Effect of BAg1 Ni-Electroplating on microstructure and properties of WC-Co-brazed joints
Authors:
- 31 July 2017
- journal article
- research article
- Published by SAGE Publications in Materials Science and Technology
- Vol. 33 (17) , 2110-2119
Abstract
Excellent strength, joining effectiveness and low cost of brazing make it one of the most favoured methods for hard metals attachments. In this study, WC-Co, as a hard metal, was furnace-brazed by BAg1 (Ag–Cu–Zn–Cd) filler alloy and Ni-electroplated BAg1, and the influence of Ni-electroplating in joint properties was thoroughly studied. The brazing process was carried out using a tube furnace, at 670°C/15 min. The characteristics and microstructure of joints were studied by scanning electron microscope, energy-dispersive spectrometer and XRD. It was revealed that Ni coating of BAg1 represents 20% increase in wettability and approximately 15% increase in shear strength (from 107.98 to 124.17 MPa) by the formation of soft and semi-active NiZn phase and by the substitution of some of brittle TiC phase with NiTi phase.Keywords
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