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. 08, 2014
Filed:
Sep. 12, 2007
Akihiro Sato, Tsukuba, JP;
Hiroshi Harada, Tsukuba, JP;
Kyoko Kawagishi, Tsukuba, JP;
Toshiharu Kobayashi, Tsukuba, JP;
Tadaharu Yokokawa, Tsukuba, JP;
Yutaka Koizumi, Tsukuba, JP;
Yasuhiro Aoki, Tokyo, JP;
Mikiya Arai, Tokyo, JP;
Kazuyoshi Chikugo, Kawasaki, JP;
Shoju Masaki, Tokyo, JP;
Akihiro Sato, Tsukuba, JP;
Hiroshi Harada, Tsukuba, JP;
Kyoko Kawagishi, Tsukuba, JP;
Toshiharu Kobayashi, Tsukuba, JP;
Tadaharu Yokokawa, Tsukuba, JP;
Yutaka Koizumi, Tsukuba, JP;
Yasuhiro Aoki, Tokyo, JP;
Mikiya Arai, Tokyo, JP;
Kazuyoshi Chikugo, Kawasaki, JP;
Shoju Masaki, Tokyo, JP;
National Institute for Materials Science, , JP;
IHI Corporation, , JP;
Abstract
A Ni-based single crystal superalloy according to the invention has, for example, a composition including: 5.0 to 7.0 wt % of Al, 4.0 to 10.0 wt % of Ta, 1.1 to 4.5 wt % of Mo, 4.0 to 10.0 wt % of W, 3.1 to 8.0 wt % of Re, 0.0 to 2.0 wt % of Hf, 2.5 to 8.5 wt % of Cr, 0.0 to 9.9 wt % of Co, 0.0 to 4.0 wt % of Nb, and 1.0 to 14.0 wt % of Ru in terms of weight ratio; and the remainder including Ni and incidental impurities. In addition, the contents of Cr, Hf and Al are preferably set so as to satisfy the equation OP≧108. According to the Ni-based single crystal superalloy of the invention, high creep strength can be maintained and the oxidation resistance can be improved.