US Patent Issued to JFE STEEL on Feb. 4 for "Hot-pressed member, cold-rolled steel sheet for hot pressing, and manufacturing methods therefor" (Japanese Inventors)

ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,215,405, issued on Feb. 4, was assigned to JFE STEEL Corp. (Tokyo).

"Hot-pressed member, cold-rolled steel sheet for hot pressing, and manufacturing methods therefor" was invented by Katsutoshi Takashima (Tokyo), Minoru Tanaka (Tokyo), Yoshie Obata (Tokyo) and Michitaka Sakurai (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a hot-pressed member that combines both high strength of 1850 MPa or more in TS and excellent delayed fracture resistance. A hot-pressed member comprises: a predetermined chemical composition; a microstructure in which a prior austenite average grain size is 8 micro metre or less, a volume fraction of martensite is ...