Coated cutting tool
AssigneeTungaloy Corporation
InventorYusuke Hirano
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Abstract
A coated cutting tool has a base material of a WC-based cemented carbide and a film formed on the surface of the base material by a chemical vapor deposition method. The coated cutting tool has a rake face, a flank face and a cutting edge ridgeline part positioned between the rake face and the flank face being provided, wherein a total film thickness of the entire film is 3 to 20 μm in an average film thickness, and one or more oblique cracks where an extension angle of the crack to the surface of the film is 45° or less are present at the rake face within 300 μm from the cutting edge ridgeline part.
Claims15
A coated cutting tool which comprises a base material of a WC-based cemented carbide and a film formed on the surface of the base material by a chemical vapor deposition method, a rake face, a flank face, and a cutting edge ridgeline part positioned between the rake face and the flank face being provided, wherein a total film thickness of the entire film is 3 to 20 μm in an average film thickness, and one or more oblique cracks where an extension angle of the crack to the surface of the film is 45° or less are present at the rake face within 300 μm from the cutting edge ridgeline part.
Dependencies are inferred from the claim text.