US Patent Issued to JFE STEEL on June 24 for "Electrical steel strip friction stir welding method and method of producing electrical steel strip" (Japanese Inventors)

ALEXANDRIA, Va., June 25 -- United States Patent no. 12,337,408, issued on June 24, was assigned to JFE STEEL Corp. (Tokyo).

"Electrical steel strip friction stir welding method and method of producing electrical steel strip" was invented by Muneo Matsushita (Tokyo), Shohei Iwata (Tokyo) and Kai Tomita (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an electrical steel strip friction stir welding method that is able to inhibit the occurrence of coil joint fractures on a production line caused by deterioration of mechanical properties and shape of the coil joint while maintaining high work efficiency and that is also advantageous in terms of rotating tool durability. In the method, preheated...