Composite polycrystalline compact with improved fracture and delamination resistance
OwnerRobert H. Frushourinventor
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Abstract
A polycrystalline compact cutting element for use in operations that require high impact and abrasion resistance. The compact includes a substrate formed of tungsten carbide or other hard material with a diamond or cubic boron nitride layer bonded to a mounting surface on the substrate. The interface between the layers is defined by a three-dimensional topography formed with a plurality of surface irregularities in an arrangement whereby a straight line or a constant radii accurate line does not connect a series of adjacent surface irregularities.
Claims10
A cutting element comprising:
- a substrate having a first surface;
- the first surface being formed with a plurality of surface irregularities formed of adjacent protuberances and depressions arranged in a non-linear, non-arcuate, constantly changing pattern across the first surface;
- and
- a polycrystalline material layer having a cutting surface and an opposed mounting surface joined to the first surface of the substrate, the mounting surface having a surface topography complementary to the first surface.
In a cutting element formed of a substrate having a first surface and a polycrystalline material layer having a cutting surface and an opposed mounting surface joined to the first surface of the substrate, the improvement comprising:
- the first surface and the mounting surface having complementary mating surface topographies having a plurality of surface irregularities formed of adjacent protuberances and depressions arranged in a non-linear, non-arcuate, constantly changing pattern across the first surface and the mounting surface.
Dependencies are inferred from the claim text.