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Technical Characteristics

For welding operations with the metals in question, welding in an inert gas - argon, with the use of non-consumable tungsten electrodes is most often used. The apparatus for welding includes a torch with a tungsten electrode. Through this device, a stream of gas is fed into the welding area with a high flow rate, which protects the area where the welding operation is carried out from the harmful effects of gases. In particular, oxygen and nitrogen in the air contribute to intensive oxidation of molten metals. Nitrogen at the same time promotes the formation of nitrides - compounds that increase the unevenness of the structure in the weld zone.

Advantages of the technology

• Protection of the weld pool, which eliminates the interaction of metals with air;
• No effect of the thickness of the parts on the quality of the weld;
• Reduces splashing of metal in the weld pool, so that the finished joint has a uniform strength;
• No need to equip a specially protected from molten metal splashes welding station.

Because argon is heavier than air, its constant presence in the welding zone ensures good weld root penetration. The supplier Evek GmbH offers to buy aluminum of domestic and foreign production at an affordable price in a wide range. Provide product delivery anywhere in the continent. The price is optimal.

Sequence of welding

For high-quality welding of aluminum with stainless steel, it is necessary to perform a number of preparatory works:

• Choose a filler wire, the composition of which should correspond to the brands of the materials to be joined;
• Provide the welder with calibrated steel rods of the same brand of stainless steel and a diameter of 2 ... 3 mm;
• Prepare edges of welded workpieces or parts: clean them from traces of dirt, scale, grease, etc.

The welding of stainless steel as aluminum in the presence of argon is performed with DC reverse polarity welding current. The power of the arc is set depending on the thickness of the joined products. Before starting the work, a technological gap between the parts should be no less than 1.5...2 mm. The best welding quality is obtained with beveling of adjacent edges: under these conditions it is easier to form a bath of melt, and the weld can be welded from both sides of the joint. Feeding solder is carried out exactly in the molten bath.

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