ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,434,326, issued on Oct. 7, was assigned to FCA US LLC (Auburn Hills, Mich.).
"Method for friction stir welding or processing high strength steel" was invented by Bryan Macek (Rochester Hills, Mich.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method of processing high-strength steel includes providing a first piece of high-strength steel. Friction stir processing the first piece of high strength steel is performed by pre-heating an area in advance of a friction stir welding tool and moving the friction stir welding tool between 500 mm and 300 mm per minute to attain a mixed zone having a mixed zone temperature at the mixed zone between a eutectoid te...