Thai Carbide Co., Ltd Manufacturer of
Tungsten carbide, Carbide tools, Carbide Saws
Thai Carbide Co., Ltd.
Mr. Kit Sriannatanon
14/14 Puttamonthon 4 Rd.
Nakhon Pathom 7311
Tel : 02 814-1841-3
Fax :02 814-1844
Monotungsten carbide, WC, or Ditungsten Carbide, W2C, is a chemical
compound containing tungsten and carbon, similar to titanium carbide.
Its extreme hardness makes it useful in the manufacture of cutting
tools, abrasives and bearings, as a cheaper and more heat-resistant
alternative to diamond. Tungsten carbide is also used as a
scratch-resistant material for jewelry including watch bands and wedding
Carbide cutting surfaces are often useful when machining through
materials such as carbon steel or stainless steel, as well as in
situations where other tools would wear away, such as high-quantity
production runs. Sometimes, carbide will leave a better finish on the
part, and allow faster machining. Carbide tools can also withstand
higher temperatures than standard high speed steel tools. The material
is usually tungsten-carbide cobalt, also called "cemented carbide", a
metal matrix composite where tungsten carbide particles are the
aggregate and metallic cobalt serves as the matrix.
Machining with carbide can be difficult, as carbide is more brittle than
other tool materials, making it susceptible to chipping and breaking. To
offset this, many manufacturers sell carbide inserts and matching insert
holders. With this setup, the small carbide insert is held in place by a
larger tool made of a less brittle material (usually steel). This gives
the benefit of using carbide without the high cost of making the entire
tool out of carbide. Also, Most modern face mills use carbide inserts,
as well as some lathe tools and end mills.
To increase the life of carbide tools, they are sometimes coated. Four
such coatings are TiN (titanium nitride), TiC (titanium carbide), Ti(CN)
(titanium carbide-nitride), and TiAlN (Titanium Aluminum Nitride).
(Newer coatings, known as DLC (Diamond Like Coating) are beginning to
surface, enabling the cutting power of diamond without the unwanted
chemical reaction between real diamond and iron.) Most coatings
generally increase a tool's hardness and/or lubricity. A coating allows
the cutting edge of a tool to cleanly pass through the material without
having the material gall (stick) to it. The coating also helps to
decrease the temperature associated with the cutting process and
increase the life of the tool. The coating is usually deposited via
thermal CVD. However if the deposition is performed at too high
temperature, an eta phase of a Co6W6C tertiary carbide forms at the
interface between the carbide and the cobalt phase, facilitating
adhesion failure of the coating.