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| Brazing of Ti(C,N) Cermet and 17–4PH Precipitation–hardened Stainless Steel by Nickel–based Filler Metal BNi–7 |
| WANG Fengzhen, WANG Quanzhao, YU Baohai, XIAO Bolv, MA Zongyi |
| Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 |
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Cite this article:
WANG Fengzhen WANG Quanzhao YU Baohai XIAO Bolv MA Zongyi. Brazing of Ti(C,N) Cermet and 17–4PH Precipitation–hardened Stainless Steel by Nickel–based Filler Metal BNi–7. Chin J Mater Res, 2011, 25(6): 573-578.
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Abstract The Ti(C,N) cermet and 17–4PH precipitation–hardened stainless steel were brazed in vacuum using nickel–based eutectic filler BNi–7. The effects of brazing temperature and brazing seam thickness on the microstructure and shear strength of the brazed joints were investigated. BNi–7 filler had a strong dissolution ability to the binder of the Ti(C,N) cermet. This is beneficial to the wide distribution of melting point depressant (phosphorous) in the Ti(C,N) cermet side and producing a good interfacial bonding. The distribution zone of phosphorous in the Ti(C,N) cermet side that is adjacent to the brazing seam increased as the brazing temperature rose. A maximum shear strength of 454 MPa was achieved at a brazing temperature of 1100 oC and a brazing time of 60 min with a brazing seam thickness of 50μm.
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Received: 11 April 2011
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