US 12,304,006 B2
Simplified method for welding 5G position filler layer of marine riser and product thereof
Lianyong Xu, Tianjin (CN); Kangda Hao, Tianjin (CN); Yongdian Han, Tianjin (CN); Lei Zhao, Tianjin (CN); Wenjing Ren, Tianjin (CN); and Hongyang Jing, Tianjin (CN)
Assigned to Tianjin University, Tianjin (CN)
Filed by Tianjin University, Tianjin (CN)
Filed on May 23, 2024, as Appl. No. 18/671,997.
Claims priority of application No. 202310614610.X (CN), filed on May 25, 2023.
Prior Publication US 2024/0391031 A1, Nov. 28, 2024
Int. Cl. B23K 28/02 (2014.01); B23K 9/173 (2006.01); B23K 26/082 (2014.01); B23K 101/10 (2006.01)
CPC B23K 28/02 (2013.01) [B23K 9/173 (2013.01); B23K 26/082 (2015.10); B23K 2101/10 (2018.08)] 8 Claims
OG exemplary drawing
 
1. A simplified method for welding a plurality of 5G position filler layers of a marine riser, comprising:
performing 5G position filler welding on the marine riser to form a plurality of filler layers using an oscillation scanning laser-GMAW hybrid welding process;
a laser beam introduced by the oscillation scanning laser-GMAW hybrid welding process in a circular scanning manner;
wherein, welding parameters of the oscillation scanning laser-GMAW hybrid welding process comprise: a power of the laser beam in the oscillation scanning laser-GMAW hybrid welding process is 1 kW to 2 kW, a welding speed in the oscillation scanning laser-GMAW hybrid welding process is 500 mm/min to 800 mm/min, and a scanning radius of the laser beam is 1 mm to 3.5 mm,
wherein the welding parameters are the same for each of the plurality of filler layers;
forming a welding molten pool and increasing an arc force through interaction between laser beam and the arc by the laser beam acting on a groove of the marine riser; and
expanding a range of the welding molten pool through an oscillation scanning behavior of the laser beam.