Title:
超硬合金及びその製造方法、並びに超硬工具
Document Type and Number:
Japanese Patent JP5314807
Kind Code:
B1
Abstract:
[Problem] To improve the lubricating properties of a superhard alloy that constitutes a tool base, while maintaining the mechanical strength. [Solution] A superhard alloy which comprises tungsten carbide (WC) and a binding metal that bonds the grains of the WC to one another, wherein at least some of the WC grains have a two-layer structure composed of a WC core and a tungsten-carbonitride peripheral structure formed on the periphery of the WC core and have been thereby made to have the ability to reduce friction. This superhard alloy is produced from a superhard-alloy raw-material powder obtained by mixing a WC powder with a binding metal powder for bonding WC grains. The superhard-alloy raw-material powder is compacted to form a powder compact. The powder compact is sintered by heating and is nitrided in a pressurized nitrogen atmosphere. Thus, a superhard alloy is obtained in which at least some of the WC grains have a two-layer structure composed of a WC core and a tungsten-carbonitride peripheral structure.
Inventors:
Iwasaki Masahiro
Application Number:
JP2013010041A
Publication Date:
October 16, 2013
Filing Date:
January 23, 2013
Export Citation:
Assignee:
Sun Alloy Industry Co., Ltd.
International Classes:
C22C29/08; B22F1/00; B22F7/00; B23B27/14; C22C1/05
Domestic Patent References:
| JP2013010997A | 2013-01-17 | |||
| JP2009154224A | 2009-07-16 | |||
| JP2012144804A | 2012-08-02 | |||
| JPS61272380A | 1986-12-02 | |||
| JPH10237650A | 1998-09-08 | |||
| JP2013010997A | 2013-01-17 | |||
| JP2009154224A | 2009-07-16 | |||
| JP2012144804A | 2012-08-02 | |||
| JPS61272380A | 1986-12-02 |
Attorney, Agent or Firm:
Eiichi Tamura