Ni기 삽입금속에 의해 진공 브레이징된 stainless steel의 특성평가

장세훈; 홍지민; 정창열; 최세원; 오익현; Se-Hun Chang; Ji-Min Hong; Chang-Yeol Jeong; Se-Weon Choi; Ik-Hyun Oh

Korean Journal of Materials Research, Vol.17, No.6, 342-346, June, 2007

DOI10.3740/MRSK.2007.17.6.342 Export Citation

Ni기 삽입금속에 의해 진공 브레이징된 stainless steel의 특성평가

Evaluation of the Vacuum brazed stainless steel by Ni-based filler metals

장세훈, 홍지민, 정창열, 최세원, 오익현^†

한국생산기술연구원 광주연구센터

Se-Hun Chang, Ji-Min Hong, Chang-Yeol Jeong, Se-Weon Choi, and Ik-Hyun Oh^†

Gwangju Research Center, Korea Institute of Indutrial Technology(KITECH), Gwangju, 500-480, Korea

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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 . 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.

Keywords:ensile strength;intermetallic compound;BNi filler metal;stainless steel

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[7] Brazing Manual, A. W. S, Inc., (1976) (1976)

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[9] Kang JY, Kim UY, J. KWS, 10(2), 11 (1992)