Types of Cemented Carbide

Tungsten Carbide/Cobalt (WC/Co): The first commercially available sintered Cemented Carbide consisted of high angular particles of Tungsten Carbide bonded to metallic Cobalt. Bonded to metallic cobalt. For the Z-hardness obtained from packing density, tungsten carbide fines should be as small as possible, preferably less than 1 μm (0.00004 in.) and quite small for special applications. As cobalt content decreases its hardness and wear resistance increases, and for special applications it should be quite small. As the cobalt content decreases, the hardness and wear resistance increase, as long as there is a low Z content of cobalt in the sintering (2% is sufficient, although the actual low Z content is 3%). In any case, 3% is sufficient. In any case, as the amount of carbide fines or cobalt or both increase, harder or softer grades are obtained. As the amount of tungsten carbide fines or cobalt or both increase, harder or softer grades are obtained. Many tungsten carbide/cobalt compositions are adjusted by small but very important additives - from 0.5 to about 3% tantalum - from 0.5 to about 3% tantalum, tantalum, niobium, chromium, vanadium, titanium, hafnium, or other carbides. The basic purpose of these additives is generally to inhibit the growth of fine grain, other carbides. The basic purpose of these additives is generally to inhibit the growth of fine particles, so that a consistently fine structure can be maintained. The basic purpose of these additives is to inhibit fine grain growth and therefore maintain a consistently fine structure. Tungsten-Titanium Carbide/ Tungsten-Titanium Carbide/Cobalt (WC/TiC/Co): These percentages are used for cutting steel and other iron-based alloys as a tool, and the TiC component serves to resist the diffusive impact of high temperatures caused by chemical decomposition and crater formation. The tungsten carbide diffuses into the surface of the insert, where it can be used for impacts. Tungsten carbide diffuses to the surface of the insert, but titanium carbide is extremely resistant to this diffusion. solid solution or ‘solid solution crystals’ WC in TiC remains extremely resistant to pit formation. WC in solid solution or ‘solid solution crystals’ in TiC remains resistant to cratering to a significant degree. Pit forming properties to a great extent. Unfortunately, titanium carbide and TiC TiC-based solid solutions are very brittle and less abrasive than tungsten carbide. Unfortunately, titanium carbide and TiC-based solid solutions are very brittle and not as wear resistant as tungsten carbide. Unfortunately, titanium carbide and TiC-based solid solutions are very brittle and not as wear-resistant as tungsten carbide. The TiC content is therefore kept as low as possible. In extreme formulations the carbide is tungsten-free and based exclusively on a TiC TiC basis In extreme formulations the carbide is tungsten-free and based exclusively on a TiC basis, but the general TiC content must not exceed 18% If this value is exceeded, the TiC content must not exceed 18%. If this value is exceeded, the TiC composition cannot exceed 18%. If this value is exceeded, the carbide becomes too brittle and very difficult to braze. Carbide becomes too brittle and very difficult to braze.  WC angular crystals and rounded WC angular crystals and rounded TiC/Co hybrid crystals. Although WC/TiC/Co hard metals are very widely used in the developing manufacturing industry, they are prohibited in some important considerations and in many applications are replaced by WC/TiC/Ta( Nb)C/Co, which has the advantage of higher strength and resistance to pitting. TiC, TiN and other coatings on hard substrates have also reduced the attractiveness of high speed machining steels and ferrous alloys for high TiC compositions. Attractiveness of TiC compositions