Title:
CUTTING TOOL
Document Type and Number:
WIPO Patent Application WO/2020/079893
Kind Code:
A1
Abstract:
Provided is a cutting tool comprising a substrate that has a relief surface, and a coating film that coats the relief surface, wherein: the coating film includes an α-Al2O3 layer provided on the substrate; the α-Al2O3 layer includes crystal grains of α-Al2O3; the area ratio of crystal grains that are (001) oriented in the relief surface of the α-Al2O3 layer is 50-90%; in measurement of residual stress according to a 2θ-sin2ψ method in which X-rays are used, the in-film residual stress AA derived on the basis of the crystal plane interval of the (001) surface of the α-Al2O3 layer in the relief surface is at least -1000 MPa and less than 0 MPa, and the in-film residual stress BA derived on the basis of the crystal plane interval of the (110) surface of the α-Al2O3 layer in the relief surface is at least -1000 MPa and less than 0 MPa; and the relational expression |AA| ≤ |BA| is satisfied.
Inventors:
OKUNO SUSUMU (JP)
IMAMURA SHINYA (JP)
ONO SATOSHI (JP)
PASEUTH ANONGSACK (JP)
IMAMURA SHINYA (JP)
ONO SATOSHI (JP)
PASEUTH ANONGSACK (JP)
Application Number:
PCT/JP2019/026819
Publication Date:
April 23, 2020
Filing Date:
July 05, 2019
Export Citation:
Assignee:
SUMITOMO ELECTRIC HARDMETAL CORP (JP)
International Classes:
B23B27/14; B23B51/00; B23C5/16; C23C14/08; C23C16/40
Domestic Patent References:
| WO2012063515A1 | 2012-05-18 |
Foreign References:
| JP2016165789A | 2016-09-15 | |||
| JP2013132717A | 2013-07-08 | |||
| JP2017177292A | 2017-10-05 | |||
| JP2017013223A | 2017-01-19 | |||
| EP2287359A1 | 2011-02-23 | |||
| JP2018194133A | 2018-12-06 | |||
| JP2004284003A | 2004-10-14 | |||
| JP2009028894A | 2009-02-12 |
Other References:
See also references of EP 3868501A4
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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