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:
Oct. 21, 2014
Filed:
Dec. 20, 2012
Hitachi, Ltd., Tokyo, JP;
Jun Sato, Hitachi, JP;
Shinya Imano, Hitachi, JP;
Hiroyuki Doi, Tokai-mura, JP;
Takashi Shibayama, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
It is an objective of the invention to provide a Ni-based forged alloy having good large ingot formability and good hot formability as well as high mechanical strength at high temperature. There is provided a Ni-based forged alloy comprising: 0.001 to 0.1 mass % of C; 0.001 to 0.01 mass % of B; 16 to 22 mass % of Cr; 0.5 to 1.5 mass % of Al; 0.1 to 6.0 mass % of W; 3.5 to 5.5 mass % of Nb; 0.8 to 3.0 mass % of Ti; 16 to 20 mass % of Fe; 2.0 mass % or less of Mo; and the balance including Ni and unavoidable impurities, in which: a segregation parameter Ps defined by a formula of 'Ps (mass %) =1.05×[Al concentration (mass %)]+0.6×[Ti concentration (mass %)]−0.8×[Nb concentration (mass %)]−0.3×[Mo concentration (mass %)]' satisfies a relationship of 'Ps≧−3.0 mass %'; and a total amount of W and Mo is 1.75 atomic % or less.