Stock material or miscellaneous articles – Composite – Of inorganic material
Reexamination Certificate
2011-01-18
2011-01-18
Turner, A. A. (Department: 1784)
Stock material or miscellaneous articles
Composite
Of inorganic material
C051S307000, C051S309000, C428S141000, C428S156000, C428S701000
Reexamination Certificate
active
07871715
ABSTRACT:
A surface-coated cutting insert includes an insert body having a substrate of tungsten carbide-based cemented carbide, titanium carbonitride-based cermet or ceramics, a base layer, an intermediate layer and an outermost layer, the base layer and the outermost layer are made of a single layer or two or more layers formed of carbides, nitrides, oxides, or borides of one selected from the group consisting of Group IVa metals, Group Va metals, Group VIa metals, aluminum and silicon, or complex compounds thereof, and the intermediate layer is formed of primarily Al2O3, the outermost layer is removed on part of the insert body surface including the flank face and a flank face-side cutting edge portion of the intersecting edge line region, with the outermost layer being left on part of the rake face inside a boundary with the intersecting edge line region. The method for manufacturing this surface-coated cutting insert includes: forming a cutting edge at the intersecting edge line region; coating the surface of the insert body with a base layer, an intermediate layer and an outermost layer; and then removing the outermost layer on part of the surface of the insert body including the flank face and a flank face-side cutting edge portion of the intersecting edge line region, but excluding part of the rake face inside a boundary with the intersecting edge line region.
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Ohmori Hiroshi
Okada Yoshikazu
Saeki Takushi
Leason Ellis LLP.
Mitsubishi Materials Corporation
Turner A. A.
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