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|Metal welding|

The oldest type of welding (not made by forge) is gas welding, known as autogenic torch welding, which was developed from 1903. This welding method uses the heat of a flame obtained by the combination of a gas with oxygen. Many kind of welding can be achieved in relation depending on the utilized gas, for example oxy-acetylene welding, blowtorch welding and oxyfuel welding. The most common is oxy-acetylene welding. Coated electrode arc welding is a more versatile method and takes advantage of the heat generated from an arc that strikes between a consumable electrode and the work-piece. This process allows to weld joints in every position and to weld very small areas.

Arc Welding in protected atmosphere
The welding of certain kind of light metals and of stainless steel requires a protection of the welding cord from oxidation during its formation and cooling. This protection is activated striking the arc inside a protective atmosphere, neutral or inert, with the use of high density gas which covers the whole area under the welding, isolating it from air. There are 3 different processes of arc welding in protected atmosphere. TIG welding, Mig welding and MAG welding; the first two use as gas argon, helium or a mix of both, while the third uses pure or mixed carbon dioxide.

TIG welding
T.I.G. stands for Tungsten Inert Gas and indicates the electric arc welding with tungsten electrode inside still atmosphere (obtained with the use of inert gas such as argon, helium or a mix of both). TIG welding is used for many kind of metals like stainless steel, aluminium, copper, brass, pig iron, titanium, nickel and many more. Depending on the kind of application, it is possible to choose between manual, semiautomatic or automatic installations. Tungsten electrode is very resistant to the consume and doesn't take part at the process of welding. The deposit metal is supplied under the form of a stick. TIG welding is one of the main welding methods of Baruzzi Saldature and enables the realization of welded joints with a perfectly homogeneous and smooth welding cord, thanks to the high protection from oxidation caused by atmosphere and by heat.

Braze welding
Baruzzi Saldature utilizes this process manually and automatic and the edges of the base metal are put together using a metal or an alloy which has a lower melting degree than the base metal one. This enables to make a welded joint where the borders of the base metal don't reach the melting state. The temperature involved are between 600 and 800 (deposit metal melting temperature). Elastic and resistant welding are realized with braze welding; its use is very popular because it allows to join almost all kind of metals and to decrease the gas and fuel consume. Braze welding is fundamental in heterogeneous junctions; these are junctions of different metals which can't be manufactured with the traditional welding processes because they have a different melting point between them.

Baruzzi Saldature performs manual Brazing for hydraulic, thermohydraulics and automotive sectors. Brazing, or capillary brazing, is processed as braze welding, with the use of a filler material that has a lower melting temperature than the base material. The difference is the placement of the borders of the base material which are placed in order to leave a capillary space between them. Base materials are then heated and taken to a temperature which doesn't make them reach the melting point, but allows the filler material to melt and leak along the base metal boards, wetting and joining them completely.

Induction welding
Induction welding is widely used by Baruzzi Saldature; it is a welding system through which the welded joint is manufactured by taking the work-piece to the welding temperature by using the principle of electromagnetic induction. The electromagnetic induction welding system is composed by an induction reel that generates an high frequency electromagnetic field (High Frequency Induction Welding). The electromagnetic field brings in the materials a heating effect that allows to melt the filler material producing the welding joint.

Braze welding on brass - brass TIG welding on stainless steel - stainless steel Braze welding on copper - brass Spot-welding on stainless steel Braze welding on brass - brass TIG welding on stainless steel household articles Braze welding on copper pipes

From the top:

Braze welding on brass/brass.

TIG welding on stainless steel/stainless steel.

Braze welding on copper/brass.

Spot-welding on stainless steel.

Braze welding on brass/brass.

TIG welding on stainless steel household articles.

Braze welding on copper pipes.