Title:
Surface coated cutting tool
Document Type and Number:
Japanese Patent JP5999362
Kind Code:
B2
Abstract:
The invention provides a coated cutting tool with excellent resistance to abnormal damage. A tool substrate formed by a composite sintered body of TiCN-based cermet and WC-based cemented carbide is coated by a hard coating layer, wherein (a) tip material formed by the WC-based cemented carbide forms a front cutter surface on the TiCN-based cermet surface and an iron group metal-rich layer is formed on the surface of the tip material, (b) at the interface of the WC-based cemented carbide and the hard coating layer of the front cutter surface near the tip, the content of iron group metal components of the WC-based cemented carbide near the interface is 1.2 to 3.0 times of that of the inner side of the WC-based cemented carbide, and (c) at the interface of the TiCN-based cermet and the WC-based cemented carbide, a concentration gradient of the iron group metal components is formed and the concentration gradually decreases from the side of the TiCN-based cermet to the interface. The content of the iron group metal components of the TiCN-based cermet near the interface is 0.1 to 0.7 times of that of the inner side of the WC-based cemented carbide.
Inventors:
Akihiro Murakami
Hidemitsu Takaoka
Akira Nagata
Hidemitsu Takaoka
Akira Nagata
Application Number:
JP2013049692A
Publication Date:
September 28, 2016
Filing Date:
March 12, 2013
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
B23B27/14; B22F7/00; C22C1/05; C22C29/04; C22C29/08; C23C16/40
Domestic Patent References:
| JP2011038174A | ||||
| JP2004353047A | ||||
| JP2006111890A | ||||
| JP2009083096A | ||||
| JP2007319964A | ||||
| JP2011235370A | ||||
| JP9291378A |
Foreign References:
| WO2009034716A1 | ||||
| WO2003083149A1 | ||||
| EP1892052A1 |
Attorney, Agent or Firm:
Kageyama Shuichi
Masayuki Miyake
Kurachi Yasuyuki
Kazuo Tomita
Masayuki Miyake
Kurachi Yasuyuki
Kazuo Tomita