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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.:

US 11377711 B1

PDFFull Text
Date of Patent:
Jul. 05, 2022

Filed:

May. 24, 2013

780mpa cold-rolled duel-phase strip steel and method for manufacturing the same

Applicant:

Baoshan Iron & Steel Co., Ltd., Shanghai, IN;

Inventors:

Xiaodong Zhu, Shanghai, CN;

Xufei Li, Shanghai, CN;

Peifang Du, Shanghai, CN;

Assignee:

Baoshan Iron & Steel Co., Ltd., Shanghai, CN;

Attorney:

Quarles & Brady LLP

Primary Examiner:

Brian D Walck

Int. Cl.
CPC ...
C21D 9/52 (2006.01); C22C 38/38 (2006.01); C21D 8/02 (2006.01); C21D 8/00 (2006.01); C21D 6/00 (2006.01); C22C 38/02 (2006.01); C22C 38/06 (2006.01); C22C 38/22 (2006.01); C22C 38/26 (2006.01); C22C 38/28 (2006.01);
U.S. Cl.
CPC ...
C21D 9/52 (2013.01); C21D 6/002 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/005 (2013.01); C21D 8/0205 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C22C 38/02 (2013.01); C22C 38/06 (2013.01); C22C 38/22 (2013.01); C22C 38/26 (2013.01); C22C 38/28 (2013.01); C22C 38/38 (2013.01); C21D 2211/005 (2013.01); C21D 2211/008 (2013.01);
Abstract

The invention discloses a 780 MPa cold-rolled dual-phase strip steel having a microstructure of fine equiaxed ferrite matrix and martensite islands distributed homogeneously on the ferrite matrix, and comprising the following chemical elements in mass percentage: C: 0.06-0.1%; Si≤0.28%; Mn: 1.8-2.3%; Cr: 0.1-0.4%; Mo: not added when Cr≥0.3%; Mo=0.3—Cr when Cr<0.3%; Al: 0.015-0.05%; at least one of Nb and Ti elements, wherein Nb+Ti is in the range of 0.02-0.05%; and the balance amounts of Fe and other unavoidable impurities. Correspondingly, the invention also discloses a method for manufacturing the 780 MPa cold-rolled dual-phase strip steel. The 780 MPa cold-rolled dual-phase strip steel has high strength, superior elongation, good phosphating property and small anisotropy in mechanical properties.

Find Patent Forward Citations

Zhu, Xiaodong. (2022). 780mpa cold-rolled duel-phase strip steel and method for manufacturing the same (U.S. Patent No. 11377711). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/11377711

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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