Abstract
Graphite was successfully brazed to TZM alloy using the Ti-56Ni, Ti-8.5Si, Ti-33Cr and Ti-30V-3Mo brazing filler materials, respectively, and the corresponding brazing temperatures ranged from 1300 to 1700 °C. The results show that the microstructure of TZM/graphite braze metal was composed of NiTi and Ni3Ti compounds when using Ti-56Ni brazing filler, and the discontinuous TiC compounds were found at the Ti-56Ni/graphite side. When using the Ti-8.5Si, Ti-33Cr and Ti-30V-Mo brazing fillers, the metallurgical combination was obtained due to the formation of the Ti-Mo solid solution at the TZM/brazing filler side and the TiC reaction layer at the graphite/brazing filler side. The fracture was occurred at the interface of TiC/graphite during shear test, which indicated the poorer bonding strength between the graphite and granular TiC.
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Funding
This work is supported by Zhongyuan High Level Talents Special Support Plan (Grant No. 204200510031), and Zhengzhou Major Science and Technology Innovation Special Project (Grant No. 2019CXZX0065), and Open Fund of National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials (Grant No. HKDNM2019011).
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Lu, Q., Long, W., Zhong, S. et al. TZM/graphite interface behavior in high-temperature brazing by Ti-based brazing filler materials. Weld World 64, 1877–1885 (2020). https://doi.org/10.1007/s40194-020-00967-3
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DOI: https://doi.org/10.1007/s40194-020-00967-3