High service performance equipment with lager wall thickness

multi structure and high service environment is widely applied in the field of marine equipment and national defense.Arc welding is a common welding method for these structures

while the characteristics of slow welding efficiency

large heat input and deformation limit its development prospect. At present

high energy beam laser is widely used in welding of thick wall components. The performance feature and development status of high-power laser device were introduced. The current laser welding technologies of high-power laser autogenously welding

laserMIG hybrid welding and narrow gap laser wire feeding welding and their application conditions were analyzed.Among them

narrow gap laser wire feeding welding has the advantages of large weldability thickness

strong adaptability and small deformation

which is considered as one of the suitable welding methods for thick wall components. The key techniques of all-position narrow gap laser wire feeding welding were emphatically introduced. Finally

the develop-ment potential of laser welding on the manufacturing field of lager thick-wall component was summarized and expected.