JFE. has been granted a patent for a high-strength steel sheet with a tensile strength of 1,320 MPa or more. The sheet features a microstructure of 92-100% martensite and bainite, and specific chemical composition requirements, including controlled levels of titanium and niobium. GlobalData’s report on JFE gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on JFE, Polymer electrolyte fuel cells was a key innovation area identified from patents. JFE's grant share as of July 2024 was 53%. Grant share is based on the ratio of number of grants to total number of patents.
High-strength steel sheet with specific microstructure and composition
The patent US12071682B2 describes a steel sheet characterized by a specific chemical composition and microstructure, which includes martensite and bainite. The composition specifies ranges for various elements, including carbon (C), manganese (Mn), niobium (Nb), and titanium (Ti), among others, with a total area fraction of martensite and bainite between 92% and 100%. The steel sheet is designed to have a tensile strength of at least 1,320 MPa and must meet certain conditions regarding inclusion particles and local phosphorus concentration. Additionally, the claims outline optional elements that can be included in the composition, such as copper (Cu), nickel (Ni), chromium (Cr), and others, which may enhance the properties of the steel.
The patent also details a method for producing this steel sheet, which involves continuous casting, hot-rolling, cold-rolling, and continuous annealing processes. Specific parameters are provided for each step, including temperature ranges and cooling rates, to ensure the desired microstructure and mechanical properties are achieved. The method allows for the application of a zinc-coated layer on the surface of the steel sheet, enhancing its corrosion resistance. Furthermore, the patent includes claims for producing members from the steel sheet through forming and welding processes, indicating its potential applications in various industries.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
