Cobalt-based alloy powders mainly consist of cobalt alloy matrices and the addition of tungsten carbide. The reaction between tungsten and cobalt alloy matrices leads to solution strengthening, while tungsten carbide particles can provide precipitation strengthening effect. The double strengthening effects make the alloy materials remain excellent strength and hardness even at high-temperature environments. Cobalt-based alloy materials great high-temperature wear resistance and oxidation resistance, so they are suitable for applications in high-temperature environments.
(Reminder: The crystal structure of cobalt transforms from hexagonal closed packed into face-center cubic when the temperature increases to beyond 417°C, which causes internal stress. To avoid the rupture of the welding layer, workpieces should be pre-heated to around 500 – 600°C before cladding or spraying.)
|Particle Size (μm)||25-50|
|Oxygen Content||Less than 400 ppm|
|Applicable Manufacturing Process|| Oxyacetylene Spraying|
Plasma Transferred Arc (PTA)
High-Velocity Oxygen Fuel (HVOF)
|Applicable Fields||Valve seats、valves、bearings、chain saws、aerospace parts、high-temperature molds|