Cutting tool and method of making the cutting tool
AssigneeKennametal Inc.
InventorsFrank B. Battaglia, Vincent J. Cackowski, Aharon Inspektor, Edward J. Oles, John J. Prizzi
Life of this patent
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Abstract
A coated cutting tool, and a method of producing the same, comprising a substrate which has a roughened surface that presents a surface roughness of between 15 microinches R.sub.a and 125 microinches R.sub.a. A coating is applied to the roughened surface of the substrate by physical vapor deposition. A coated cutting tool having a low cobalt substrate and experiencing long tool life is also discussed.
Claims62
A coated cutting tool comprising:
- a substrate;
- and
- a PVD coating applied directly onto the surface of the substrate, the PVD coating having an adherence as measured by the Rockwell A indentation adhesion load test of greater than or equal to 80 kg.
A coated cutting tool comprising:
- a substrate;
- a PVD coating directly on the surface of the substrate, the PVD coating having a thickness of at least 6 micrometers on a selected one of the rake face or the flank face, and the PVD coating having an adherence as measured by the Rockwell A indentation adhesion load test is greater than or equal to 60 kg.
A coated cutting tool comprising:
- a substrate having a rake face and a flank face, an edge being at the joinder of the rake face and the flank face, the substrate having a composition of between 0.2 and 2.9 weight percent Co, and the balance consisting essentially of WC;
- and
- a coating where the outer layer being applied by PVD.
A cutting tool made by powder metallurgical techniques including pressing a powder composition into a green compact, the tool comprising:
- a substrate with a rake face and a flank face wherein a cutting edge is at the joinder of the rake face and the flank face;
- and
- the rake face presents a roughened surface formed during the pressing of the green substrate.
A cutting tool comprising:
- a rake face and a flank face wherein a peripheral edge is at the joinder of the rake face and the flank face;
- and
- the rake face presents a roughened surface formed by mechanical action upon the rake face.
A coated cutting tool comprising:
- a substantially fully dense substrate having a rake surface and a flank surface, the rake surface of the substrate having a surface roughness of between 15 microinches R.sub.a and 125 microinches R.sub.a ;
- and
- an outer coating applied by physical vapor deposition so that the cutting tool presents a coated rake face and a coated flank face.
An uncoated cutting tool comprising:
- a polycrystalline diamond substrate having a rake face, a flank face and a cutting edge formed at a juncture of the rake face and flank face;
- and
- wherein said rake face has a roughened surface.
Dependencies are inferred from the claim text.