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:
Apr. 28, 2026
Filed:
Jun. 22, 2021
Baoshan Iron & Steel Co., Ltd., Shanghai, CN;
Xiaodong Zhu, Shanghai, CN;
Peng Xue, Shanghai, CN;
BAOSHAN IRON & STEEL CO., LTD., Shanghai, CN;
Abstract
Disclosed is a multi-layer composite cold-rolled steel plate, provided with an upper surface layer, a lower surface layer and at least one interlayer between the upper surface layer and the lower surface layer in the thickness direction of the steel plate, wherein the phase proportion of austenite in the microstructure of the upper surface layer and the lower surface layer is ≥95 %, and the at least one interlayer comprises at least one first interlayer, with the phase proportion of martensite in the microstructure of the first interlayer being ≥85 %. In addition, further disclosed is a method for manufacturing the multi-layer composite cold-rolled steel plate above, the method comprising the steps of: (1) preparing billets for various layers and assembling the billets; (2) rolling; (3) acid pickling and cold-rolling; (4) annealing; and (5) acid pickling and then heating.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile