Patents by Inventor Keiichi Wakashima

Keiichi Wakashima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Tungsten carbide-base hard alloy for hot-working apparatus members
    Patent number: 4466829
    Abstract: A WC-Ni-Co-Al-Cr system hard alloy suitable as a material for hot working apparatus members has a lower Co content than conventionally used WC-Co system alloys and contains in place thereof greater quantities of Ni and Al, whereby, and also because the oxygen content is suppressed at a low level, fine particles of .gamma.' phase (Ni.sub.3 Al) are precipitated in a binder phase which binds the disperse phase of WC to impart characteristics such as excellent toughness, abrasion resistance, high-temperature strength, and oxidation resistance.
    Type: Grant
    Filed: April 2, 1982
    Date of Patent: August 21, 1984
    Assignee: Mitsubishi Kinzoku Kabushiki Kaisha
    Inventors: Kenichi Nishigaki, Magoichi Takahashi, Keiichi Wakashima