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Title:
SURFACE COATED CUTTING TOOL
Document Type and Number:
WIPO Patent Application WO/2018/105403
Kind Code:
A9
Abstract:
A surface coated cutting tool comprises a base material made of a cemented carbide and a coating. The coating includes an intermediate layer in contact with the base material, and an upper layer formed on the intermediate layer. The upper layer is a single layer comprising an upper basal layer that is a layer in contact with the intermediate layer or a multilayer of two or more layers including the upper basal layer. The crystal system of the base material is a hexagonal crystal system. The intermediate layer and the upper basal layer have a NaCl-type crystal structure. The thickness of the intermediate layer is 3 nm to 10 nm, inclusive. The interplanar spacing mismatch in the boundary region of the base material and the intermediate layer is 65% or less than the theoretical value of the interplanar spacing mismatch between the base material and the upper basal layer. The interplanar spacing mismatch in the boundary region of the intermediate layer and the upper basal layer is 65% or less than the theoretical value of the interplanar spacing mismatch between the base material and the upper basal layer.

Inventors:
TANAKA, Keizo (1-1 Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
SETOYAMA, Makoto (1-1 Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
FUKUI, Haruyo (1-1 Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
KOBAYASHI, Akira (2500-5, Oazaoogohara, Komono-cho, Mie-gu, Mie 22, 〒5101222, JP)
KURAMOCHI, Koji (1-1, Koyakita 1-chome, Itami-sh, Hyogo 16, 〒6640016, JP)
Application Number:
JP2017/042036
Publication Date:
August 16, 2018
Filing Date:
November 22, 2017
Export Citation:
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Assignee:
SUMITOMO ELECTRIC HARDMETAL CORP. (1-1 Koyakita 1-chome, Itami-shi Hyogo, 16, 〒6640016, JP)
SUMITOMO ELECTRIC INDUSTRIES, LTD. (5-33, Kitahama 4-chome Chuo-ku, Osaka-sh, Osaka 41, 〒5410041, JP)
International Classes:
B23B27/14; B23B51/00; B23C5/16; B23D77/00; B23F21/00; B23G5/06; C23C14/06
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (Nakanoshima Festival Tower West, 2-4 Nakanoshima 3-chome, Kita-ku, Osaka-sh, Osaka 05, 〒5300005, JP)
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