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Title:
SURFACE COATED CUTTING TOOL HAVING HARD COATING LAYER EXHIBITING EXCELLENT CHIPPING RESISTANCE AND WEAR RESISTANCE
Document Type and Number:
WIPO Patent Application WO/2018/135513
Kind Code:
A1
Abstract:
In a surface coated cutting tool containing at least a TiAlCN layer, when expressed as a composition formula (Ti1-XAlX) (CYN1-Y), an average content ratio X of Al and an average content ratio Y of C (where X and Y are atom ratios) satisfy 0.60≤X≤0.95 and 0≤Y≤0.005, and an average content ratio Z of Cl in the total quantity of atoms constituting the TiAlCN phase (where Z is an atom ratio) satisfies 0.0001≤Z≤0.004. Respective interplanar distances d(111) and d(200) are calculated from an X-ray diffraction spectrum of the (111) plane and the (200) plane of a crystal grain having an NaCl type face-centered cubic structure in the TiAlCN layer, obtained by measuring the TiAlCN layer using an X-ray diffraction device, and an absolute value ΔA=|A(111)-A(200)| of the difference between A(111) and A(200), defined as A(111)=31/2d(111), A(200)=2d(200), satisfies 0.007Å≤ΔA≤0.05Å.

Inventors:
ISHIGAKI Takuya (Central Research Institute 1002-14, Mukohyama, Naka-sh, Ibaraki 02, 〒3110102, JP)
TATSUOKA Sho (Central Research Institute 1002-14, Mukohyama, Naka-sh, Ibaraki 02, 〒3110102, JP)
SATO Kenichi (Central Research Institute 1002-14, Mukohyama, Naka-sh, Ibaraki 02, 〒3110102, JP)
YANAGISAWA Kousuke (Central Research Institute 1002-14, Mukohyama, Naka-sh, Ibaraki 02, 〒3110102, JP)
NISHIDA Shin (Central Research Institute 1002-14, Mukohyama, Naka-sh, Ibaraki 02, 〒3110102, JP)
Application Number:
JP2018/001145
Publication Date:
July 26, 2018
Filing Date:
January 17, 2018
Export Citation:
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Assignee:
MITSUBISHI MATERIALS CORPORATION (3-2 Otemachi 1-chome, Chiyoda-ku Tokyo, 17, 〒1008117, JP)
International Classes:
B23B27/14; B23C5/16; C23C16/34; C23C16/36
Foreign References:
JP2006082207A2006-03-30
JP2016068252A2016-05-09
Other References:
TODT ET AL.: "Superior oxidation resistance, mechanical properties and residual stresses of an Al-rich nanolamellar Ti0.05A10.95N coating prepared by CVD", SURFACE & COATINGS TECHNOLOGY, vol. 258, 11 July 2014 (2014-07-11), pages 1119 - 1127, XP029020164
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