Title:
SURFACE-COATED CUTTING TOOL
Document Type and Number:
WIPO Patent Application WO/2020/184352
Kind Code:
A1
Abstract:
In this surface-coated cutting tool: a hard coating layer is provided to the surface of a tool base body comprising a WC-based cemented carbide having WC particles as a hard phase component and Co as a bonding phase main component; an interface layer containing W, Cr, Co, and C is formed between the tool base body and the hard coating layer; a low-Co-containing region having a Co content of 0.1-2.5 mass% is formed in the interface layer from directly above the WC particles to a thickness position that is halfway through the interface layer in the layer thickness direction; a low-C-containing region having a C content of 0.1-0.8 mass% is formed in the interface layer from directly above the bonding phase to a thickness position that is halfway through the interface layer in the layer thickness direction; and the low-Co-containing region and the low-C-containing region are formed in an alternating manner in a direction parallel to the tool base body surface.
Inventors:
MAEKAWA TAKUYA (JP)
Application Number:
PCT/JP2020/009287
Publication Date:
September 17, 2020
Filing Date:
March 05, 2020
Export Citation:
Assignee:
MITSUBISHI MATERIALS CORP (JP)
International Classes:
B23B27/14; C23C14/06
Domestic Patent References:
| WO2015186503A1 | 2015-12-10 | |||
| WO2013018768A1 | 2013-02-07 |
Foreign References:
| JP2009061540A | 2009-03-26 | |||
| JPH10168583A | 1998-06-23 |
Attorney, Agent or Firm:
KIMURA Koichi et al. (JP)
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