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:
Feb. 03, 2026
Filed:
Mar. 31, 2022
Baoshan Iron & Steel Co., Ltd., Shanghai, CN;
Jun Li, Shanghai, CN;
Jian Wang, Shanghai, CN;
Junfei Wang, Shanghai, CN;
Chao Wang, Shanghai, CN;
Baoping Zhang, Shanghai, CN;
Huafei Liu, Shanghai, CN;
Jingge Dai, Shanghai, CN;
Yimin Liu, Shanghai, CN;
Fengzhi Lu, Shanghai, CN;
Honglin Yang, Shanghai, CN;
BAOSHAN IRON & STEEL CO., LTD., Shanghai, CN;
Abstract
A low-carbon, low-alloy and high-formability dual-phase steel having a tensile strength of greater than or equal to 590 MPa, a hot-dip galvanized dual-phase steel, and a manufacturing method therefor. The steel comprises the following components, in percentage by mass: 0.04-0.12% of C, 0.1-0.5% of Si, 1.0-2.0% of Mn, P≤0.02%, S≤0.015%, 0.02-0.06% of Al, and can further comprise one or two of Cr, Mo, Ti, Nb and V, wherein Cr+Mo+Ti+Nb+V≤0.5%, and the balance is Fe and other unavoidable impurities. The manufacturing method includes smelting, casting, hot rolling, cold rolling, and rapid heat treatment processes. With the present invention, the recovery of a deformed structure, recrystallization and austenite transformation processes are changed, the nucleation rate is increased, the grain growth time is shortened, grains are refined, the strength and n value of the material are improved, and the interval range of the material performance is expanded.