This research uses the gate type double wire submerged arc welding machine

welding wire diameter of 4.8 mm

fillet welding in the flat position

the welding process test of h-shaped steel body with a web thickness of 20 mm is carried out. The analysis of test results

and with the help of the mathematical model of the T joint

reasonably adjust welding angle

wire eccentric distance and the interrelation between the position of weld fusion zone

and set the welding angle and wire position according to the mathematical model

the web thickness of 20 mm of H-shaped steel

in the case of none groove

H-shaped steel combination of weld has reached the requirements of full penetration welds

UT inspection qualified. The mechanical properties of the specimens are sampled

the impact performance and hardness of the welded joints are in accordance with the requirements of the relevant specifications

and the metallographic structure is well formed from macroscopic and microscopic metallographic analysis.