Tungsten Carbide/Cobalt (WC90/Co10) Tube is a high-performance composite material engineered for applications requiring extreme hardness, wear resistance, and mechanical strength. Combining 90% tungsten carbide (WC) and 10% cobalt (Co), this alloy achieves an exceptional balance between the rigidity of ceramics and the toughness of metals, making it ideal for heavy-duty industrial environments (Park et al., 2012; Konyashin, 2017).
Material Overview
Physically, WC-Co composites are characterized by their outstanding hardness and density. Tungsten carbide exhibits a melting point of approximately 2600 °C and a density of 15.7 g/cm³, while cobalt’s melting point of 1459 °C and density of 8.9 g/cm³ contribute to the alloy’s ductility and toughness. The WC90/Co10 composition typically achieves a relative density of up to 99.5% through advanced sintering techniques, maintaining an average grain size near 0.3 µm. This fine-grained structure results in a hardness of about 2200 kg/mm² and a fracture toughness of roughly 9.8 MPa·m1/2, ensuring superior performance even under extreme mechanical and thermal stress (Polyakov et al., 2014).
Chemically, the WC-Co composite benefits from the synergistic combination of tungsten carbide’s ceramic rigidity and cobalt’s metallic ductility. WC provides exceptional wear and oxidation resistance, while Co serves as a binder phase that enhances impact strength and thermal shock resistance. This dual-phase microstructure makes WC90/Co10 highly resilient in high-friction, high-temperature environments (Konyashin & Ries, 2022).
Processing and Microstructure
The production of WC90/Co10 typically employs powder metallurgy techniques, including hot pressing or rapid sintering under controlled atmospheres. These processes prevent oxidation, ensure uniform grain distribution, and enhance interfacial bonding between carbide and binder phases. The result is a dense, homogeneous composite with exceptional mechanical integrity (Ядамрагчаа & Дэлгэрмаа, n.d.).
Applications and Advantages
Cutting and wear-resistant tools. WC90/Co10 tubes are widely used in cutting tools, abrasives, and drilling components due to their superior hardness and resistance to deformation. The material’s high compressive strength and fracture toughness make it ideal for high-speed machining and mining operations (Konyashin, 2017).
Friction stir welding and industrial tooling. The alloy’s thermal stability and strength at elevated temperatures make it suitable for friction stir welding (FSW) tools, wear sleeves, and mechanical seals, where long-term dimensional stability and resistance to fatigue are critical (Park et al., 2012).
Harsh environment durability. Owing to its excellent chemical stability and oxidation resistance, WC90/Co10 is also used in oil and gas drilling tools, construction machinery, and cutting nozzles that operate in abrasive and corrosive conditions (Polyakov et al., 2014).
Performance Benefits
- Exceptional hardness (~2200 kg/mm²) with fine-grained microstructure (~0.3 µm).
- High fracture toughness (≈9.8 MPa·m1/2) and resistance to cracking.
- Superior wear and corrosion resistance under high-temperature operation.
- Maintains strength and dimensional stability during mechanical loading.
- Ideal for cutting, drilling, and welding tool fabrication.
Goodfellow Availability
Goodfellow supplies WC90/Co10 in tube form for advanced manufacturing, machining, and tooling applications. This composite’s high hardness, toughness, and corrosion resistance make it an excellent choice for precision engineering and long-service industrial tools.
Explore Tungsten Carbide/Cobalt (WC90/Co10) and related materials in Goodfellow’s online catalogue: Goodfellow product finder.
References
- Park, H.-K., Youn, H.-J., Ryu, J.-H., Jang, J.-H., Shon, I.-J., & Oh, I.-H. (2012). Mechanical Properties and Fabrication of WC-Co Hard Materials by Rapid Sintering Method for Friction Stir Welding Tool Application. https://doi.org/10.5781/KWJS.2012.30.6.578
- Polyakov, E. V., Krasil’nikov, V. N., Tyutyunnik, A. P., Khlebnikov, N. A., & Shveikin, G. P. (2014). Precursor-based Synthesis of Nanosized Tungsten Carbide WC and WC: n Co Nanocomposites. Doklady Physical Chemistry. https://doi.org/10.1134/S0012501614070033
- Konyashin, I. Yu. (2017). Cemented Carbide Tools. https://doi.org/10.1016/B978-0-12-804173-4.00023-5
- Ядамрагчаа, Ц., & Дэлгэрмаа, М. (n.d.). Исследование свойств бинарного сплава на основе карбида вольфрама. https://doi.org/10.25712/astu.1811-1416.2021.03.015
- Konyashin, I., & Ries, B. H. (2022). Materials Engineering of Cemented Carbides. https://doi.org/10.1016/b978-0-12-822820-3.00016-1