What are the advantages of tungsten carbide spraying and tungsten carbide materials?

Tungsten carbide coating uses high-temperature heat source to melt or semi melt powder materials, and then notifies spraying onto the surface of the workpiece to produce a coating with special properties. At present, our clients include industries such as aerospace, transportation, paper machinery, packaging, and petrochemicals. We spray wear-resistant and corrosion-resistant coatings to improve their service life.

Tungsten carbide materials have high hardness, wear resistance, high temperature resistance, and corrosion resistance, and are widely used in industries such as aerospace, petroleum, metallurgy, and machinery. In typical industrial applications, we call it hard alloy coating, which is usually made of tungsten carbide/cobalt as raw material and sprayed at supersonic speed on the surface of nickel or iron-based materials to produce a protective layer, thereby increasing their wear resistance. stroma. service life. In general, the implementation cost of such processes is not cheap, but compared to the overall cost of component damage and replacement, the saved amount is quite considerable. Surface enhanced coating is one of the eye-catching technologies in the aerospace engine research and development industry. Tungsten carbide is an important basic material used to strengthen the coating of aircraft components.

Characteristics of tungsten carbide coating

1. Wear resistant coating: The hardness is only lower than diamond.

2. Corrosion resistant coating: hydrogen sulfide Saturated saltwater and other corrosive environments have good protective effects.

3. Surface strengthening coating: The graphite surface has strong anti adhesion properties.

4. High temperature corrosion coating: resistant to high temperatures, preventing damage to workpieces caused by high temperatures.

Another advantage of tungsten carbide spraying is that they have no wear and tear on seals, bearings, and other opposing components. In corrosive or corrosive environments, uniformly distributed nanostructures can also wear down coatings, maintaining or even improving surface smoothness. For hydraulic actuators, rotating shafts, and bearings, the coating should maintain a good surface layer to reduce the wear of elastomers and PTFE seals, prevent oil leakage, and help reduce maintenance requirements for aircraft actuators and transmission components.

The reason for using CVD coating technology is that in typical hard alloy spraying techniques, cobalt and cobalt need to be used as bonding phases for tungsten carbide materials, which can improve the density of the material, but cobalt reduces wear resistance and corrosion resistance. CVD coating technology can be used without cobalt. It belongs to the tungsten/tungsten carbide spray coating series of nanostructures, which are generated by atomic crystallization in low-pressure gas media.

It is a complex shape with a non porous coating on the inner surface and aircraft components, constructed with a dense protective layer of tungsten and tungsten carbide components based on designs and composites that cannot use spray coating technology. Geometry. Typical CVD coating applications include on-board fuel metering valves, thrust push rods, sales, bushings, bearings, hooks, clips, landing gears, flap guides and Flat noodles, sleeves, rods, valves, pneumatic pistons and cylinders.

CVD coatings are typically applied at a thickness of 50 μ m, combining high hardness and enhanced toughness and ductility, improved wear resistance and corrosion resistance, while withstanding impact and component deformation.

In summary, tungsten carbide spraying technology is widely used in the aerospace industry, whether it is for aircraft or fighter jets, it can effectively solve the wear and tear of aviation equipment and extend the service life of aviation equipment.