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. 26, 2005
Filed:
Oct. 24, 2001
Manabu Noguchi, Kanagawa, JP;
Kei Matsuoka, Tokyo, JP;
Hiroshi Yakuwa, Kanagawa, JP;
Akira Uchino, Tokyo, JP;
Hideyuki Sakamoto, Tokyo, JP;
Michio Okabe, Aichi, JP;
Yoshiyuki Sawada, Aichi, JP;
Shigeki Ueta, Aichi, JP;
Manabu Noguchi, Kanagawa, JP;
Kei Matsuoka, Tokyo, JP;
Hiroshi Yakuwa, Kanagawa, JP;
Akira Uchino, Tokyo, JP;
Hideyuki Sakamoto, Tokyo, JP;
Michio Okabe, Aichi, JP;
Yoshiyuki Sawada, Aichi, JP;
Shigeki Ueta, Aichi, JP;
Ebara Corporation, Tokyo, JP;
Daido Tokushuko Kabushiki Kaisha, Aichi, JP;
Abstract
The present invention relates to a Ni base alloy having sufficient strength at high temperatures and high corrosion resistance at high temperatures in a high-temperature composite corrosive environment in which chlorination or sulfidation occurs simultaneously with high-temperature oxidation, without excessive cooling or surface protection. According to the present invention, a Ni base alloy having high-temperature strength and corrosion resistance includes Cr in a range of from 25 to 40 weight %, Al in a range of from 1.5 to 2.5 weight %, C in a range of from 0.1 to 0.5 weight %, W of 15 weight % or less, Mn of 2.0 weight % or less, Si in a range of from 0.3 to 6 weight %, Fe of 5% or less, and Ni of rest except inevitable impurities. When strength at high temperatures is allowed to be small, W is in a range of from 0 to 8%, and Si is in a range of from 0.3 to 1% or from 1 to 6%. In order to enhance strength at high temperatures, W is in a range of from 8 to 15, and Si is in a range of from 0.3 to 1% or from 1 to 6%.