Patents Examined by L. Dewayner Rutledge
  • Patent number: 4878955
    Abstract: A stainless steel which exhibits substantially martensitic structure at room temperature was heated at a temperature of 550.degree. to 675.degree. for 1 to 30 hours. Then a reverse-transformed austenite phase appeared and a stainless steel having high strength and high elongation and being free from weld softening was obtained.
    Type: Grant
    Filed: June 23, 1988
    Date of Patent: November 7, 1989
    Assignee: Nisshin Steel Company, Ltd.
    Inventors: Kazuo Hoshino, Takashi Igawa