Patents by Inventor Fujimitsu Masuyama

Fujimitsu Masuyama 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 producing a high strength high-Cr ferritic heat-resistant steel
    Patent number: 4799972
    Abstract: A high-strength high-Cr ferritic, heat-resistant steel exhibiting improved high-temperature, long-term creep strength and a process for producing the same are disclosed. The steel consists essentially of, by weight %:C: not more than 0.2%,Si: not more than 1.0%,Mn: 0.1-1.5%,P: not more than 0.03%,S: not more than 0.03%,Ni: not more than 1.0%,Cr: 5.0-15%,Mo: 0.02-3.0%,W: not more than 4.0%,sol. Al: 0.005-0.04%,N: not more than 0.07%,at least one of V: 0.01-0.4% and Nb: 0.01-0.3%,B: 0-0.02%,at least one of Ca, Ti, Zr, Y, La, and Ce: 0-0.2%, andthe balance Fe and incidental impurities, the A.sub.cl point defined by Formula (1) below being 820.degree. or higher.A.sub.cl (.degree.C.)=765-500 C-450N+30Si-25 Mn+25 Mo+15W+11Cr+50V+30Nb-30Ni+30 sol. Al (weight %).
    Type: Grant
    Filed: October 10, 1986
    Date of Patent: January 24, 1989
    Assignees: Sumitomo Metal Industries, Ltd., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Fujimitsu Masuyama, Takashi Daikoku, Hisao Haneda, Kunihiko Yoshikawa, Hiroshi Teranishi, Atsuro Iseda