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. 05, 1999
Filed:
Dec. 15, 1997
Norio Yuki, Kanagawa-ken, JP;
Yoshihisa Kita, Kanagawa-ken, JP;
Nippon Mining & Metals Co., Ltd., Tokyo, JP;
Abstract
Disclosed are Fe-Ni alloys used for electron gun parts and press punched electron guns, typically a electron gun electrode manufactured by press punching, comprising: all by weight, 30 to 55% of Ni; 0.0010 to 0.0200% of S; 0.1 to 0.8% of Mn; no more than 0.3% of Si; no more than 0.05% of Al; no more than 0.005% of O; and the balance of substantially Fe and inevitable impurities; said alloy preferably having a crystal grain size of not less than 7.0 in grain size number based on JIS G 0551. When oxide-type inclusions are included, Mn and S which form MnS combine with the oxide-type inclusions, so that MnS which is effective for improvement of punching properties do not sufficiently precipitate. Therefore, the invention controls contents of elements forming oxides in proper ranges.