Micromechanisms of Tungsten Carbide Inserts’ Tool Wear (3)

Chipping

It is known that during the machining operation, when sudden loads or thermal shocks occur, there is a potential for the tungsten carbide inserts to suffer from severe damage due to cracking or chipping.

In some comprehensive model, the researchers have described in details, the toughness of tungsten carbide is strongly influenced by the binder composition. It has been pointed out that the toughness of WC-Co is superior to that of TiC-Ni, in addition, the problem of tungsten carbide inerts failure due to chipping is particularly severe for alumina based tools, but with zirconia additions, the toughness of  tungsten carbide tool could be markedly improved.


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