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:
Dec. 27, 2011
Filed:
Apr. 27, 2005
Shigeki Ueta, Nagoya, JP;
Toshiharu Noda, Nagoya, JP;
Ryuichi Yamamoto, Takasago, JP;
Yoshikuni Kadoya, Takasago, JP;
Ryotaro Magoshi, Takasago, JP;
Shin Nishimoto, Tokyo, JP;
Shigeki Ueta, Nagoya, JP;
Toshiharu Noda, Nagoya, JP;
Ryuichi Yamamoto, Takasago, JP;
Yoshikuni Kadoya, Takasago, JP;
Ryotaro Magoshi, Takasago, JP;
Shin Nishimoto, Tokyo, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A method for producing a low thermal expansion Ni-base superalloy including the steps of subjecting the alloy to a solution heat treatment under the condition of at a temperature of 1000 to 1200° C. and subjecting the alloy to either a carbide stabilizing treatment for making aggregated carbides on grain boundaries and stabilizing the carbides under the conditions of at a temperature of not less than 850° C. and less than 1000° C. and for 1 to 50 hours, or a carbide stabilizing treatment for making aggregated carbides on grain boundaries and stabilizing the carbides by cooling from the temperature in the solution heat treatment to 850° C. at a cooling rate of 100° C. or less per hour. The method also including the steps of subjecting the alloy to a first aging treatment for precipitating y' phase under the conditions of at a temperature of 720 to 900° C. and for 1 to 50 hours, and subjecting the alloy to a second aging treatment for precipitating AB phase under the conditions of at a temperature of 550 to 700° C. and for 5 to 100 hours.