#|A|B|C|D|E|F|G|H|I|J|K|L|M|N|O|P|Q|R|S|T|U|V|W|X|Y|Z Index  

SAW - short version

Submerged Arc Welding.

SAW - long version

Submerged arc welding (SAW) is a common arc welding process. Originally devolved by the Linde - Union Carbide Company. It requires a continuously fed consumable solid or tubular (flux cored) electrode. The molten weld and the arc zone are protected from atmospheric contamination by being “submerged” under a blanket of granular fusible flux consisting of lime, silica, manganese oxide, calcium fluoride, and other compounds. When molten, the flux becomes conductive, and provides a current path between the electrode and the work. This thick layer of flux completely covers the molten metal thus preventing spatter and sparks as well as suppressing the intense ultraviolet radiation and fumes that are a part of the SMAW (shielded metal arc welding) process.

SAW is normally operated in the automatic or mechanized mode, however, semi-automatic (hand-held) SAW guns with pressurized or gravity flux feed delivery are available. The process is normally limited to the Flat or Horizontal-Fillet welding positions (although Horizontal Groove position welds have been done with a special arrangement to support the flux). Deposition rates approaching 100 lb/h (45 kg/h) have been reported — this compares to ~10 lb/h (5 kg/h) (max) for shielded metal arc welding. Although Currents ranging from 300 to 2000 A are commonly utilized, currents of up to 5000 A have also been used (multiple arcs).

Single or multiple (2 to 5) electrode wire variations of the process exist. SAW strip-cladding utilizes a flat strip electrode (e.g. 60 mm wide x 0.5 mm thick). DC or AC power can be used, and combinations of DC and AC are common on multiple electrode systems. Constant Voltage welding power supplies are most commonly used; however, Constant Current systems in combination with a voltage sensing wire-feeder are available.


IQ Catch Banner


Definition in Chinese | Definition in French | Definition in Italian | Definition in Spanish | Definition in Dutch | Definition in Portuguese | Definition in German | Definition in Russian | Definition in Japanese | Definition in Greek | Definition in Turkish | Definition in Hebrew | Definition in Arabic | Definition in Swedish | Definition in Korean | Definition in Hindi | Definition in Vietnamese | Definition in Polish | Definition in Thai