Tungsten Carbide Cutting Tools Grain Size

It is known that tungsten carbide hardness and toughness is affected by the WC grain size. For the finer grain size could be adopted in tungsten carbide cutting tools for light to medium-heavy roughing cuts, whereas the much tougher carbides- the coarse grain size over 8 μm, instead of cutting, they are applied in forming dies. In terms of medium grain size leads to a balance between hardness and toughness and are likely to be used for heavier rough cutting. Specially, if the grain size varies from 0.5μm to 1μm, it falls into micrograin carbides, with which the tungsten carbide cutting tools could offer more wear resistance, sharper cutting edge and better surface finish for hardened steels machining.


With nowadays cutting-edge technology, a hard tungsten carbide adopts using “ultrafine” WCpowder with less than 1% Co binder could offer moderate fracture toughness.

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