WC particulate reinforced joint by ultrasonic-associated brazing of WC-Co/35CrMo

[Display omitted] During the hybrid ultrasonic frequency induction brazing of tungsten carbide-cobalt/35CrMo (WC-Co/35CrMo) steel, a Ag-Cu-Zn-Mn-Ni metal was utilized as a filler metal, the vibration frequency was 21kHz, and the brazing temperature was varied from 710°C to 820°C. WC particles disper...

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Bibliographic Details
Published in:Journal of materials processing technology 2016-12, Vol.238, p.15-21
Main Authors: Li, Yuanxing, Zhu, Zongtao, He, Yongpan, Chen, Hui, Jiang, Chao, Han, Dengquan, Li, Junfu
Format: Article
Language:English
Subjects:
Cemented carbides
Migrating model
Ultrasonic frequency induction brazing
WC particulate reinforced bond
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Summary:[Display omitted] During the hybrid ultrasonic frequency induction brazing of tungsten carbide-cobalt/35CrMo (WC-Co/35CrMo) steel, a Ag-Cu-Zn-Mn-Ni metal was utilized as a filler metal, the vibration frequency was 21kHz, and the brazing temperature was varied from 710°C to 820°C. WC particles dispersed in the bond with the ultrasonic vibration, which phenomenon did not occur during traditional brazing processes. Based on the evolution of the microstructure of the WC particles in bonds formed at different ultrasonic times, the dissolution behavior of cobalt (Co) in Ag-based filler metal was investigated. A migration model of WC particles into the bonds was proposed that enables the control of the extent of reinforcing WC particles. Compared with conventional frequency induction brazing, WC particles in the bond via this ultrasonic-assisted brazing technique strengthened the joints significantly, resulting in a shear strength increase of 17% (approximately 408MPa).
ISSN:0924-0136
DOI:10.1016/j.jmatprotec.2016.06.037