Patents Assigned to Hitachi Carbide Tools, Inc.
  • Process for producing a tough cermet
    Patent number: 4904445
    Abstract: A tough cermet made from 20-92 weight % of TiC and/or TiCN, 5-50 weight % of WC and 3-30 weight % of an iron-gorup metal. This tough cermet has a three phase grain microstructure and is made is mixing titanium carbonitride powder and up to 70 weight % of the total amount of the tungsten carbide fine powder. The resulting mixture is melted to form a solid solution, pulverized, mixed with the remaining amount of tungsten carbide fine powder, and sintered at temperatures of 1325.degree.-1650.degree. C.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: February 27, 1990
    Assignees: Hitachi Metals, Ltd., Hitachi Carbide Tools, Inc.
    Inventors: Yusuke Iyori, Hisaaki Ida