Patents by Inventor Jin Takamura

Jin Takamura 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).

  • Process for production of titanium and titanium alloy material having fine equiaxial microstructure
    Patent number: 5092940
    Abstract: In the production of titanium and (.alpha.+.beta.)-type titanium alloy materials, a material hydrogenated in an amount of 0.02 to 2% by weight of hydrogen is worked at a temperature of 450.degree. to 900.degree. C. at a reduction of more than 60%, and the material is dehydrogenated and annealed in vacuum. The working of the titanium material is carried out at 450.degree. to 800.degree. C., and the working of the (.alpha.+.beta.)-type titanium alloy material is carried out at 550.degree. to 900.degree. C. Furthermore, in the production of titanium, .alpha.-type titanium alloy, and (.alpha.+.beta.)-type titanium alloy materials, a material hydrogenated in an amount of 0.02 to 2% by weight of hydrogen is subjected to a heat treatment wherein the material is heated at a temperature not lower than the .beta. transformation temperature and then cooled, the material is worked at a temperature of 450.degree. to 950.degree. C.
    Type: Grant
    Filed: March 16, 1990
    Date of Patent: March 3, 1992
    Assignee: Nippon Steel Corporation
    Inventors: Kinichi Kimura, Masayuki Hayashi, Mitsuo Ishii, Hirofumi Yoshimura, Jin Takamura