CO₂ welding with an additional cold filler wire

Abstract

The results of investigations carried out to improve the quality of the CO₂ welding process with an additional filler wire (AFW), fed into the tail part of the molten pool in the cold state, are presented. The effect of the AFW on the quality of the produced bead is studied. The results of metallographic studies of the welded joint and also of the impact bend test are presented. When using the AFW, the quality of the welded joint is considerably higher with better external appearance of the welded joint, and the productivity of the process is also increased.

Keywords:

• MAG welding
• semi-automatic welding
• additional cold wire
• welding with additional wire
• carbon steel
• increasing of welding seam quality
• decrease of welding deformation
• macro-microscopic examination
• increasing of welding productivity
• impact test
• hardness test

Notes

Selected from Svarochnoe Proizvodstvo, 2015, 68 (9) 28–30.