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:
Sep. 19, 2023
Filed:
Oct. 14, 2019
The Florida State University Research Foundation, Inc., Tallahassee, FL (US);
Huigai Li, Shanghai, CN;
Ke Han, Tallahassee, FL (US);
Yan Xin, Tallahassee, FL (US);
Shaobo Zheng, Shanghai, CN;
Liuxing Wang, Shanghai, CN;
Qijie Zhai, Shanghai, CN;
THE FLORIDA STATE UNIVERSITY RESEARCH FOUNDATION, INC., Tallahassee, FL (US);
Abstract
Provided herein are techniques for making low-carbon steels with high surface hardness. A technique includes heating a low-carbon steel precursor material in a furnace to form molten steel material, increasing the free oxygen content of the molten steel material to a predetermined level, and then solidifying the molten steel material having the predetermined oxygen level to produce a steel structure by cooling the molten steel material at a predetermined cooling rate. The predetermined oxygen level and the predetermined cooling rate are effective to produce the low-carbon steel with a high surface hardness. The low-carbon steel may have inclusions smaller than about 1 μm.