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US 2026/0286782 A1Published application
A cutting element and methods of making same
AssigneeElement Six (UK) Limited
InventorsGerard DOLAN, Mitchell August ROTHE
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AssigneeElement Six (UK) Limited
InventorsGerard DOLAN, Mitchell August ROTHE
Estimating the term…
A cutting element has a substrate and a body of superhard polycrystalline material bonded to the substrate. The body of superhard polycrystalline material has a working surface, a plurality of spaced apart cutting edges, a chamfer extending from the cutting edges to the working surface, and a recessed region extending into the working surface towards the interface with the substrate and about the longitudinal axis of the body. The cutting edges are spaced around the working surface and separated by a respective further region; the radius of curvature of one or more of the cutting edges being less than the radius of curvature of the substrate. The chamfer extends from the cutting edges to the working surface and is non-variable in one or both of angle relative to the plane extending through the longitudinal axis, and length. The recessed region does not intersect and/or does not interfere with the chamfer.
A cutting element comprising:
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A method according to claim 29, wherein the step of treating comprises treating the pre-sinter assembly to a temperature and pressure such that the diamond grains exhibit inter-granular bonding and define a plurality of interstitial regions therebetween, any residual catalyst/solvent at least partially filling a plurality of the interstitial regions.
A method according to claim 29, further comprising treating at least a portion of the body of polycrystalline diamond material to remove residual catalyst/binder from the interstitial spaces to form a region substantially free of the catalyst/binder material for the PCD material, said portion forming a thermally stable region extending a depth from the working surface of the body of polycrystalline super hard material towards the interface with the substrate.
A method according to claim 28, wherein the step of treating the pre-sinter assembly comprises treating the pre-sinter assembly in a canister that is shaped to create any one or more of the plurality of spaced apart cutting edges, the chamfer, the topology of the working surface, and/or the topology of the peripheral side surface.
A method according to claim 28, further comprising processing the cutting element after the step of treating the pre-sinter assembly to create any one or more of the plurality of spaced apart cutting edges, the chamfer, the topology of the working surface, or the topology of the peripheral side surface.
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Dependencies are inferred from the claim text.