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Title:
SURFACE-COATED CUTTING TOOL
Document Type and Number:
WIPO Patent Application WO/2018/100849
Kind Code:
A1
Abstract:
A surface-coated cutting tool which is provided with a base material and a coating film that covers the surface of the base material. The coating film comprises a super-multilayer structure layer in which layers A and layers B having a composition different from that of the layers A are alternately laminated from the base material side toward the surface side. The super-multilayer structure layer has a configuration wherein regions X, in which layers A having a thickness of AX and layers B having a thickness of BX are alternately laminated, and regions Y, in which layers A having a thickness of AY and layers B having a thickness of BY are alternately laminated, are alternately repeated from the base material side toward the surface side. The thickness AX of the layers A is larger than the thickness AY of the layers A; and the thickness BX of the layers B is smaller than the thickness BY of the layers B. The layers A and the layers B have a composition that is composed of one or more elements selected from the group consisting of Ti, Al, Cr, Si, Ta, Nb and W and one or more elements selected from the group consisting of C and N.

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Inventors:
TANAKA KEIZO (JP)
SETOYAMA MAKOTO (JP)
KOBAYASHI YUTAKA (JP)
KOBAYASHI AKIRA (JP)
Application Number:
PCT/JP2017/033965
Publication Date:
June 07, 2018
Filing Date:
September 20, 2017
Export Citation:
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Assignee:
SUMITOMO ELECTRIC HARDMETAL CORP (JP)
International Classes:
B23B27/14; B23B51/00; B23C5/16; B23D77/00; B23F21/00; B23G5/06; C23C14/06
Domestic Patent References:
WO2014025057A12014-02-13
WO2006070730A12006-07-06
Foreign References:
JP2011212786A2011-10-27
JP2008162009A2008-07-17
JP2007011815A2007-01-18
JP2013176837A2013-09-09
JP2008162009A2008-07-17
Other References:
See also references of EP 3549701A4
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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