Title:
SUPERHARD ALLOY IMPARTED WITH LOW FRICTION ABILITY, METHOD FOR PRODUCING SAME, AND SUPERHARD TOOL
Document Type and Number:
WIPO Patent Application WO/2014/013715
Kind Code:
A1
Abstract:
The present invention is a superhard alloy in which particles of tungsten carbide (WC) are bound to each other through a binder metal, and in which crystal grains of hexagonal boron nitride (h-BN) are formed in a dispersed state in the binder metal that binds the particles of WC to impart a low friction ability to the superhard alloy. The superhard alloy is produced from a material that is prepared by mixing at least one B source component selected from the group consisting of B2O3, H3BO3, h-BN, WB and TiB2 with a powder mixture prepared by mixing a WC powder with a metal powder capable of binding particles of WC to each other so that the B source component can be dispersed in the powder mixture. A superhard alloy powder in which the B source component is mixed in a dispersed state is compression-molded to produce a compression-molded article. The compression-molded article is nitrided in a pressurized nitrogen atmosphere, thereby producing a superhard alloy in which crystal grains of hexagonal boron nitride (h-BN) are formed in a dispersed state in the binder metal that binds particles of WC to each other.
Inventors:
IKEBE MASAAKI (JP)
IWASAKI MASAHIRO (JP)
IWASAKI MASAHIRO (JP)
Application Number:
PCT/JP2013/004329
Publication Date:
January 23, 2014
Filing Date:
July 16, 2013
Export Citation:
Assignee:
SANALLOY INDUSTRY CO LTD (JP)
International Classes:
B23B27/14; B21D37/01; C22C1/05; C22C29/08
Domestic Patent References:
| WO2005087418A1 | 2005-09-22 |
Foreign References:
| JP2001259903A | 2001-09-25 | |||
| JPH08144045A | 1996-06-04 | |||
| JP2011051033A | 2011-03-17 | |||
| JP2000233324A | 2000-08-29 | |||
| JP2011194512A | 2011-10-06 | |||
| JP2010513037A | 2010-04-30 |
Attorney, Agent or Firm:
TAMURA, EIICHI (JP)
Eiichi Tamura (JP)
Eiichi Tamura (JP)
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