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. 26, 1991
Filed:
Sep. 29, 1989
Applicant:
Inventors:
Masaomi Tsuda, Kanagawa, JP;
Toshihiko Taniuchi, Kanagawa, JP;
Assignee:
Nippon Yakin Kogyo Co., Ltd., Kyobashi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22F / ;
U.S. Cl.
CPC ...
148 / ; 148 / ; 148 / ;
Abstract
An ingot of Fe-Ni series alloy comprising 30-80 wt % of NI or further 0.001-0.03 wt % and B and the balance of Fe is upset at a forging ratio of at least 1/1.2U, hot forged at a total sectional reduction ratio of at least 30% to form a slab, from which fine crystal grains are formed at final heat treating stage, whereby Fe-Ni series alloys for electronic and electromagnetic materials are economically produced without generating streaks at the etching.