摘要
On the base of results of cautiously investigation by scanning electron microscopy (SEM), the authors present a view on the deterioration and wear mechanisms of cemented carbide rock drill buttons for the DTH hammer drill. The deterioration mechanism includes a composite-scale crack formation, WC grain-scale crack formation, and oxidation and corrosion of WC grains. And wear mechanism includes crushing of WC grains and releasing of fragments, detachment of whole or parts of WC grains, tribo-chemical wear of the carbides. The reason why the buttons on the edge of the bit are worn so terribly is analyzed.