Cvd and pvd coated cutting tools

C - Chemistry – Metallurgy – 23 – C

Patent

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Details

C23C 16/30 (2006.01) B23B 27/14 (2006.01) C23C 14/06 (2006.01) C23C 16/34 (2006.01) C23C 16/36 (2006.01) C23C 28/00 (2006.01)

Patent

CA 2090854

Provided is a coated cutting tool (10) having a coating and a substrate. The coating includes at least one chemical vapor deposited (CVD) layer and at least one physical vapor deposited (PVD) layer. The outermost layer of the coating is a PVD layer, containing residual compressive stresses. The substrate is a composite having hard refractory grains bonded together by a binder material.

La présente invention vise un outil de coupe revêtu (10), composé d'un support et d'un revêtement. Le revêtement est constitué d'au moins une couche réalisée par dépot en phase gazeuse par procédé chimique (DPC) et d'au moins une couche réalisée par dépot en phase gazeuse par procédé physique (DPP). La couche extérieure du revêtement est une couche DPP soumise à des contraintes de compression résiduelles. Le suppport est un matériau composite à base de grains de matière réfractaire durs liaisonnés à un liant.

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