Are you interested in Tig welding of aluminum with direct current? The supplier Evek GmbH offers a wide range of welded aluminum at an affordable price. We provide delivery of products anywhere in the continent. The price is optimal.

Peculiarities of welding technology

As you know, under normal conditions, all aluminum products are covered with a surface film of strong and refractory aluminum oxide. Since its melting point is much higher than that of the base metal (2000°C vs. 660°C), during normal welding we would need to increase the arc current several times to ensure its penetration. In addition to the increased energy consumption, this also leads to a higher thermal load on the material of the conventional electrode wire, so that its consumption increases many times over.

Optimizing

The solution to this problem lies in the simultaneous application of two factors:

• The use of an electrode made of refractory metal (in particular, tungsten);
• The use of inert gas - argon, which would effectively protect the combustion zone of the arc from access of air oxygen, which will actively oxidize the metal in the weld formation zone.

TIG method implements both of these possibilities, and therefore is used in both alternating current and direct current. Supplier Evek GmbH offers to buy aluminum of domestic and foreign production at an affordable price in a wide range. We provide delivery of products to any point on the continent. The price is optimal.

Reverse polarity

In the case of alternating current, which polarity is reversed at a rate of 60 Hz, during the welding cycle is both the melting of aluminum in the weld pool, and the prevention of oxidation. As a result, the quality of the weld is improved: there are no sinks and imperfections. Argon in aluminum welding is also used for purging the surface near the weld to remove the slag that builds up

Implementation of the technology

TIG technology, which uses alternating current, is made with tungsten electrodes, but this is not enough for direct current. The following factors are also necessary:

• Intermittent (pulsed) feeding of the filler wire, which takes into account the intensity of the molten bath;
• The use of aluminum alloy wires, but containing surface coatings of high-melting salts of alkali metals;
• Regulation of the energy-power characteristics of the arc discharge - the current and voltage at the arc, which, in turn, determines the length of the arc.

For welding aluminum alloys is optimal to use direct current, provided that the positive electrode is tungsten electrode. In this case, you should use welding machines that support automatic arc stabilization. To reduce the wear of the non-consumable electrode is recommended to use inverter welding units.

Buy. Supplier, price.

Are you interested in Tig welding of aluminum with direct current? The supplier Evek GmbH offers to buy TIG-welded aluminum at the producer price. We provide delivery of products anywhere in the continent. The price is optimal. We invite to partner cooperation.