Submergedarcarc

Submergedarcarc is not a standard term in welding literature; it most likely refers to Submerged Arc Welding (SAW). SAW is a welding process in which a continuously fed filler wire electrode is shielded by a granular flux that covers the molten weld and excludes air. The flux also forms a slag layer that protects the solidifying weld, which is why the arc and weld area appear to be submerged beneath the flux.

In SAW, the arc is struck between the electrode and the workpiece, with the weld pool protected by the flux. The process is highly automated and commonly used for long, straight joints on flat or horizontal positions. The welding head moves along the joint, and multiple passes may be used to build up thickness for thick sections.

Equipment for SAW includes a constant-voltage power source, a wire feeder, a flux hopper and delivery tube, and a welding head mounted on a track or portable carriage. The flux composition, particle size, and flux delivery rate influence penetration, deposition rate, slag detachability, and weld quality. The process is adaptable to various materials, sizes, and production requirements.

Materials and applications: SAW is widely used for carbon and low-alloy steels, stainless steels, and some nickel alloys, particularly in thick-section applications. Common uses include shipbuilding hulls, pressure vessels, pipelines, and structural steel components where high deposition rates and deep weld penetration are advantageous.

Advantages and limitations: SAW offers high deposition rates, deep penetration, stable arc behavior, and strong process automation. Limitations include restriction to relatively flat or horizontal joint configurations, requirement for controlled flux handling and slag removal, and greater equipment footprint. Safety considerations focus on flux handling, fumes, and operational hazards associated with automated welding systems.