Cutting element and methods of making same

Abstract

A cutting element includes a substrate having a peripheral side edge, the peripheral side edge having an associated radius of curvature; and a body of superhard polycrystalline material bonded to the substrate along an interface, the body of superhard polycrystalline material having a peripheral side edge and a longitudinal axis. The body of superhard polycrystalline material has a working surface; and a plurality of spaced apart cutting edges extending to the working surface through respective chamfer portions, the cutting edges being spaced around the working surface by a further region. The cutting edges have an associated radius of curvature, the radius of curvature of one or more of the cutting edges being less than the radius of curvature of the substrate. A method of making such a cutting element is also disclosed.

Dependencies are inferred from the claim text.