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. 24, 1998
Filed:
Nov. 07, 1995
Takahiko Kato, Hitachinaka, JP;
Hideyo Kodama, Hitachinaka, JP;
Toshimi Matsumoto, Hitachinaka, JP;
Yasuhisa Aono, Hitachi, JP;
Tetsuya Nagata, Hitachi, JP;
Shigeo Hattori, Ibaraki-ken, JP;
Junya Kaneda, Hitachi, JP;
Shigeki Ono, Hitachi, JP;
Hitachi, Ltd, Tokyo, JP;
Abstract
A method of performing thermal working to metal material containing helium, which comprises the steps of previously feeding current through a thermally working portion of the metal material containing helium to thereby reduce a helium content in the portion without melting the portion and then heating and melting the portion to improve the defects of the metal structure of the metal material containing helium. As a result, the improvement and removal of defects of the metal structure can be achieved by reducing a helium content in the thermally working portion of the metal material.