Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Evaluation of the Vacuum brazed stainless steel by Ni-based filler metals

Ni기 삽입금속에 의해 진공 브레이징된 stainless steel의 특성평가

  • Chang, Se-Hun (Korea Institute of Industrial Technology(KITECH), Gwangju Research Center) ;
  • Hong, Ji-Min (Korea Institute of Industrial Technology(KITECH), Gwangju Research Center) ;
  • Jeong, Chang-Yeol (Korea Institute of Industrial Technology(KITECH), Gwangju Research Center) ;
  • Choi, Se-Weon (Korea Institute of Industrial Technology(KITECH), Gwangju Research Center) ;
  • Oh, Ik-Hyun (Korea Institute of Industrial Technology(KITECH), Gwangju Research Center)
  • 장세훈 (한국생산기술연구원 광주연구센터) ;
  • 홍지민 (한국생산기술연구원 광주연구센터) ;
  • 정창열 (한국생산기술연구원 광주연구센터) ;
  • 최세원 (한국생산기술연구원 광주연구센터) ;
  • 오익현 (한국생산기술연구원 광주연구센터)
  • Published : 2007.06.27
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Abstract

Microstructure and tensile strength of the vacuum brazed stainless steel were investigated in this study. For vacuum brazing of the stainless steel 303 and 304, the BNi-2, 3, 4 and 7 were used as filler metals. Among these filler metals, the BNi-2 showed excellent wettability at $1050^{\circ}C$. Indeed, the brazed stainless steel using the BNi-2 showed the highest tensile strength (483 MPa) among all brazed specimens. This is attributed to degree of interfacial reaction between the filler metal and stainless steel. Brazed stainless steel with BNi-2, 3 filler metals showed almost elastic deformation followed by plastic yielding and strain hardening up to a peak stress. On the other hand, it is likely that the fracture of the brazed specimens with BNi-4, 7 was occurred in elastic range without plastic yielding up to a peak stress.

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References

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