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:
Mar. 14, 2017
Filed:
Dec. 10, 2012
Mitsubishi Materials Corporation, Tokyo, JP;
Hideo Takizawa, Kitamoto, JP;
Yuji Ishiwari, Okegawa, JP;
Hiroaki Kikuchi, Okegawa, JP;
Jun Ohsone, Kitamoto, JP;
MITSUBISHI MATERIALS CORPORATION, Tokyo, JP;
Abstract
A method of manufacturing an annular material includes: a forging process of making a discoid forged material by forging an alloy material; and a ring rolling process of making an annular material by performing ring rolling on an annular intermediate made by forming a through-hole in the forged material. In the forging process, hot forging which achieves an absolute value εθof a strain in a circumferential direction of the forged material that is greater than or equal to 0.3, an absolute value εh of a strain in a height direction of the forged material that is greater than or equal to 0.3, and a ratio εh/εθbetween the absolute values of the strains that is in a range of 0.4 to 2.5 is performed at least two or more times.