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. 22, 2026
Filed:
Jun. 29, 2021
Baoshan Iron & Steel Co., Ltd., Shanghai, CN;
Xinyan Jin, Shanghai, CN;
Yong Zhong, Shanghai, CN;
Meng Chen, Shanghai, CN;
Xufei Li, Shanghai, CN;
Li Wang, Shanghai, CN;
BAOSHAN IRON & STEEL CO., LTD., Shanghai, CN;
Abstract
The present invention provides a method for manufacturing a hot-dip galvanized steel sheet, comprising performing a heat treatment step, a hot dip plating step, and an alloying treatment step on a steel sheet having high Si and Mn content. The heat treatment step comprises a first heating phase and a soaking phase; a first heating atmosphere of the first heating stage contains 0.01-0.5% of Oby volume, and the balance is Nand inevitable impurities; a soaking atmosphere of the soaking stage contains 0.5% or more of Hby volume, and the balance is Nand inevitable impurities; dew points of the first heating atmosphere and the soaking atmosphere are controlled to be ≥−20° C. the method of the present invention, a hot-dip galvanized steel sheet having both a plating layer of sufficient Fe content and a high elongation at break rate can be obtained.