Title:
COATED CUTTING TOOL
Document Type and Number:
WIPO Patent Application WO/2019/065397
Kind Code:
A1
Abstract:
The coated cutting tool according to the present invention comprises a hard nitride coating that contains Ti at 70 atomic% to 95 atomic% and Si at 5 atomic% to 30 atomic% with respect to the total metallic element content, and Ar at 0.05 atomic% to 0.20 atomic% with respect to the total metallic and non-metallic element content, has an NaCl-type crystalline structure, exhibits maximum diffraction peak intensity in the (200) plane, and has an average crystal grain size of 5 nm to 30 nm. Defining 100 atomic% as the total of metallic elements, nitrogen, oxygen, and carbon in the composition of every 20 nm interval from a depth of 20 nm to 200 nm from the surface of the hard coating, the nitrogen content ratio is at least 50.0 atomic %. The flank of the coated cutting tool has an arithmetical mean high Sa of 0.1 μm or less, a maximum height Sz of 2.0 μm or less, and an arithmetic mean peak curvature Spc (1/mm) value of 5,000 or less, all as defined by ISO 25178.
Inventors:
SASAKI TOMOYA (JP)
Application Number:
PCT/JP2018/034600
Publication Date:
April 04, 2019
Filing Date:
September 19, 2018
Export Citation:
Assignee:
MITSUBISHI HITACHI TOOL ENG LTD (JP)
International Classes:
B23B27/14; B23B51/00; B23C5/16; B23D43/00; B23D77/00; B23F21/16; C23C14/06
Domestic Patent References:
| WO2017170536A1 | 2017-10-05 |
Foreign References:
| JP2011093085A | 2011-05-12 | |||
| JP2016084505A | 2016-05-19 | |||
| JP2016534217A | 2016-11-04 | |||
| JP2015033757A | 2015-02-19 | |||
| JP2015123530A | 2015-07-06 | |||
| JP2012045650A | 2012-03-08 | |||
| JP2002096206A | 2002-04-02 | |||
| JP2016107396A | 2016-06-20 | |||
| JP2017185677A | 2017-10-12 | |||
| JP2000334606A | 2000-12-05 | |||
| JP2008080447A | 2008-04-10 |
Other References:
See also references of EP 3689513A4
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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