The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 25, 1989
Filed:
Feb. 04, 1987
Masao Siga, Hitachi, JP;
Yutaka Fukui, Hitachi, JP;
Mitsuo Kuriyama, Ibaraki, JP;
Soichi Kurosawa, Hitachi, JP;
Katsumi Iijima, Hitachi, JP;
Nobuyuki Iizuka, Hitachi, JP;
Yosimi Maeno, Hitachi, JP;
Shintaro Takahashi, Hitachi, JP;
Yasuo Watanabe, Katsuta, JP;
Ryo Hiraga, Hitachiota, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A heat resistant steel of the present invention contains 0.05 to 0.2 wt. % of C, less than 0.5 wt. % of Si, less than 0.6 wt. % of Mn, 8 to 13 wt. % of Cr, 1.5 to 3 wt. % of Mo, 2 to 3 wt. % of Ni, 0.05 to 0.3 wt. % of V, 0.02 to 0.2 wt. % in total of either or both of Nb and Ta, 0.02 to 0.1 wt. % of N and the balance substantially Fe. Since a gas turbine of the present invention is constituted by members, such as discs, blades, shafts and so forth, made of alloys of this kind, the gas turbine has a structure in which it is possible to achieve a high level of creep rupture strength and Charpy impact value.