As you are already aware, welding is the process by which two metal pieces can be fused together. The process of welding does not just bond the two metal pieces together as in the case of soldering or brazing, but due to the use of intense heat and addition of gases and other metals, the metallic structures completely join together to form a single piece.
There are many types of welding methods that are usually employed. Here, we will be discussing some of the welding processes in detail.
This method of welding is also known as oxy welding or oxyacetylene welding and this makes use of oxygen and fuel gases to cut and weld metals. This method of welding is commonly used for brazing metals like bronze and copper and it can also be used to weld aluminium pipes such as delicate refrigeration pipes.
Shielded Metal Arc Welding (SMAW)
This welding process is also known as electric welding or stick welding. The SMAW method utilises an electrode, which has flux or a chemical agent around it to shield the weld puddle. The electrode is held by the holder till it melts away. The weld puddle is protected by the slag from contamination from the atmosphere.
Gas Metal Arc Welding (GMAW)
This is known as MIG (Metal Inert Gas) commonly. In this welding method, the shielding gas (a mix of carbon dioxide and argon) along with the wire electrode is fed via the welding gun that protects the weld puddle from contaminants present in the atmosphere.
Gas Tungsten Arc Welding (GTAW)
Also, known as TIG or Tungsten Inert Gas, this process of welding makes use of a tungsten electrode in order to produce a weld. Inert gases such as helium or argon are used as shielding gases to protect the weld area from contamination.
Submerged Arc Welding (SAW)
This process essentially makes use of a consumable electrode that is automatically fed and granular flux that can be fused. The arc zone, as well as the molten weld, is protected from being contaminated by being immersed under the blanket of flux.
Flux-Core Arc Welding (FCAW)
This is very similar to the MIG welding process, except that in this case, it makes use of a tubular wire that is filled with flux and can be used with or without using a shielding gas.
Electroslag Welding (ESW)
This welding process is highly productive and is used mainly in the case of thicker materials (between 1-12 inches).
Electrical Resistance Welding (ERW)
This kind of welding denotes a group of processes like seam and spot welding that join fraying surfaces and the heat for welding is generated by the electrical resistance offered by the material. This method is usually used to weld thin materials.
Several energy sources can be used for the purpose of welding such as – electric arc, gas flame, electronic beam, laser, ultrasound, friction and welding, and can be carried out in several environments be it indoors, outdoors, underwater and even in outer space.
Until the late 19th century, the only welding process employed was forge welding, a process used by blacksmiths. However, things have changed in the last few decades and the welding process too has undergone a complete change. Today, with the advancement in science and technology, we can see methods like robotic welding and newer welding methods are being developed every day to better the weld quality and efficiency of the process.
Escco can provide a range of welding consumables and supplies. To find out more, please get in touch with us on 01432 809 809.