Tungsten Carbide Rock Drill Button Wear Mechanism

Tungsten carbide rock drill buttons wear mechanisms have been the focus of numerous studies, and a large amount of wear data has been published. Recently a new, more comprehensive, view on the deterioration and wear mechanisms of cemented carbide rock drill buttons comes up. The new view combines some of most important aspects, including two life limiting factors, five classes of mechanisms of deterioration and five classes of material removal mechanisms. The view is based on careful high resolution investigations of worn tungsten carbide rock drill buttons selected from drilling of different rock types.

The deterioration includes a fundamental change of material and properties due to intermixing of rock material and cemented carbide in the surface layer of the button. It further includes corrosive decay and oxidation of WC and formation of large-scale cracks in a reptile skin pattern.



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