Title:
SURFACE-COATED CUTTING TOOL
Document Type and Number:
WIPO Patent Application WO/2023/190000
Kind Code:
A1
Abstract:
Provided is a surface-coated cutting tool including a composite carbonitride layer or a composite nitride layer of Ti, Al, and V having columnar crystal grains with an NaCl-type face-centered cubic structure, wherein: the composition thereof is (AlXVYTi1-X-Y)(CαN1-α) (where Xavg, Yavg, and αavg, serving as the average values of X, Y, and α, satisfy the expressions 0.600 ≤ Xavg ≤ 0.950, 0.010 ≤ Yavg ≤ 0.300, 0.610 ≤ Xavg + Yavg ≤ 0.990, and 0.0000 ≤ αavg ≤ 0.0050) and has crystal grains having an Al content variation; Xmax, serving as the average value of the maximum values Xmax* of X, and Xmin, serving as the average value of the minimum values Xmin* of X, in the crystal grains satisfy the expression 0.020 ≤ Xmax - Xmin ≤ 0.400; and the lattice coefficient A (nm), which is calculated from an XRD pattern, and A* (nm), which is A* = 0.4045 × Xavg + 0.4130 × Yavg + 0.4242 × (1-Xavg - Yavg), satisfy |A-A*| < 0.0010 (nm).
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Inventors:
YANAGISAWA KOSUKE (JP)
HOMMA HISASHI (JP)
HOMMA HISASHI (JP)
Application Number:
PCT/JP2023/011414
Publication Date:
October 05, 2023
Filing Date:
March 23, 2023
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP (JP)
International Classes:
B23B27/14; C23C16/34; C23C16/36
Domestic Patent References:
| WO2020137325A1 | 2020-07-02 |
Foreign References:
| JP2011224686A | 2011-11-10 | |||
| JP2001181826A | 2001-07-03 | |||
| JP2017030076A | 2017-02-09 | |||
| JP2016137549A | 2016-08-04 | |||
| JP2016064485A | 2016-04-28 |
Attorney, Agent or Firm:
KIMURA Koichi (JP)
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