Advantages and disadvantages of SAW process

Submerged arc welding is an arc welding process that uses an arc or arcs between a flux covered bare metal electrode(s) and the weld pool. The arc and molten metal are shielded by a blanket of granular flux, supplied through the welding nozzle from a hopper.

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The process is used without pressure and filler metal from the electrode and sometimes from a supplemental source (welding rod, flux, or metal granules).

SAW can be applied in three different modes: semiautomatic, automatic, and machine. It can utilize either a CV or CC power supply. SAW is used extensively in shop pressure vessel fabrication and pipe manufacturing.

Advantages

  • Very High Deposition rates
  • High and consistent quality

Disadvantages

  • High current and 100% duty cycle
  • The weld is hidden by flux making it harder to control
  • Equipment is costly and not very portable
  • Limited to shop work in the flat position
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