US 12,240,052 B2
Friction pressure welding method
Hidetoshi Fujii, Osaka (JP); Huihong Liu, Osaka (JP); and Yoshiaki Morisada, Osaka (JP)
Assigned to OSAKA UNIVERSITY, Osaka (JP)
Appl. No. 18/028,000
Filed by OSAKA UNIVERSITY, Osaka (JP)
PCT Filed Sep. 1, 2021, PCT No. PCT/JP2021/032079
§ 371(c)(1), (2) Date Mar. 23, 2023,
PCT Pub. No. WO2022/064980, PCT Pub. Date Mar. 31, 2022.
Claims priority of application No. 2020-160467 (JP), filed on Sep. 25, 2020.
Prior Publication US 2023/0339039 A1, Oct. 26, 2023
Int. Cl. B23K 20/12 (2006.01); B23K 103/24 (2006.01)
CPC B23K 20/12 (2013.01) [B23K 2103/24 (2018.08)] 11 Claims
OG exemplary drawing
 
1. A friction welding method in which one member is abutted against another member and is made to slide in a state in which a welding pressure substantially perpendicular to the interface to be welded is applied, the friction welding method being characterized in that
the maximum sliding speed is 53 mm/sec or less, the difference in the temperature rising rate between a center portion and an outer peripheral portion at the interface to be welded is within 10° C./sec, and the difference between the maximum attained temperatures between the center portion and the outer peripheral portion at the interface to be welded is within 50° C.