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US 12,220,747 B2Granted
Cutting tool
AssigneeSumitomo Electric Hardmetal Corp.
InventorsFumiyoshi Kobayashi, Susumu Okuno, Anongsack Paseuth, Shinya Imamura
Life of this patent
Estimating the term…
Abstract
A cutting tool including a rake face and a flank face includes: a substrate; and a coating film disposed on the substrate, wherein the coating film includes an Al2O3 layer, residual stress of the Al2O3 layer has a minimum value Rmin at at least a portion of a region d1 of the rake face, the minimum value Rmin is more than −0.27 GPa and less than or equal to −0.1 GPa.
Claims17
A cutting tool including a rake face and a flank face, the cutting tool comprising:
- a substrate;
- and
- a coating film disposed on the substrate, wherein
- the coating film includes an Al2O3 layer,
- a residual stress of the Al2O3 layer has a minimum value Rmin at only a portion of a region d1 in the rake face,
- the minimum value Rmin is more than −0.27 GPa and less than or equal to −0.1 GPa,
- in a case where the rake face and the flank face are connected to each other via a cutting edge face, the region d1 is a region interposed between an imaginary line D1 and an imaginary line D2, the imaginary line D1 being separated by 1 mm from an imaginary ridgeline on the rake face, the imaginary ridgeline being formed by intersection of a plane obtained by extending the rake face and a plane obtained by extending the flank face, the imaginary line D2 being separated by 3 mm from the imaginary ridgeline on the rake face, and
- in a case where the rake face and the flank face are connected to each other via a ridgeline, the region d1 is a region interposed between an imaginary line D1 and an imaginary line D2, the imaginary line D1 being separated by 1 mm from the ridgeline on the rake face, the imaginary line D2 being separated by 3 mm from the ridgeline on the rake face.
5 more elements
A cutting tool comprising:
- a rake face and a flank face;
- a substrate;
- and
- a coating film disposed on the substrate, wherein
- the coating film includes an Al2O3 layer,
- a residual stress of the Al2O3 layer has a minimum value Rmin at only a portion of a region d1 in the rake face,
- the minimum value Rmin is more than −0.27 GPa and less than or equal to −0.1 GPa,
- the rake face and the flank face are connected to each other via a cutting edge face,
- the region d1 is a region interposed between an imaginary line D1 and an imaginary line D2, the imaginary line D1 being separated by 1 mm from an imaginary ridgeline on the rake face,
- the imaginary ridgeline being formed by intersection of a plane obtained by extending the rake face and a plane obtained by extending the flank face, and
- the imaginary line D2 being separated by 3 mm from the imaginary ridgeline on the rake face.
8 more elements
A cutting tool comprising:
- a rake face and a flank face;
- a substrate;
- and
- a coating film disposed on the substrate, wherein
- the coating film includes an Al2O3 layer,
- a residual stress of the Al2O3 layer has a minimum value Rmin at only at least a portion of a region d1 in the rake face,
- the minimum value Rmin is more than −0.27 GPa and less than or equal to −0.1 GPa,
- the rake face and the flank face are connected to each other via a ridgeline,
- the region d1 is a region interposed between an imaginary line D1 and an imaginary line D2, the imaginary line D1 being separated by 1 mm from the ridgeline on the rake face, the imaginary line D2 being separated by 3 mm from the ridgeline on the rake face.
6 more elements
Dependencies are inferred from the claim text.