Cemented Carbide

Cemented carbide is a powder-metallurgical alloy containing one or several refractory carbides (tungsten carbide, titanium carbide, etc.) metal powder (cobalt and nickel, etc. Used as an adhesive

It is used primarily to make high-speed cutting tools, tools for cutting tough and hard materials, and cold work molds, measuring instruments, and impact and vibration-resistant components. Medium-grain cemented carbides are also used for wear parts subjected to impact loads and thermal shock.

What is cemented carbide?

Cemented carbide is a powder-metallurgical composite material in which hard, tungsten carbide (WC) particles are bonded together with a tough, metallic alloy binder. These Cemented Carbide Plates composites are referred to as "hardmetals" and are one of the most successful composite engineered materials used today.

They are characterized by high strength, toughness and good wear resistance. This combination of properties makes them the most versatile hard materials group within engineering and tooling applications.

In the manufacturing process, WC is mixed with a metal binder such as iron, chromium, nickel or cobalt by liquid phase sintering. This combination of tungsten carbide and metal binder allows the production of a variety of grades varying in properties from high-speed cutting tools to wear-resistant parts.

Depending on the tungsten carbide and carbonitride content, these grades can be classified into either uncoated or coated grades. The uncoated grades are straight WC/Co structures or high volumes of cubic carbonitrides. They can be used to machine HRSA and titanium alloys, as well as turn hardened materials at low speeds.


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What are the features of cemented carbide?

Cemented carbide is a kind of hard alloy, mainly composed of refractory metal hard compound (hard phase), which is generally tungsten carbide or titanium carbide and metal binder obtained by powder metallurgy method. It is used to make turning tools, milling cutters and planers, as well as drills.

Cemented carbide is a faster cutting tool than high-speed steel and has a longer service life. It can also cut hard materials up to 50 HRC. It also has high compressive strength, 6000MPa, elastic modulus of (4-7)x105MPa, and bending strength of 1000-3000mpa.

K. Schroter, a German chemist, created cemented carbide in 1923. He carbonized W and then reacted powders of W and Co under a hydrogen atmosphere. This technique was later applied by Krupp in Germany, who released products with the name Widia (Wie Diamant, meaning "like diamond").

WC-Co is the most popular type of cemented carbide like G25 cemented carbide balls. This grade is still the most widespread representative of cemented carbide in industrial use today, as it has a good wettability and pore-free structure.

What are the uses of cemented carbide

Cemented carbide is a powder-metallurgical composite material containing hard tungsten carbide (WC) particles bonded together by a metallic binder. The binder consists of cobalt, nickel, or other metals and is characterized by its hardness, wear resistance, and toughness.

The main component of the WC phase is approximately 70 % to 97% of the total weight. The WC average grain size is between 0.4 and 10.

Cemented carbide is a superior choice to ceramics and cermets in terms of strength, hardness, and toughness. This enables machining of hard materials at high speeds and provides a long machining life.

The main application of cemented carbide is to manufacture high-speed tools and cutting tools for hard and tough materials, cold work molds, measuring tools and high wear-resistant parts that are not subject to impact and vibration. These types of inserts are formed by pressing or metal injection molding (MIM) followed by sintering.


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What are the advantages of cemented carbide?

Cemented carbide is a class of composite materials which consists of hard particles of tungsten carbide (WC) or titanium carbide (TiC) bonded together by a Binder Hard metal strip. They are unique in their hardness, toughness and wear resistance.

Tungsten carbide is very popular for cutting tools and in many other industrial applications. It is a hard and strong material that is used in many products such as metal cutting tools, molds to powder compact automobile engine parts and tools for breaking down bedrock during shield tunneling.

Tungsten-cobalt and tungsten-titanium-cobalt cemented carbides are widely used, but they can also be combined with other components such as titanium or tantalum. A cobalt content of 6 to 16 percent is common in most cases. This increases the toughness of the grade and reduces the tendency for WC grain formation to crater.