COATED PCBN CUTTING INSERT, COATED PCBN CUTTING TOOL USING SUCH COATED PCBN CUTTING INSERT, AND METHOD FOR MAKING THE SAME

A coated polycrystalline cubic boron nitride cutting insert (28, 58), which has a polycrystalline cubic boron nitride substrate (70, 126) with a cutting edge (34, 66). A wear-resistant coating scheme (74, 74A) is on the polycrystalline cubic boron nitride substrate. The wear-resistant coating scheme...

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Bibliographische Detailangaben
Hauptverfasser:	LIU, YIXIONG, BAN, ZHIGANG
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	ARTIFICIAL STONE BORING CEMENTS CERAMICS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM LIME, MAGNESIA MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY PERFORMING OPERATIONS REFRACTORIES SLAG SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING TREATMENT OF NATURAL STONE TURNING
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Beschreibung
Zusammenfassung:	A coated polycrystalline cubic boron nitride cutting insert (28, 58), which has a polycrystalline cubic boron nitride substrate (70, 126) with a cutting edge (34, 66). A wear-resistant coating scheme (74, 74A) is on the polycrystalline cubic boron nitride substrate. The wear-resistant coating scheme includes an inner coating layer region (94, 150) and at least one exposed alumina coating layer (84, 84A, 138). The exposed alumina coating layer (84, 84A, 138) exhibiting a post-blasted stress condition with stress ranging between about 50 MPa (tensile stress) and about - 2GPa (compressive stress) as measured by XRD using the Psi tilt method and the (024) reflection of alumina. The exposed coating layer (84, 84A, 138) is the result of wet blasting an outer titanium-containing coating layer (86, 88, 140, 142) from the surface of the alumina-containing coating layer region (84, 138). La présente invention concerne un insert de découpe (28, 58) en nitrure de bore cubique polycristallin enrobé, présentant un substrat (70, 126) en nitrure de bore cubique polycristallin ayant un tranchant (34, 66). Un système d'enrobage résistant à l'usure (74, 74A) est déposé sur le substrat en nitrure de bore cubique polycristallin. Le système d'enrobage résistant à l'usure comprend une zone de couche d'enrobage interne (94, 150) et au moins une couche d'enrobage en alumine exposée (84, 84A, 138). La couche d'enrobage en alumine exposée (84, 84A, 138) présente une condition de contrainte après sablage comprise entre 50MPa (contrainte à l'étirement) et environ 2GPa (contrainte à la compression) mesurée par XRD au moyen du procédé d'inclinaison Psi et de la réflexion (024) de l'alumine. La couche d'enrobage exposée (84, 84A,138) est obtenue par sablage humide de la région de couche d'enrobage contenant l'alumine (84, 138).