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:
Aug. 14, 2018
Filed:
Jul. 10, 2015
China Steel Corporation, Kaohsiung, TW;
Chih-Pu Chang, Kaohsiung, TW;
Delphic Chen, Kaohsiung, TW;
Chih-Hung Ou, Kaohsiung, TW;
Jui-Fan Tu, Kaohsiung, TW;
Kuo-Cheng Yang, Kaohsiung, TW;
Lung-Jen Chiang, Kaohsiung, TW;
Ming-Chin Tsai, Kaohsiung, TW;
CHINA STEEL CORPORATION, Kaohsiung, TW;
Abstract
A method for manufacturing a high-strength and high-ductility steel includes steps in which an alloy steel is provided. The method continues with step in which the alloy steel is hot rolled, so that the microstructure of the alloy steel includes austenite, bainite and martensite. The method continues with step in which the hot-rolled alloy steel is annealed, so as to decompose bainite and martensite structures of the alloy steel into ferrite and austenite structures. The method continues with step in which the annealed alloy steel is cold rolled. The method continues with step in which the cold-rolled alloy steel is annealed, so as to manufacture a high-strength and high-ductility steel in a phase with 50% to 70% of residual austenite.