Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
COATED CUTTING TOOL
Document Type and Number:
Japanese Patent JP2020040175
Kind Code:
A
Abstract:
To provide a cutting tool improved in wear resistance and chipping resistance and therefore having long tool life.SOLUTION: A coated cutting tool 5 is provided that includes a base material 1 and a coating layer 4 formed on the base material. The coating layer has a first composite nitride layer 2 containing a compound having a composition represented by (AlCr)N, and a second composite nitride layer 3 containing the compound having the composition represented by (AlCr)N. The average grain size of a grain composing the first composite nitride layer 2 is less than 100 nm, and the crystal system of the second composite nitride layer 3 is a cubic crystal. The ratio I(111)/I(200) of the peak intensity I(111) of (111) plane in the second composite nitride layer to the peak intensity I(200) of (200) plane in the second composite nitride layer 3 in an X-ray diffraction is 1.0 or more. Besides, the average grain size of the particle composing the second composite nitride layer is 100 nm or more, and the residual stress of the second composite nitride layer 3 is -10.0 GPa or more to 2.0 GPa or less.SELECTED DRAWING: Figure 1

Inventors:
KATAGIRI TAKAO
Application Number:
JP2018169819A
Publication Date:
March 19, 2020
Filing Date:
September 11, 2018
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
TUNGALOY CORP
International Classes:
B23B27/14; B23B51/00; B23C5/16; C23C14/06
Domestic Patent References:
JP2016032861A2016-03-10
JP2019501294A2019-01-17
JP2020078864A2020-05-28
Attorney, Agent or Firm:
Yoshiyuki Inaba
Toshifumi Onuki
Akihiko Eguchi
Kazuhiko Naito