SAW is the process of undergoing welding arc obscure. In this mode, the welding arc burns obscured welder and is not exposed to radiation. Even heat recovery is more favorable – due to radiation losses are small.
In submerged arc welding supplies drive mechanism bare electrode in the form of endless wire welding in place. Electric arc burns obscured submerged arc that gradually strew in a safe rob.Prašek is partially dissolved in the slag, which covers and protects the weld formed threads. The filler material is bare electrode, which must be adjusted in composition to the base material and powder.
The EPP welding gives at a glance a nice weld, and later when he analyzes we see that the fine-grained structure, because of the slow cooling of the weld and well protected from the surrounding influences. Melting učunek while welding is high.
Characteristics of the process:
• Maximum productivity
• Very good protection weld
• automated welding takes place
• an extremely clean, even and smooth weld
• one varkom be made very large weld
• it is very suitable for surfacing of worn surfaces
Usefulness of the procedure:
• to produce thick and flat welds
• tanks and tank under high pressure
• thick-walled tubes with a larger diameter
• renovation of cylinders and various impellers
