US Patent Issued to PROTERIAL on April 7 for "Production method for ring-rolled material of Fe-Ni-based superalloy" (Japanese Inventors)

ALEXANDRIA, Va., April 7 -- United States Patent no. 12,594,593, issued on April 7, was assigned to PROTERIAL LTD. (Tokyo).

"Production method for ring-rolled material of Fe-Ni-based superalloy" was invented by Chuya Aoki (Tokyo), Tsuyoshi Fukui (Tokyo), Daigo Ohtoyo (Tokyo), Etsuo Fujita (Tokyo), Naoyuki Iwasa (Tokyo) and Taku Hirosawa (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for producing a ring-rolled material of an Fe-Ni based superalloy, which has a high circularity, can inhibit AGG, and can inhibit grain growth. A method for producing a ring-rolled material of an Fe-Ni based superalloy having a composition of an Alloy 718 comprises: a finishing ring rolling step of heating a ring-...