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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 12779821 B1

PDFFull Text
Date of Patent:
Nov. 03, 2026

Filed:

Feb. 17, 2023

High-strength steel composite galvanized sheet resistant to lme cracking during spot welding, and preparation method therefor

Applicant:

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

Inventors:

Ming Lei, Shanghai, CN;

Hua Pan, Shanghai, CN;

Li Wang, Shanghai, CN;

Peng Xue, Shanghai, CN;

Zhongqu Sun, Shanghai, CN;

Tianhai Wu, Shanghai, CN;

Chengjie Liu, Shanghai, CN;

Yue Wu, Shanghai, CN;

Zhongling Wen, Shanghai, CN;

Assignee:

BAOSHAN IRON & STEEL CO., LTD., Shanghai, CN;

Attorneys:

Lei Fang, Esq.

Smith Tempel Blaha LLC

Primary Examiner:

Katherine A Christy

Int. Cl.
CPC ...
B32B 15/01 (2006.01); C21D 8/02 (2026.01); C21D 8/0221 (2026.01); C21D 8/0247 (2026.01); C21D 9/46 (2006.01);
U.S. Cl.
CPC ...
B32B 15/013 (2013.01); C21D 8/02 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0263 (2013.01); C21D 9/46 (2013.01); B32B 2311/20 (2013.01);
Abstract

A high-strength steel composite galvanized sheet resistant to LME cracking during spot welding, and a preparation method therefor, wherein the high-strength steel composite galvanized sheet comprises a high-strength steel body (), low-carbon steel composite layers () and a galvanized layer (), wherein two low-carbon steel composite layers () are respectively compounded and rolled on two surfaces of the high-strength steel body (), the galvanized layer () is formed on the surface of at least one low-carbon steel composite layer (), and a high-strength steel composite galvanized sheet is thus formed. The sensitivity of the high-strength steel composite galvanized sheet to LME during spot welding is reduced, LME cracking during spot welding is effectively avoided, the resistance spot-welding performance of the high-strength steel body is improved, and the mechanical properties of a spot-welded joint are obviously improved.

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Lei, Ming. (2026). High-strength steel composite galvanized sheet resistant to lme cracking during spot welding, and preparation method therefor (U.S. Patent No. 12779821). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12779821

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