Ion nitriding is a kind of ion chemical heat treatment process to strengthen the metal surface by using the phenomenon of glow discharge. The nitrogen ions generated after the ionization of nitrogen-containing gas bombard the surface of the part and heat it up and carry out nitridation to obtain the surface nitriding layer. It is widely used in cast iron. , carbon steel, alloy steel, stainless steel and titanium alloy, etc. After the parts are treated by ion nitriding, the hardness of the material surface can be significantly improved, so that it has high wear resistance, fatigue strength, corrosion resistance and burn resistance.

Ion nitriding, also known as glow nitriding, is carried out using the principle of glow discharge. Glow discharge is when the gas passes through the corona discharge area, if the resistance of the external circuit is reduced, or the voltage of the whole circuit is increased, and the discharge power is continued to increase, the discharge current will continue to rise. At the same time, the glow gradually expands to the entire discharge space between the two electrodes, and the light becomes brighter and brighter. When the electron energy f is increased, that is, the operating parameters of the electric field are enhanced, the corona discharge can be transitioned to the glow discharge.

The nitrogen atoms infiltrated into the surface of the workpiece by ion nitriding are not generated by the decomposition of ammonia gas like ordinary gases, but the ions formed by the collision of particles accelerated by the electric field with nitrogen-containing gas molecules and atoms are adsorbed and enriched on the surface of the workpiece. The formation of highly reactive nitrogen atoms.