Why is cemented carbide an essential material for wear-resistant valves?

The chemical industry is a harsh environment, and pipelines and valves play a crucial role in modern chemical production. Valves in pipelines transporting powders, granules, and slurries face severe environmental challenges, frequently leading to valve wear and failure. Therefore, we need highly wear-resistant and corrosion-resistant materials for valves to extend their service life; cemented carbide is the ideal choice.

In pipelines transporting coal chemicals and slurries, valve sealing components are subjected not only to sliding friction wear from sealing parts but also to high-speed impacts from high-temperature, high-hardness gas-solid mixtures, as well as flashing and cavitation caused by high-pressure fluids, all of which can damage valves and accelerate failure. Therefore, wear resistance is a critical performance indicator for valves under harsh conditions such as powder transport.

We choose integrally sintered tungsten carbide cemented carbide as the valve material. It not only boasts high strength but also a high surface finish. When used in combination with other materials, its coefficient of friction is lower than that of steel, significantly reducing contact surface friction and effectively lowering operating torque.

Integral sintered tungsten carbide cemented carbide is made by heating a mixture of tungsten and carbon at high temperatures. Most tungsten carbides have high hardness, are not easily decomposed at high temperatures, and have good oxidation resistance.

In coal gasification valves, the valve disc and seat are formed by integral sintered tungsten carbide cemented carbide to create a sealing pair. The valve performance has the following significant advantages:

Integral sintered tungsten carbide cemented carbide possesses high strength, high hardness, high melting point, high stability, low coefficient of friction, wear resistance, erosion and cavitation resistance, and corrosion resistance. It is used to manufacture wear-resistant valve seals for harsh working conditions, which can greatly improve the applicability of valves, expand the range of valve applications, and extend the service life of valves.