Tungsten Carbide Button Abrasion

During the rock drilling process, tungsten carbide button works by impact crushing on hard rock in order to drill holes on the rock. As a result tungsten carbide button will have friction and crash with the rock. It will cause unavoidable abrasion. Before it cracks, abrasion is a normal failure mode of tungsten carbide button.

Tungsten carbide button bit fails because of abrasion which can not drill rock any more. During the crashing and friction, hard grain in the rock penetrates into the soft binder layer of tungsten carbide button. In the later process, tungsten carbide grain spalls and a small part of tungsten carbide button is worn. Under the continuous pressure of rock drilling machine, tungsten carbide button keeps being abrasive and the contact area between rocks enlarges, tungsten carbide grain spalls little by little. At last tungsten carbide button can no longer be used.


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