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:
Feb. 14, 2017
Filed:
Nov. 22, 2011
Kazutoshi Yokoo, Tokyo, JP;
Daisuke Tanaka, Tokyo, JP;
Daisuke Kawada, Tokyo, JP;
Koshiro Niihara, Tokyo, JP;
Hiroki Takagi, Tokyo, JP;
Yujiro Watanabe, Tokyo, JP;
Hiroshi Nakajima, Tokyo, JP;
Kazutoshi Yokoo, Tokyo, JP;
Daisuke Tanaka, Tokyo, JP;
Daisuke Kawada, Tokyo, JP;
Koshiro Niihara, Tokyo, JP;
Hiroki Takagi, Tokyo, JP;
Yujiro Watanabe, Tokyo, JP;
Hiroshi Nakajima, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo, JP;
Abstract
The present invention relates to an impeller manufacturing method in which a thermal cycle is performed on an assembly body with a brazing material formed of a Ni-containing Au alloy being placed at a bond portion of at least two impeller constituent members. The thermal cycle includes a temperature increasing process with a temperature increasing rate of 20° C./hr. to 100° C./hr., the process including a first intermediate retention and a second intermediate retention each keeping the temperature, the first intermediate retention performed in a temperature range of 500° C. to 850° C. and the second intermediate retention performed in a temperature range of 850° C. to 950° C. (but not including 850° C.). In the thermal cycle, the temperature is increased in a temperature range exceeding 950° C. after the second intermediate retention at a rate lower than that before the second intermediate retention.