Surface-coated cutting tool and manufacturing method thereof
AssigneeSumitomo Electric Hardmetal Corp.
InventorsAnongsack Paseuth, Yoshio Okada, Hideaki Kanaoka, Chikako Kojima, Erika Iwai
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Abstract
A surface-coated cutting tool according to the present invention includes a base material and a coating film formed on the base material. The coating film includes at least one TiCN layer. The TiCN layer has a columnar crystal region. The columnar crystal region is characterized by having a composition of TiCxNy (in which 0.65≦x/(x+y)≦0.90) and having a (422) plane having a plane spacing of 0.8765 Å to 0.8790 Å.
Claims3
A surface-coated cutting tool comprising:
- a base material;
- and
- a coating film formed on said base material, wherein
- said coating film includes at least one TiCN layer,
- said TiCN layer has a columnar crystal region, and
- said columnar crystal region has a composition of TiCxNy (in which 0.65≦x/(x+y)≦0.90) and has a (422) plane of a plane spacing of 0.8765 Å to 0.8780 Å, and has TC (422) showing a maximum value in an orientation index TC (hkl).
A method of manufacturing a surface-coated cutting tool including a base material and a coating film formed on said base material, said coating film including at least one TiCN layer, said method comprising the step of:
- forming said TiCN layer,
- said step being performed by supplying raw material gas having a volume equal to or greater than 10 times as much as a volume of a reaction chamber of a chemical vapor deposition apparatus to the chemical vapor deposition apparatus per minute, to form said TiCN layer by a chemical vapor deposition method, and
- said raw material gas containing at least C2H4.
Dependencies are inferred from the claim text.