Thick pointed superhard material

摘要

In one aspect of the invention, a high impact resistant tool includes a superhard material bonded to a cemented metal carbide substrate at a non-planar interface. The superhard material has a substantially pointed geometry with a sharp apex having a radius of curvature of 0.050 to 0.125 inches. The superhard material also has a thickness of 0.100 to 0.500 inches thickness from the apex to a central region of the cemented metal carbide substrate.

主权项

1. A high impact resistant tool, comprising a cutting end extending a height from a grip region and a sintered polycrystalline diamond material bonded to a cemented metal carbide substrate at an interface, said diamond material at least partially forming the cutting end, the cutting end comprising:
a side surface extending from an outer diameter of the grip region to an apex having a central axis, said central axis passing through said cemented metal carbide substrate, said apex having a radius of curvature from about 0.050 to about 0.160 inches measured in a vertical orientation from said central axis, the diamond material forming the side surface and the apex, and the thickness of the diamond material along the central axis from the interface to the apex being greater than the radius of curvature.