Special features of thermal and deformation processes in welding high-strength steels with different edge preparation

Abstract

Investigations were carried out into the special features of thermal and deformation processes in single- and twin-arc welding of joints with different edge reparation. On the basis of the experimental results it was established that deformation of all types when using the constricted shapes of the welding gap is lower than when using the standard welding gaps. The level of strain in the component can be additionally reduced by the application of twin-arc welding. The investigation results also show that in the final stage of welding it is necessary to correct the welding conditions in the immediate vicinity of the edge of the welded component in order to eliminate the superheating effect caused by the reflection of the heat flow from the welding edge.

Keywords:

• Twin-arc welding
• narrow bevelling
• high-strength steel
• housing design
• angular deformation
• heat flow reflection
• cold crack
• welding productivity

Notes

Selected from Svarochnoe Proizvodstvo, 2015, 68 (9) 7–12.