How does argon arc welding not blacken, and why does argon arc welding blacken when welding stainles

Reduce the current appropriately. Detect argon purity, at least yes. The reverse side should also be protected by argon. Speed up the welding speed, the welding is oxidized when the bottom is not laid, the bottom is not good, and the cover is definitely not beautiful.

TIG welding. It is a welding technique that uses argon as a shielding gas. It is also known as argon gas shielded welding.

It's arc welding.

argon shielding gas is used around the area to isolate the air from the welding area and prevent oxidation in the welding area.

Argon arc welding technology is based on the principle of ordinary arc welding, the use of argon to protect the metal welding consumables, through high current to make the welding consumables melt into a liquid state on the welded substrate to form a molten pool, so that the welded metal and the welding consumables to achieve metallurgical combination of a welding technology, because of the continuous delivery of argon in the high temperature melt welding, so that the welding consumables can not contact with the oxygen in the air, thereby preventing the oxidation of the welding consumables, so that stainless steel, iron hardware metals can be welded.

A type of tungsten inert gas shielded welding (TIG). It is a welding method that uses arc heat to melt the base metal and filler wire to form a joint under the protection of argon. It mainly controls three parameters: welding current, welding speed and argon flow.

Compared with manual welding, the arc and weld pool are visible and easy to operate; Sheet metal structures that can be welded to active metals; Weld seam***, the joint strength can reach 80% 90% of the base metal.

In 1930, inert gas shielded welding was invented in the United States, and in 1957, China began to use tungsten argon arc welding. It can be welded with stainless steel and high-temperature alloys.

Titanium alloy, aluminum alloy and other materials, used in nuclear energy, aerospace.

Shipbuilding, electronics, metallurgy and other industries.

Under the protection of argon, there is no oxidation of the surface. Hope.

When argon arc welding stainless steel will be blackened because the weld is oxidized and causes blackening, it may be that the argon flow rate is too small, or the argon flow rate is too large to form a vortex and be involved in the molten pool air, and it may be that the diameter of the nozzle of the argon arc welding gun is too small, or the arc is too high, the welding wire is far from the workpiece and the base metal Taiyuan weld is invaded by air, or the welding environment is windy.

1. Inject too much heat;

2. Welding too fast;

3. The amount of argon is insufficient;

The blackening of argon arc welding stainless steel is the result of the stainless steel being exposed to air at high temperatures, and it will not occur as long as it is not allowed to detach from argon protection prematurely when cooling.

Because stainless steel also undergoes oxidation behavior, although oxidation is more difficult, this reaction can still be carried out at high temperatures.

The main reasons for the blackening of stainless steel are: 1. The weldments such as plates are not cleaned before welding; 2. Argon protection is insufficient; 3. Long-term welding; 4. The current is too large; 5. Keep the distance between the tungsten pin and the weldment improperly; 6. Improper selection of tungsten needle;

What is the cause of the blackening of the surface of TIG welding.

The root cause of the blackening of the TIG welding seam is poor gas protection or the welding area is not cleaned, mainly the former. Generally, it is solved as follows: 1. Lag gas supply, after the gun is collected, do not leave the muzzle, and blow for a while.

2. Feed gas in advance, before welding, fire in the air first, and then fire when there is gas. 3. Check the purity of the gas, directly change a bottle of argon to try it 4. Check whether there is air leakage, block the porcelain mouth, and build the trigger, (pay attention not to electricity yourself!) After 5 seconds, let go and see if there is any pressure.

5. If the tungsten electrode is not good, it may also lead to buying a big brand. 6. Gas volume, according to the plate thickness to select the current, according to the current to select the tungsten electrode, according to the tungsten electrode to select the porcelain nozzle, according to the porcelain nozzle to select the gas volume.

TIG welding aluminum. Why blackening.

TIG welding aluminum. Why blacken pro, hello! It is mainly caused by oxidation of the weld.

The blackening of stainless steel weld belongs to the most secondary weld and is unqualified weld. Causes: 1. The argon flow rate is too small, and the protective ability becomes weak, resulting in air invading the weld.

It is enough to increase the argon flow rate appropriately. 2. The argon gas flow is too large, and the argon gas flow forms a vortex and is rolled into the molten pool air, which not only causes argon waste and increases the welding cost, but also makes the weld seriously oxidized. It is sufficient to reduce the argon flow rate.

3. The diameter of the nozzle of the argon arc welding gun is too small. Resulting in poor weld protection and oxidation. Replace the large diameter nozzle.

4. The arc is too high, and the welding wire is far from the workpiece and the base metal Taiyuan weld is invaded by air. Appropriately reduce the distance between the welding torch, welding wire and the workpiece. 5. The welding environment is windy.

TIG welding has poor wind resistance. Just do the wind blocking measures and weld. Hope it helps!