Welding is one of the most widespread and demanded production processes in modern construction, mechanical engineering, the manufacture of metal structures and other industrial areas.
Arc welding takes its well-deserved place among these works. Due to the high strength of the welded joint, the cost of working time and the "aesthetics" of the welded seam (often, the seam is very thin and invisible), arc welding easily finds its consumers. The arc welding process uses a variety of gases. So in argon welding, aragon gas is used, which is filled into cylinders.
Instead of argon, in such welding works, another inert gas in cylinders is often used - helium. Its use is justified for welding extremely thin surfaces such as aluminum foil. In addition to helium, filling cylinders with carbon dioxide , nitrogen, hydrogen and a mixture of the listed gases, which are used for welding, is also carried out. The functions of an electric arc are taken over by a tungsten or carbon electrode.
Depending on the type of work, arc welding can be used with a constant, variable or pulsed source of electric current.
Argon is 38% heavier than air. This property allows it to displace air from the welding zone and reliably isolate the welding site from contact with the environment. In addition, being an inert gas, argon does not come into contact with the welded metal surfaces, which allows you to preserve the chemical composition of the product, and therefore its properties. The surfaces of the metals subjected to this treatment can be made of aluminum, magnesium, copper, molybdenum, tungsten and other rare earth or non-ferrous metals. Also, argon welding is used for soldering precious metal products.
