Tungsten Carbide Woodcutting Tool Temperatures(1)

While applying tungsten carbide wood cutting tools to deal with cutting of wood products, the relevant temperatures would likely to affect the type of wear mechanisms, and which also shows the tendency of breaking out high temperature oxidation of cobalt. Although some researchers argued that the temperatures measured during woodcutting are not high enough to cause oxidation of the tungsten carbide grains and the oxidation of cobalt occurs in air over a wide range of temperatures above ambient temperature and that the oxidation rate is very low, below 700°C . The differing opinions on this mechanism is mainly due to the inability to directly measure the temperature at the cutting edge and possibly also due to the type of micro-analytical methods used to examine the worn surfaces. X-ray photon spectroscopy (XPS) is a good technique which can be used in the determination of oxides. However, this method has rarely been used and thus the type of reactions and mechanisms caused predominantly by the cutting temperatures remain unclear.

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