Cutting element for a rotary drill bit, and method for manufacturing such an element.

摘要

A cutting element for a rotary drill bit comprises a layer (20) of polycrystalline diamond material having a front face and a rear face, a backing layer (21) of less hard material bonded to the rear face of the diamond layer, and a front layer (22) of less hard material bonded to the front face of the diamond layer and extending across at least the major part thereof. The front layer (22) is thinner than the backing layer (21), at least in the vicinity of the cutting edge (23) of the cutting element.