US Patent Issued to JFE STEEL, Kawasaki Jukogyo on Oct. 7 for "Friction stir spot welded joint and production method therefor, and friction stir spot welding method" (Japanese Inventors)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,434,327, issued on Oct. 7, was assigned to JFE STEEL Corp. (Tokyo) and Kawasaki Jukogyo K.K. (Hyogo, Japan).

"Friction stir spot welded joint and production method therefor, and friction stir spot welding method" was invented by Daiki Yamagishi (Tokyo), Katsutoshi Takashima (Tokyo), Hiroshi Matsuda (Tokyo), Ryoji Ohashi (Kobe, Japan), Yoshitaka Muramatsu (Kobe, Japan) and Takuya Fukuda (Kobe, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a friction stir spot welded joint having high cross tensile strength even in the case where a steel sheet having a soft surface layer is used as a material to be welded. An annular groove is formed on ...