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US 2022/0168819 A1Published application
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 f1 in the flank face, the minimum value Rmin is more than or equal to −0.25 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 at least a portion of a region f1 in the flank face,
- the minimum value Rmin is more than or equal to −0.25 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 f1 is a region interposed between an imaginary line F1 and an imaginary line F2, the imaginary line F1 being separated by 0.2 mm from an imaginary ridgeline on the flank 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 F2 being separated by 1 mm from the imaginary ridgeline on the flank face, and
- in a case where the rake face and the flank face are connected to each other via a ridgeline, the region f1 is a region interposed between an imaginary line F1 and an imaginary line F2, the imaginary line F1 being separated by 0.2 mm from the ridgeline on the flank face, the imaginary line F2 being separated by 1 mm from the ridgeline on the flank 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 at least a portion of a region f1 in the flank face,
- the minimum value Rmin is more than or equal to −0.25 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 f1 is a region interposed between an imaginary line F1 and an imaginary line F2, the imaginary line F1 being separated by 0.2 mm from an imaginary ridgeline on the flank 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 F2 being separated by 1 mm from the imaginary ridgeline on the flank 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 at least a portion of a region f1 in the flank face,
- the rake face and the flank face are connected to each other via a ridgeline, the region f1 is a region interposed between an imaginary line F1 and an imaginary line F2, the imaginary line F1 being separated by 0.2 mm from the ridgeline on the flank face, the imaginary line F2 being separated by 1 mm from the ridgeline on the flank face, and
- the minimum value Rmin is more than or equal to −0.25 GPa and less than or equal to −0.1 GPa,
5 more elements
Dependencies are inferred from the claim text.