BRAZED POLYCRYSTALLINE DIAMOND COMPACT

摘要

A thermally stable polycrystalline diamond compact is created by (i) preforming an annular thermally stable polycrystalline from a diamond plate, (ii) preforming a substrate with a projection that has an interfacial mating surface that is a negative topology of the annular thermally stable polycrystalline, (iii) and brazing the two components together. The resulting polycrystalline diamond compact can be made thermally stable because cobalt and other catalysts can be leached out of the thermally stable polycrystalline. The thermally stable polycrystalline can be attached to the substrate by brazing, which due to the topology of the thermally stable polycrystalline and the substrate with a projection will unexpectedly have sufficient blaze shear strength to be used in demanding applications.

主权项

1. A process of manufacturing a thermally stable polycrystalline diamond compact comprising:
(a) creating a substantially annular thermally stable plate that has an interface surface; (b) machining a substantially cylindrical substrate that has an non-planar interface surface; (c) applying a braze to the interface surfaces between the plate and the substrate such that the plate and the substrate are brazed together; wherein the plate's interface surface is a bottom surface of the plate and the orthogonal inner annular surface, and the substrate's interface surface is a top surface of the substrate that comprises a projection that is substantially an inverted topology of plate's interface surface such that when the braze paste is applied, the two components become a mated pair with at least a portion of the substrate's top surface projecting into an inner annular region of the plate and not being mated with the plate.