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:
Nov. 18, 2025
Filed:
Nov. 05, 2021
Jfe Steel Corporation, Tokyo, JP;
Shunsuke Yamamoto, Tokyo, JP;
Katsutoshi Takashima, Tokyo, JP;
Yusuke Okumura, Tokyo, JP;
Tomomi Kanazawa, Tokyo, JP;
Katsuya Hoshino, Tokyo, JP;
Takashi Kawano, Tokyo, JP;
Takako Yamashita, Tokyo, JP;
Hiroshi Matsuda, Tokyo, JP;
Yoichi Makimizu, Tokyo, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
Disclosed is a galvannealed steel sheet including: a Si-containing cold-rolled steel sheet containing Si in an amount of 0.1 mass % or more and 3.0 mass % or less; an Fe-based electroplating layer formed on at least one surface of the Si-containing cold-rolled steel sheet; and a galvannealed layer formed on the Fe-based electroplating layer, in which in an intensity profile measured by glow discharge optical emission spectrometry, I/Iis 0.30 or more, and an average value of C concentration in a region ranging from 10 μm to 20 μm in the thickness direction from the interface between the galvannealed layer and the Fe-based electroplating layer towards the Fe-based electroplating layer is 0.10 mass % or less.