Method of making coated cutting tools
AssigneeKennametal Inc.
InventorsFrank B. Battaglia, Vincent J. Cackowski, Aharon Inspektor, Edward J. Oles, John J. Prizzi
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Abstract
A method of producing a cutting tool, 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.
Claims19
A method of producing a coated cutting tool having a rake surface and a flank surface and a cutting edge at a juncture of said rake surface and flank surface, the method comprising the steps of:
- resintering a substantially fully dense substrate so as to produce grain growth at the surface of the substrate sufficient to provide a surface roughness between 15 microinches R.sub.a and 125 microinches R.sub.a ;
- and
- applying a coating to the substrate wherein said coating comprises a layer which is applied by physical vapor deposition on the rake surface and the flank surface of the substrate.
A method of producing a cutting tool having a polycrystalline diamond substrate, a polycrystalline diamond rake surface, a polycrystalline diamond flank surface and a polycrystalline diamond cutting edge, at a junction of the rake surface and the flank surface, the method comprising the step of:
- roughening selected portions of said polycrystalline diamond rake surface.
A method of producing a cutting tool having a polycrystalline diamond substrate, a polycrystalline diamond rake surface, a polycrystalline diamond flank surface and a polycrystalline diamond cutting edge, at a junction of the rake surface and the flank surface, the method comprising the step of:
- providing at least a portion of said polycrystalline diamond rake surface with a surface roughness greater than the surface roughness of the polycrystalline diamond flank surface.
Dependencies are inferred from the claim text.