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:
May. 21, 2013
Filed:
Aug. 29, 2008
Toshihiro Uehara, Yasugi, JP;
Takehiro Ohno, Yasugi, JP;
Akihiro Toji, Yasugi, JP;
Takashi Sato, Kure, JP;
Gang Bao, Kure, JP;
Shinya Imano, Chiyoda-Ku, JP;
Hiroyuki Doi, Chiyoda-Ku, JP;
Toshihiro Uehara, Yasugi, JP;
Takehiro Ohno, Yasugi, JP;
Akihiro Toji, Yasugi, JP;
Takashi Sato, Kure, JP;
Gang Bao, Kure, JP;
Shinya Imano, Chiyoda-Ku, JP;
Hiroyuki Doi, Chiyoda-Ku, JP;
Hitachi Metals, Ltd., Tokyo, JP;
Babcock-Hitachi Kabushiki Kaisha, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Disclosed is a low-thermal-expansion Ni-based super-heat-resistant alloy for a boiler, which has excellent high-temperature strength. The alloy can be welded without the need of carrying out any aging treatment. The alloy has a Vickers hardness value of 240 or less. The alloy comprises (by mass) C in an amount of 0.2% or less, Si in an amount of 0.5% or less, Mn in an amount of 0.5% or less, Cr in an amount of 10 to 24%, one or both of Mo and W in such an amount satisfying the following formula: Mo+0.5 W=5 to 17%, Al in an amount of 0.5 to 2.0%, Ti in an amount of 1.0 to 3.0%, Fe in an amount of 10% or less, and one or both of B and Zr in an amount of 0.02% or less (excluding 0%) for B and in an amount of 0.2% or less (excluding 0%) for Zr, with the remainder being 48 to 78% of Ni and unavoidable impurities.