Layered polycrystalline diamond

摘要

In one aspect of the present invention, a high impact wear resistant tool has a superhard material bonded to a cemented metal carbide substrate at a non-planar interface. The superhard material has a thickness of at least 0.100 inch and forms an included angle of 35 to 55 degrees. The superhard material has a plurality of substantially distinct diamond layers. Each layer of the plurality of layers has a different catalyzing material concentration. A diamond layer adjacent the substrate of the superhard material has a higher catalyzing material concentration than a diamond layer at a distal end of the superhard material.

主权项

1. A tip for use in a high impact, wear resistant tool, the tip comprising:
a substrate having a base end and a non-planar interface spaced apart from said base end; and a superhard material bonded to said non-planar interface and having a distal end with an apex spaced apart from said non-planar interface, said superhard material having a thickness of at least 0.100 inches, and said superhard material having a plurality of diamond layers, at least one of the plurality of layers having an inverted cone geometry, wherein the inverted cone geometry is inverted with respect to the apex of the superhard material and having a center of curvature distal to said at least one layer.