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:
Jan. 11, 2022
Filed:
Jun. 19, 2017
Baoshan Iron & Steel Co., Ltd., Shanghai, CN;
Huanrong Wang, Shanghai, CN;
Ana Yang, Shanghai, CN;
Jiansu Zhang, Shanghai, CN;
Wei Wang, Shanghai, CN;
BAOSHAN IRON & STEEL CO., LTD., Shanghai, CN;
Abstract
A 980 MPa-grade hot-rolled ferrite bainite dual-phase steel and a manufacturing method therefor. The chemical components of the steel comprise, in percentage by weight, 0.15-0.30% of C, 0.8-2.0% of Si, 1.0-2.0% of Mn, 0-0.02% of P, 0-0.005% of S, 0-0.003% of O, 0.5-1.0% of Al, 0-0.006% of N, 0.01-0.06% of Nb, 0.01-0.05% of Ti, and the balance of Fe and inevitable impurities. In addition, the chemical components meet the following relations: 0.05%≤Nb+Ti≤0.10%, and 2.5≤Al/C≤5.0. The microstructure of the steel is made of ferrite and bainite. The average grain size of the ferrite is 5-10 μm, and the equivalent grain size of the bainite is less than or equal to 20 μm. The yield strength of the steel is greater than or equal to 600 MPa, the tensile strength of the steel is greater than or equal to 980 Mpa, and the ductility is greater than or equal to 15%.