Tungsten Carbide (Nickel Bonded)
Tungsten Carbide
(Nickel Bonded)
Tungsten carbide nickel bonded seal faces are commonly used in various industrial applications to prevent leakage between two mating surfaces. They are designed to provide exceptional wear resistance, durability, and reliability under high-pressure and high-temperature conditions.
Nickel Bonding: Nickel is commonly chosen as the bonding material due to its ability to form strong metallurgical bonds with both tungsten carbide and the metal substrate. The bonding process involves heating the components to high temperatures, causing the nickel alloy to melt and fuse the seal face to the metal surface.
The specific properties and characteristics of a nickel bonded tungsten carbide material can vary depending on the composition and manufacturing process. Typically, the tungsten carbide content can range from 70% to 94%, while the nickel content is around 6% to 30%. The balance of nickel and tungsten carbide determines the material’s hardness, wear resistance, and other mechanical properties.
The combination of tungsten carbide and nickel bonding offers several advantages for seal faces:
- Wear Resistance: Tungsten carbide provides excellent resistance against abrasion, erosion, and surface damage caused by particulates or fluids. This wear-resistant property ensures prolonged seal life and minimizes the risk of leakage.
- Chemical Compatibility: Tungsten carbide has good chemical resistance. It can withstand corrosive substances, acids, alkalis, and many other chemicals without significant degradation.
- High-Temperature Capability: Tungsten carbide exhibits excellent thermal conductivity, allowing it to dissipate heat effectively. This property enables the seal face to withstand elevated temperatures without compromising its integrity or performance.
Technical properties of Tungsten carbide (Nickel Bonded)
Properties | Unit of Measurement | Values |
Nickel (Ni) | % | 6 |
Tungsten Carbide (WC) | % | 94 |
Density | g/cm3 | 14.0-14.9 |
Hardness | HRA | >= 88.5 |
Compressive strength | N/mm2 | 5600 |
Transverse rupture strength | N/mm2 | 2600 |
Thermal conductivity | W/moK | 110 |
Coefficient of thermal expansion | 10-6/ok | 6 |
Max. use temperature | oC | 1500 |