Submerged Arc Welding: 3 Technique Variations That Can Change Results
Originally developed by the Linde-Union Carbide Company, submerged arc welding has gained a considerable amount of popularity in welding heavy machinery and equipment like tractors and multi-head rigs. Submerged arc welding can meet numerous industry standards, as it can offer over 150 combinations of welding flux and wire designs. This article will explore what submerged arc welding is and 3 technique variations that can be implemented to change the results.
The Basics of Submerged Arc Welding
Unlike other welding processes, submerged arc welding is completed underneath a protective blanket of flux, which eliminates any exposed arc radiation and the need for welding screens. The arc during this welding process is held flat throughout and is also maintained by being placed at the end of a bare wire electrode and the weld. In the meantime, the electrode is constantly being fed into the arc. The trick to submerged arc welding is to feed the wire into the arc at the same rate at which the electrode is melting. Submerged arc welding can be competed with either a fully automatic or a semi-automatic.
Submerged arc welding is beneficial as it creates strong and sound welds that will last a lifetime while emitting minimal amounts of fumes. There is less distortion in this welding process as well, and high deposition rates are possible. Deep weld penetration is also possible.
Technique Variations That Can Affect Results
One of the top benefits of a submerged arc welding process is the fact that it can be used in a variety of different ways to achieve different results based on the needs and expectations of the project. 3 different technique variations are quite common in the industry. They include:
- Using multi-wire systems. Multi-wire systems are actually extremely advantageous in submerged arc welding because they allow for more electrodes to be used. This will help increase and improve deposition rates and travel speeds. Depending on the project, multi-wire systems can be accomplished by using a single power source or by using a separate power source for each wire.
- Using multiple power sources. Multiple power sources allow for both alternating current and direct current to be used at the same time. Generally speaking, alternating current is typically used when three wires are in tandem with one another. Using multiple power sources will also be beneficial for three-phase power systems and for working on high-speed longitudinal seams on large pipes.
- Using strip electrodes during the surfacing process. This helps welders to save a considerable amount of money on the project. This is because the strip electrodes will create a corrosion-resistant overlay on a less expensive base that is typically made from materials like stainless steel. The strip electrode will create a smooth overlay surface.
- Adding different chemical elements to the flux. Most welders will incorporate iron powder into the flux. Iron powder is particularly useful as it is able to improve the deposition rates of the welding while not affecting the properties of the welded metal.
There are additional variations that are constantly being incorporated into submerged arc welding for different finishes, results and effects. Most of these techniques are able to help welders save a considerable amount of time and money on the work that they are doing.
Conclusion
Submerged arc welding is definitely a great technique and process to use regardless of what may be welded although it is more suited for thicker materials. By familiarizing with the different technique variations that can be implemented, you can take control of the project and work that you do in order to create better results at a lower cost and with less time. Continue for more information.
