Cemented carbide sealing rings are made from tungsten carbide powder as raw material, with the addition of appropriate amounts of cobalt or nickel powder as binders. They are pressed into rings using a specific mold and then sintered in a vacuum furnace or hydrogen reduction furnace. This is a common product manufactured by cemented carbide producers. Due to its high hardness, good corrosion resistance, and strong sealing performance, it has many applications in the petrochemical and other sealing industries.
Cemented carbide sealing rings are composed of a hard metal; they are harder than titanium rings and more durable than gold rings. While very hard, they are not scratch-resistant. Cemented carbide sealing rings can only be scratched by diamonds or corundum containing minerals.
Cemented carbide sealing rings possess wear resistance and corrosion resistance, and are widely used in mechanical seals in the petroleum and chemical industries. Product types include flat rings, platform rings, and other custom-shaped rings. Let’s look at its characteristics:
1. Precision grinding ensures a high-precision appearance, with extremely small dimensions and tolerances, resulting in superior sealing performance.
2. The formulation incorporates corrosion-resistant rare elements, enhancing the sealing durability.
3. Made of high-strength and high-hardness cemented carbide, it is non-deformable and highly pressure-resistant.
4. The sealing ring material must possess sufficient strength, hardness, wear resistance, corrosion resistance, and impact toughness.
Furthermore, cemented carbide sealing rings must also have good machinability and reasonable cost-effectiveness. Wear resistance, corrosion resistance, and resistance to thermal cracking are the most critical requirements. As we know, cemented carbide possesses a series of excellent properties, including high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance. Its high hardness and wear resistance remain essentially unchanged even at 500℃, and it retains high hardness even at 1000℃. Therefore, cemented carbide sealing rings have become one of the most widely used products in mechanical seals.
As the most widely used mechanical seal product, its demand continues to increase with economic development and technological advancements. Based on different binder phases, cemented carbide sealing rings can be divided into various grades. According to XDI’s many years of production experience, the most commonly used cemented carbide sealing ring grades are those with 6% Ni and 6% Co. These grades of cemented carbide sealing rings have higher hardness and wear resistance, as well as superior corrosion resistance.
FOTMA ALLOY can provide customized cemented carbide sealing rings in various specifications and models. We can produce custom-made rings based on customer drawings, meeting the following characteristics: low concentricity, high precision; high end face flatness, uniform stress; long service life; and stable quality and performance. For more information on cemented carbide sealing rings, FOTMA ALLOY welcomes your inquiries!
Post time: Mar-19-2026