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Titanium carbide (TiC) is an extremely hard refractory ceramic material similar to tungsten carbide, and registers 9-9.5 on the Mohs scale. It appears as black powder and has a sodium chloride, face-centered cubic crystal structure. Titanium carbide has a low melting point, high strength, a high Young’s modulus, good chemical stability and corrosion resistance and is highly electrically conducive. It is primarily used in cutting tools, aerospace components and wear-resistant coatings, and has been found in optical applications.
Carbide is the tooling of choice when machining titanium because it maintains its hardness over a wide temperature range, has a high modulus of elasticity and can be coated to improve tool life and disperse heat. Most of our end mills will be made from a mixture of tungsten and titanium carbide, with specialist coatings to help improve performance and extend tool life.
TiC grades that are superfine in grain size have a high binding metal content that allows for a higher hardness and toughness. This is compared to standard grades that are coarsely grain-sized and have lower hardness and toughness values.
It’s important to understand that the transverse rupture strengths of cemented carbide grades in the properties charts produced by suppliers are based on tests conducted on small samples and should not be taken as indicative of how the grade will perform in a particular application. Instead, fracture toughness is a better gauge of performance for a given grade. Fracture toughness increases with size and is therefore a much more accurate representation of how the grade will work in your specific application.