How to argon? Process description and instruction

Welding with argon is able to protect surfaces frommetal from the penetration of oxygen and harmful impurities. It provides a qualitative weld, and also retains all the physical characteristics of the metal. At the same time, the consumption of argon is much lower than when using other welding equipment.

Argon belongs to the category of inert gases, so in the medium, its connection with external gases and alloys does not take place.

Many are wondering how to brew argon aluminum or stainless steel. The technique will be described in this article.

How is aluminum cooked?

How to argon aluminum? It should be noted that when working with this metal without this type of welding can not do, since it ignites from oxygen. This method provides a high quality seam. The arc is formed by using a tungsten-based electrode. Such an electrode can last a long time. Between the electrode of tungsten and the part intended for welding, an arc is ignited. An aluminum wire is fed into the combustion zone. Welding is performed in a narrow area with a rapid movement of the electrode. This allows the aluminum to not melt. In order for the welding seam to be of high quality, the wire must be exactly the same structure as the weld metal.

What do you need for welding work with argon?

Argon apparatus for aluminum welding includes the following components:

• power supply source;
• a balloon with argon;
• device for feeding the filler wire.

Preparation of aluminum surface

Is it possible to boil the unrefined surface with argon? With aluminum, you must remove dirt, grease and engine oil. This can be done with the help of a solvent. If the thickness of the welded parts is more than 4 mm, then it is necessary to separate the edges.

Experts advise cooking aluminum in sheets 4 mm thick only butt.

Before you start welding aluminum,The master should ask what the thickness of the sheet and the width of the edges. Edge protection is carried out by a file or an abrasive machine. If the part has a complicated shape, then the welding place should be cleaned using a grinding machine. From the surface of aluminum, the oxide film is removed.

Features of welding aluminum with argon

How to boil aluminum with argon? To qualitatively perform the welding of metal by this method, one should resort to the use of tungsten electrodes. Their diameter should be 1.5-5.5 mm. The electrode is held at an angle of 80 degrees. The filler wire is at right angles. The maximum arc length should be 3 mm.

If these rules are followed, the consumption of materialswill be economical. During operation, the filler wire must move in front of the burner. Electrode and filler wire for welding aluminum should move along the welded seam. Crosswise movements can not be done.

When welding thin aluminum sheets in a rolethe lining can be made of stainless steel. This will ensure increased heat dissipation from the work area, and the risk of burnout will be significantly less. The energy consumption will also decrease, since the work will be done more quickly.

Pros and cons of welding argon aluminum

Welding of aluminum products in the argon environment has a number of advantages over other methods. The welded seam has the same depth of penetration over the entire length.

To the minuses of this type of welding can be attributedcomplexity of equipment. When welding with argon, you need to fine tune all the elements of the device. The wire should be fed into the work area gradually. For this purpose, the feeder is adjusted correctly. If the wire feed is irregular, the burning of the arc will be intermittent. This will cause increased consumption of argon and electrical energy. For a high-quality welding of aluminum, the master must have the proper experience. Theoretical knowledge and advice will not be useful in this matter.

Preparation for welding with argon stainless steel

As argon to brew aluminum, it is understandable. What are the rules to be observed when working with stainless steel? For welding this type of metal you will need:

• apparatus for welding;
• electrodes, selected in accordance with the characteristics of the material;
• stainless steel wire;
• brush made of steel;
• solvent.

Before welding parts are processed their edges. An important principle must be observed: to ensure free shrinkage of the seam when creating a welded joint, a small gap is made.

Before work, the edge surface is cleaned. For this purpose, a steel brush is used. Also, the edges are washed with a solvent. You can use acetone or aviation gasoline. This treatment will remove from the surface of stainless steel fat, which can cause a decrease in arc stability during welding. This will cause the appearance of pores on the seam.

Argon welding using a melting electrode

How to properly boil argon, applying meltingelectrodes? Stainless steel welding with the use of coated electrodes makes it possible to obtain seams of high strength. If you do not have high requirements for the quality of the connection, then it is necessary to apply welding with argon.

In the range there is a fairly wide rangeelectrodes. Each of them is designed for a certain type of stainless steel. If the master knows the type of steel to be welded, it will be easy to find the right kind. Electrodes should be chosen which will not reduce the corrosion resistance of the material and its mechanical properties.

As a rule, work is carried out usinginverse constant level. It is necessary to work so that the penetration of the seam occurs to a lesser extent. For this purpose, small diameter electrodes are used. We should strive to ensure that the thermal energy is released in a small amount. Professionals in the field of welding note that when working with stainless steel it is necessary to use electric power 20% weaker than when welding ordinary steel.

Electrodes have a low valuethermal conductivity and high electrical resistance. For this reason, the use of high currents is unacceptable. If this rule is violated, the electrodes will be subject to overheating and destruction. For this reason, electrodes for stainless steel are subject to faster melting than those by which conventional steels are welded.

To maintain the stability of the seam to rust,make its cooling quick. For example, this can be achieved by laying out copper or air. If the stainless steel belongs to the category of chromium-nickel metals, it can be cooled with water.

How to cook a stainless steel tungsten electrode?

How to cook stainless steel with argon, applyingtungsten electrodes? It should be noted that such a method is applicable in the case when it is required to weld an object from the finest stainless steel and to obtain high-quality welds. For example, argon welding with tungsten electrodes is suitable for stainless steel pipes, through which gases or liquids are transported under pressure.

How correctly to cook argon stainless steel? The work is carried out with the supply of alternating or direct current. Variable type suitable for aluminum welding.

Before you get started, you need toprepare the filler wire for work. Well, if it will have a higher level of doping than stainless steel or aluminum. When working with a tungsten electrode, you can not make oscillatory movements. They are the cause of violation of the protective space of the welding zone, the weld metal will be subject to oxidation. The reverse side of the welding seam is protected from air by blowing argon.

Tungsten should not enter the welding bath. You can use non-contact arc arson. It can also be ignited on a plate of coal or graphite, followed by transfer to the base metal.

At the end of the process, you should not turn offsupply of argon immediately. It should be done in about 15 seconds. Thus, it is possible to avoid excessive oxidation of the hot working electrode. So he can last longer.

How to weld a stainless steel semi-automatic in an argon medium?

As argon to cook stainless steel, applyingsemi-automatic. This method of welding has become widespread, as it provides a high level of productivity and makes it possible to obtain strong seams. To improve the quality of welding, nickel is added to the wire.

This type of welding is suitable for joiningmaterials of great thickness. In this case, welding will proceed very quickly. Thus, the level of productivity increases. The protective medium in this case is a mixture of carbon dioxide and argon.

A number of techniques are used that allow welding a stainless steel semiautomatic machine:

• welding by means of a short arc;
• welding by jet transfer;
• impulse mode application.

Jet transfer is used to weld metals of large thickness, and a short arc connects thinner objects.

The plus of the impulse method is that thisthe process is most controlled. The metal wire is fed into the impulse welding bath. Each of them is a separate welding drop. This mode helps to reduce the average value of the arc current, which is important for welding stainless steel. In the pulsed mode, the metal is practically not sprayed. This makes it possible to spend materials sparingly and increase the level of productivity by reducing the time it takes to strip the seam.

The article described how to brew argon aluminum and stainless steel.

This type of welding is best suited foraluminum surface. There are also a number of different techniques for welding stainless steel by means of argon. Each master must choose the appropriate option for the particular case.