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Various industries widely use different welding techniques to join materials by applying heat and pressure, creating a strong and durable bond.
Shielded Metal Arc Welding
Firstly, let’s talk about shielded metal arc welding (SMAW), also known as stick welding. In SMAW, it passes an electric current through a consumable electrode, creating an arc that melts the electrode and the base material. A flux coating on the electrode releases gases to shield the weld pool from atmospheric contaminants. SMAW is versatile and suits welding steel, stainless steel, and cast iron, making it suitable for construction, repair, and maintenance work.
GMAW or MIG Welding
Next up is gas metal arc welding (GMAW), also known as MIG welding, another popular technique. In GMAW, it feeds a continuous wire electrode through a welding gun, along with a shielding gas like argon or a mixture of argon and carbon dioxide. The electric current melts the wire, creating a weld pool that fuses the base materials together. GMAW is known for high productivity, making it suitable for automotive, fabrication, and manufacturing industries.
TIG Welding
Additionally, there’s tungsten inert gas (TIG) welding, also called gas tungsten arc welding (GTAW), commonly used for high-quality welds. TIG welding uses a non-consumable tungsten electrode to create the arc and a separate filler wire to add material to the weld joint if needed. A shielding gas, often argon, protects the weld pool from atmospheric contamination. TIG welding is precise and produces clean welds, making it ideal for aerospace, nuclear, and food processing industries.
FCAW Welding
Moreover, flux-cored arc welding (FCAW) is a versatile technique that combines elements of both SMAW and GMAW. FCAW uses a continuously fed tubular electrode filled with flux to shield the arc and protect the weld pool. This technique can be used with or without shielding gas, depending on the specific application. FCAW is commonly used in construction, shipbuilding, and pipeline industries due to its high deposition rates and ability to weld thick materials.
Submerged Arc Welding
Finally, let’s mention submerged arc welding (SAW). In SAW, an arc forms between a continuously fed bare wire electrode and the workpiece. The weld area is submerged in a granular flux, providing a protective atmosphere and helping control the weld pool. SAW is known for its high deposition rates and is commonly used in fabricating large structures, such as bridges and pressure vessels.
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