Brazing Technology of Aircraft and Aerospace Equipments, Journal of KWS, 17-2 (1999), 1-8 (in Korean)
  12. C.Y. Kang, H.C. Hwang, I.B. Kim, D,U. Kim, I.S. Woo, Transient Liquid Phase Bonding of Directionally Solidified Ni Base Superalloy, Journal of KWS, 21-3 (2003), 78-84 (in Korean)
  13. H.S. Ryu, Transaction of the KSME, 35(9), 794 (1995)
  14. Wenchun Jiang, Effect of brazing temperature on tensile strength and microstructure for a stainless steel plate-fin structure, Materials and Design 32 (2011) 736-742 https://doi.org/10.1016/j.matdes.2010.07.032
  15. Wen-shiang chen, Brazing Inconel625 Using Two Ni/(Fe)-Based Amorphous Filler Foils, Metallugical and materials transaction A, 43A (2012) 2177-2182