Polycrystalline diamond elements, cutting elements, and related methods
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United States of America Patent
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Sep 17, 2019
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N/A
app pub date -
May 7, 2014
filing date -
May 12, 2004
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Abstract
A polycrystalline diamond abrasive cutting element consists generally of a layer of high grade polycrystalline diamond bonded to a cemented carbide substrate. The polycrystalline diamond layer has a working surface and an outer peripheral surface and is characterized by having an annular region or a portion thereof adjacent the peripheral surface that is lean in catalysing material. A region adjacent the working surface is also lean in catalysing material such that in use, as a wear scar develops, both the leading edge and the trailing edge thereof are located in a region lean in catalysing material.
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