Patents Assigned to Japan as Represented by Director General of Ministry of Education, Culture, Sports, Science and Technology National Research Institute for Metals
  • Consumable electrode gas shielded arc welding method and apparatus
    Patent number: 6653594
    Abstract: A gas having an arc current-voltage property that is different from a shielding gas is intermittently added to the shielding gas, an arc current is intermittently changed in proportion to an intermittent chemical composition change of the shielding gas at an arc generation region, and an arc generation point situated at a tip of a welding wire is displaced upwardly or downwardly along a groove of a base metal.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: November 25, 2003
    Assignees: Japan as represented by Director General of Ministry of Education, Culture, Sports, Science and Technology National Research Institute for Metals, Daihen Corporation, Nippon Sanso Corporation, Ishikawajima-Harima Heavy Industries Co., Ltd.
    Inventors: Terumi Nakamura, Kazuo Hiraoka, Chiaki Shiga, Hideyuki Yamamoto, Koji Nakamura
  • Process for producing catalyst for steam reforming of methanol
    Patent number: 6589909
    Abstract: A method by which a highly active catalyst for the steam reforming of methanol is efficiently produced by a simple process. The catalyst is produced from alloy fine particles obtained by first grinding an Al alloy containing quasi-crystals consisting of aluminum, copper and at least one metal atom selected from Fe, Ru and Os, and then leaching the ground Al alloy.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: July 8, 2003
    Assignee: Japan as represented by Director General of Ministry of Education, Culture, Sports, Science and Technology National Research Institute for Metals
    Inventors: Masatoshi Yoshimura, Yuzuru Takahashi, An-pang Tsai
  • Laser welding method
    Patent number: 6483072
    Abstract: The present invention is to provide a novel laser welding method, capable of preventing formation of a welding defect, and achieving a deep penetration by a low heat input so as to enable formation of a welding structure with a high strength and a high toughness even in the case of welding by a high power laser. A welding operation is executed with a periodical fluctuation adjustment so as to have a base output of 50% or more with respect to a peak output.
    Type: Grant
    Filed: March 12, 2001
    Date of Patent: November 19, 2002
    Assignees: Japan as Represented by Director General of Ministry of Education, Culture, Sports, Science and Technology National Research Institute for Metals, Ishikawajima-Harima Heavy Industries, Co., Ltd.
    Inventors: Susumu Tsukamoto, Isao Kawaguchi, Goro Arkane