Effect of BAg1 Ni-Electroplating on microstructure and properties of WC-Co-brazed joints
| Autor: | Hamid Omidvar, Mahyar Hasanabadi, Ali Shamsipur |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Hard metal
Materials science Scanning electron microscope 020502 materials Mechanical Engineering Metallurgy Alloy 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 0205 materials engineering Coating Mechanics of Materials engineering Shear strength Brazing General Materials Science Composite material 0210 nano-technology Electroplating |
| Zdroj: | Materials Science and Technology. 33:2110-2119 |
| ISSN: | 1743-2847 0267-0836 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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