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:
Apr. 21, 2025
Filed:
Feb. 05, 2020
Nippon Steel Corporation, Tokyo, JP;
Takafumi Yokoyama, Tokyo, JP;
Hiroyuki Kawata, Tokyo, JP;
Kunio Hayashi, Tokyo, JP;
Yuji Yamaguchi, Tokyo, JP;
Satoshi Uchida, Tokyo, JP;
NIPPON STEEL CORPORATION, Tokyo, JP;
Abstract
Provided are a hot dip galvanized steel sheet comprising a base steel sheet wherein the base steel sheet has a predetermined chemical composition, and contains ferrite: 50% or less, retained austenite: 30% or less, tempered martensite: 5% or more, fresh martensite: 10% or less, and pearlite and cementite in total: 5% or less, remaining structures consist of bainite, and a number ratio of tempered martensite with a Mn concentration profile satisfying [Mn]/[Mn]>1.2 and [Mn]/[Mn]<2.0 ([Mn] is the Mn content in the base steel sheet, [Mn]is the average Mn concentration in the tempered martensite, and [Mn]is the Mn concentration at the interfaces of different phases of the tempered martensite and ferrite phase and bainite phase) is 0.2 or more with respect to the total number of tempered martensite, and a method for producing the same.