Polycrystalline diamond cutter with an integral alternative material core
First Claim
1. A polycrystalline diamond compact, comprising:
- (A) a layer of superabrasive material;
(B) a substrate attached to said layer of superabrasive material;
(C) a diamond core completely enclosed within an internal cavity of said substrate.
2 Assignments
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Accused Products
Abstract
A cutting element, insert or compact, is provided for use with drills used in the drilling and boring of subterranean formations or in machining of metal, composites or woodworking. This new insert besides having a superabrasive layer on the surface of a substrate, also may have one or more superabrasive core element sections incorporated in the substrate to provide improved internal residual stress characteristics. By so manipulating residual stresses, this invention provides cutting elements, which are more fracture resistant thereby providing improved work life. Also, by providing additional superabrasive material in the substrate, this invention improves the cutting efficiency of the compact after the compact has undergone significant wear. Another embodiment of this invention employs one or more carbide core regions within a superabrasive region, which covers the majority of the outer surface of the insert.
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Citations
12 Claims
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1. A polycrystalline diamond compact, comprising:
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(A) a layer of superabrasive material;
(B) a substrate attached to said layer of superabrasive material;
(C) a diamond core completely enclosed within an internal cavity of said substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A polycrystalline diamond compact, comprising:
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(A) a polycrystalline diamond region, having an exterior, a cutting surface, and an interior; and
(B) a first carbide core enclosed within said interior of said polycrystalline diamond region. - View Dependent Claims (9, 10, 11, 12)
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Specification