Submerged Arc Welding Flux
Welding flux for SAW is a granular material that covers the arc and influences weld metal properties. It prevents radiation losses and contamination.
Physical-Chemical Mechanism of Action
The SAW welding powder consists of fine metal particles that completely cover the arc during welding. These particles react with the molten pool and influence the composition of the shielding gases. They prevent radiation loss through the powder and ensure no contaminants enter the welding process.
Metallurgical Relevance & Risks in Welding
The right SAW welding powder improves weld quality by providing an optimal gas environment and preventing contaminants that could cause cracks or weak points. However, the wrong powder selection can mean the molten pool is not properly covered, leading to radiation loss and insufficient shielding gas supply.
Workshop Practice & Instructions
Use SAW welding powder with a particle size of 20 to 45 micrometers. Make sure the powder completely covers the arc and that the shielding gas properties are optimal. Check powder quality regularly and replace it if contaminated or if the particle size is too large.