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:
Apr. 07, 1992
Filed:
Nov. 21, 1990
Shoji Tanaka, Kakogawa, JP;
Yukio Nishiyama, Akashi, JP;
Yasutaka Toya, Nara, JP;
Masaru Nishiguchi, Ashiya, JP;
Kawasaki Jukogyo Kabushiki Kaisha, Hyogo, JP;
Sumitomo Metal Industries, Ltd., Osaka, JP;
Abstract
A superalloy disk to be utilized for a rotating body of an aircraft or turbine engine is manufactured by a casting mold provided with a cavity having an inner shape for forming a disk. A molten bath of superalloy melted under a vacuum or an inert gas atmosphere is poured into the casting mold under a vacuum or an inert gas atmosphere and the casting mold with the molten bath is stirred so as to prepare a rough casting of fine crystal grains by applying an external force such as an eccentric centrifugal force. The thus produced disk material may be heated thereafter. The rough casting is formed of crystal grains less than 100 .mu.m in diameter, and a rate of strain during the rotational forging is less than 10.sup.0 /sec. amd more than 10.sup.-2 /sec.