The advantages of plasma welding

The essence of the plasma welding method, as well as its advantages over other types of welding.

Welding is of great importance in all branches of industry and especially important in mechanical engineering. This is due to the fact that its use saves metal. Another advantage is that welded constructions are lighter than castings by 30-40% and rivets by 10-15%. With the help of welding, the production of aircraft, ships, bridges, turbines, reactors and other necessary structures is carried out.

Plasma welding is a process of melting metal by a plasma stream. The essence of the plasma welding method: the arc is formed in the plasma torch, where the gas is heated and ionized using an arc discharge in a special chamber.

The gas blown into the chamber compresses the arc column while the walls of the plasma torch are cooled intensively. Compression reduces the cross section of the arc and increases power. The gas that forms the plasma can also serve as a shield for the metal from the air.

Plasma welding with the MULTIPLAZ-3500 machine

There are many welding methods: electric arc, gas, electroslag, atomic hydrogen, thermite, resistance welding, diffusion, laser, ultrasonic welding, etc.

But one of the most effective ways is plasma welding. Why?

First, plasma welding is highly efficient, especially because in modern metallurgy stainless steels, non-ferrous metals, their alloys, as well as other special alloys, for which other types of welding have low efficiency, are gaining more and more popularity.

Second, the plasma arc has a narrow heat effect zone and minimizes the weld bead. It can also be said about the low deformations of the metal during operation.

Third, plasma welding does not require the use of oxygen, argon, propane-butane and other gases, which ensures quite high efficiency, environmental friendliness and safety.

And the last, plasma flow, in addition to welding and cutting metals, is widely used for layering and spraying. Since the arc has a high temperature (from 5,000 to 30,000 ºС), it can be used to melt refractory metals. Wear-resistant and heat-resistant coatings can be obtained using a plasma surface.