Title:
COATED ULTRAFINE GRAIN CEMENTED CARBIDE, AND CUTTING TOOL OR ABRASION-RESISTANT MEMBER USING SAME
Document Type and Number:
WIPO Patent Application WO/2023/042777
Kind Code:
A1
Abstract:
Provided are a tool and the like excellent in abrasion resistance. A coated ultrafine grain cemented carbide drill 1 is produced by coating an ultrafine grain cemented carbide with a hard coating film by means of PVD or CVD, said coated ultrafine grain cemented carbide containing 70 to 99.4 wt% of hard phase, which is composed mainly of WC having an average grain size of 1.0 µm or less, relative to the total ultrafine grain cemented carbide, 0.1 to 30 wt% of grain growth inhibition phase, which is composed mainly of Ti (C, N) produced by carbonitriding of Ti oxides during sintering, relative to the total ultrafine grain cemented carbide, and 0.4 to 30 wt% of binder phase, which is composed mainly of at least one kind selected from the group consisting of Co, Ni, and Fe, relative to the total ultrafine grain cemented carbide, with the total of the hard phase, the grain growth inhibition phase, and the binder phase being 100 wt%.
Inventors:
TSUTSUMI TOMOHIRO (JP)
TAKADA MASAYUKI (JP)
MATSUBARA HIDEAKI (JP)
TAKADA MASAYUKI (JP)
MATSUBARA HIDEAKI (JP)
Application Number:
PCT/JP2022/033993
Publication Date:
March 23, 2023
Filing Date:
September 12, 2022
Export Citation:
Assignee:
NIPPON TOKUSHU GOUKIN CO LTD (JP)
UNIV TOHOKU (JP)
UNIV TOHOKU (JP)
International Classes:
C22C29/08; B22F1/00; B22F3/24; B22F5/00; B22F7/00; B23B27/14; B23B51/00; C22C1/051; C23C14/06; C23C14/08; C23C14/32; C23C14/34; C23C16/32; C23C16/34; C23C16/36; C23C16/40
Domestic Patent References:
| WO2021144998A1 | 2021-07-22 | |||
| WO2020070978A1 | 2020-04-09 | |||
| WO2012153858A1 | 2012-11-15 |
Foreign References:
| JP6227517B2 | 2017-11-08 | |||
| JP6786763B1 | 2020-11-18 | |||
| JP2019181586A | 2019-10-24 | |||
| JP2017164859A | 2017-09-21 |
Attorney, Agent or Firm:
PATENT PROFESSIONAL CORPORATION TOKYO UIT INTERNATIONAL (JP)
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