Title:
超硬合金および被覆超硬合金とその製造方法
Document Type and Number:
Japanese Patent JP4731645
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce cemented carbide and coated cemented carbide in which toughness, rigidity and hardness are compatible and excellent in thermal cracking resistance and impact strength and to provide a method for producing the same. SOLUTION: In cemented carbide in which a hard phase essentially consisting of at least one kind selected from the carbides (other than WC), nitrides and carbonitrides of the group IVa, Va and VIa elements in the Periodic Table and WC is dispersed into a bonding phase of iron-group metal including Co, the crystal structure of Co satisfies the following formula: O<=I(Co.hcp)/I (Co.fcc)<=0.1, where I(Co.hcp) denotes the X-ray diffraction intensity in the (101) face of Co with an hcp structure, and I(Co.fcc) denotes the X-ray diffraction intensity in the (111) face of Co with an fcc structure. This cemented carbide can be obtd. by sintering a prescribed raw material, once cooling it, heating the sintered body to a temp. just below the one in which a liq. phase appears, dipping it into a liq. and executing rapid cooling.
Inventors:
Hideki Moriguchi
Hiro Kazuhiro Se
Akihiko Ikegaya
Hiro Kazuhiro Se
Akihiko Ikegaya
Application Number:
JP3128299A
Publication Date:
July 27, 2011
Filing Date:
February 09, 1999
Export Citation:
Assignee:
Sumitomo Electric Hardmetal Corp.
International Classes:
B23B27/14; C22C29/08; B22F3/10; B22F7/00; B23P15/28; C22C1/05; C23C14/06; C23C16/30
Domestic Patent References:
| JP5839764A | ||||
| JP62238302A |
Attorney, Agent or Firm:
Hiroshi Yamano