In this paper

the butt welded joints of 10 mm AH36 steel under different welding parameters were obtained by laser arc hybrid welding

and the forming characteristics

microstructure and mechanical properties of weld under different welding parameters were analyzed. Based on the finite element software

the typical temperature field distribution of laser hybrid welding was obtained

and the welding deformation of 6 m×6 m×6 mm large panel was simulated. The results show that the laser power can significantly change the welding penetration

and also has a certain impact on the weld morp-hology;the influence of welding current on the penetration is less than that of the laser power

and the welding current has a great impact on the weld width and morphology;the weld zone of laser hybrid welding is mainly acicular ferrite and granular bainite

the microstructure of coarse grained zone is mainly granular bainite

ferrite and martensite;the change of laser power has little effect on the hardness of arc zone

but has certain effect on laser zone. The hardness of weld improves as the laser power increases

the increase of welding current makes the hardness of weld zone and heat affected zone decrease as a whole;The constraint position has an important effect on welding deformation

the closer the constraint position is to the weld center

the smaller the postweld deformation.