Title:
【発明の名称】靭性に優れたWC基超硬合金および硬質層被覆超硬合金
Document Type and Number:
Japanese Patent JP3123067
Kind Code:
B2
Abstract:
PURPOSE:To manufacture a WC base sintered hard alloy excellent in toughness and chipping resistance, in a WC base sintered hard alloy composed of a hard phase essentially consisting of WC and a bonding phase constituted of Co, by specifying the componental compsn. and structure of the hard phase. CONSTITUTION:In a WC base sintered hard alloy composed of a hard phase essentially consisting of WC and a bonding phase constituted of WC, the componental compsn. of the hard phase lies in the range obtd. by connecting A, B, C and D in a WC-TiC-TiN ternary diagram by straight lines. Furthermore, the structure of the hard phase is composed of the three phases a WC phase having 0.5 to 5.0mum average grain size, a double solid soln. carbon nitride phase of W and Ti having 0.5 to 3.0mum average grain size and a TiN phase having 0.5 to 3.0mum average grain size. Moreover, in the ternary diagram, A, B, C and D are points shown by A (by mol, 85% WC-2% TiC-13% TiN), B (45% WC-35% TiC-20% TiN), C (25% WC-15% TiC-60% TiN) and D (38% WC-2% TiC-60% TiN).
Inventors:
Hironori Yoshimura
Shogo Inada
Munenori Nakajima
Shogo Inada
Munenori Nakajima
Application Number:
JP23508290A
Publication Date:
January 09, 2001
Filing Date:
September 05, 1990
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
B23P15/28; C22C1/05; C22C29/00; C22C29/02; C22C29/08; C23C16/30; C23C28/04; (IPC1-7): C22C29/08; B23P15/28; C22C1/05; C23C16/30; C23C28/04
Domestic Patent References:
| JP6389666A | ||||
| JP222454A | ||||
| JP4128378A |
Attorney, Agent or Firm:
Kazuo Tomita (1 person outside)