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Cutting elements, methods for manufacturing such cutting elements, and tools incorporating such cutting elements

  • US 8,567,531 B2
  • Filed: 05/20/2010
  • Issued: 10/29/2013
  • Est. Priority Date: 05/20/2009
  • Status: Active Grant
First Claim
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1. A cutting element comprising:

  • a polycrystalline diamond body comprising;

    an interface surface;

    a top surface opposite the interface surface;

    a cutting edge meeting the top surface; and

    a material microstructure comprising a plurality of bonded-together diamond grains and interstitial regions between the diamond grains;

    wherein a first region of the microstructure proximate the cutting edge comprises a plurality of the interstitial regions that are substantially free of a catalyst material, and wherein the first region extends from the cutting edge to a depth of at least 300 microns,wherein a second region of the microstructure proximate the interface surface comprises a plurality of the interstitial regions comprising the catalyst material disposed therewithin,wherein the first region comprises a diamond average grain size less than 25 microns, andwherein the first region has at least one of the following properties;

    an apparent porosity less than (0.1051)·

    (the diamond average grain size ^−

    0.3737), ora leached weight loss less than (0.251)·

    (the diamond average grain size ^−

    0.2691), ora diamond volume fraction greater than (0.9077)·

    (the diamond average grain size ^0.0221),with the diamond average grain size provided in microns.

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