Cutting tool insert

B - Operations – Transporting – 23 – B

Patent

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Details

B23B 27/14 (2006.01)

Patent

CA 2566597

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 characterised 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.

L'invention concerne un élément de coupe abrasif en diamant polycristallin qui comprend généralement une couche de diamant polycristallin à haute teneur liée à un substrat en carbure cimenté polycristallin. La couche de diamant polycrystallin comporte une surface de travail ainsi qu'une surface périphérique externe, et est caractérisée en ce qu'elle comprend également une région annulaire, ou une partie de celle-ci, voisine de la surface périphérique, qui est pauvre en matériau catalyseur. Une région voisine de la surface de travail est également pauvre en matériau catalyseur de sorte que lors de l'utilisation, lorsque les rayures d'usure se forment, à la fois le bord d'attaque et le bord de fuite se situent dans une région pauvre en matériau catalyseur.

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