The Advantages of Plasma spraying

       

The working principle of plasma spraying
is: the main gas and secondary gas are input from the gun body behind the spray
gun. The main gas flow between the tungsten electrode and the primary nozzle is
small. The secondary nozzle sprays. The coating processed by plasma spraying
has the following characteristics: the coating of the high melting point
material is uniform, the coating is dense and hard, the porosity is small, and
the ceramic coating of the high melting point material has high bonding
strength.

There are more and more kinds of surface
modification technologies, such as surface coating, ion implantation and ion
extraction.

Plasma spraying is a new type of multi-purpose
precision spraying method that has been vigorously developed after flame
spraying. It has many advantages. For example, first of all, plasma spraying
has ultra-high temperature characteristics, which is convenient for spraying
high melting point materials. Second, the plasma spraying sprays particles at a
high speed, the coating is dense, and the bonding strength is high. Third, due
to the use of inert gas as the working gas, the plasma spraying material is not
easily oxidized.

Plasma spray processing is carried out by
plasma arc. Ion arc is compressed arc. Compared with free arc, its arc column
is thin, current density is high, gas ionization degree is high, so it has the
characteristics of high temperature, concentrated energy and good arc stability.
.