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:
Sep. 29, 2020
Filed:
Aug. 17, 2016
Nippon Steel Chemical & Material Co., Ltd., Tokyo, JP;
Hiroto Unno, Tokyo, JP;
Naoya Sawaki, Tokyo, JP;
Naoki Fujimoto, Tokyo, JP;
Masahiro Fukuda, Tokyo, JP;
Tomohiro Uno, Tokyo, JP;
Toru Inaguma, Tokyo, JP;
NIPPON STEEL CHEMICAL & MATERIAL CO., LTD., Tokyo, JP;
Abstract
The present invention provide a ferritic stainless steel foil having a high thickness precision even with a thickness 60 μm or less ultrathin stainless steel foil and simultaneously having a plastic deformation ability and good elongation at break, that is, having a good press-formability (deep drawing ability). The present invention is a stainless steel foil having a thickness of 5 μm to 60 μm, wherein a recrystallization ratio of said stainless steel foil is 90% to 100%, a surface layer of said stainless steel foil has a nitrogen concentration of 1.0 mass % or less, three or more crystal grains are contained in the thickness direction of said stainless steel foil, an average crystal grain diameter 'd' of said crystal grains is 1 μm to 10 μm, and, when said thickness is 't' (μm), an area ratio of crystal grains having a crystal grain diameter of t/3 (μm) or more is 20% or less.