Tungsten Carbide Cutting Tool Wear Rate Relating to Natural Wood Cutting

The quantity and the extractives’ chemical nature, are the vial factors that may influence tungsten carbide cutting tool wear rate, in natural wood. Some acids, for example tannic and acetic, which occur in wood and depending on the moisture content of the wood, these acids can lead to corrosion of the tool during cutting, adding to the overall tool degradation. It is thus expected that the wear rates for cutting green woods would be higher than those for cured woods, since the moisture content is higher in the green woods.

If adopts the tool metal forms chelation reactions with the extractives present in the wood. It is known that most metals form chelation reactions, thus the probability of a metal forming chelates with wood is suppose to be high. The chemical properties of iron and cobalt are known to be similar, so it is expected that cobalt will undergo chelation with the extractives as readily as iron, leading to increasing wear rates. The chelation of tungsten carbide is difficult to predict.It was also found that the wear rate increased with increasing binder volume fraction, an increase in the normal rubbing
force and an increase in the carbide particle size.


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