Purposes: 
 Ion nitriding is a chemical metal surface hardening heat treatment method. It is the metal parts in the active medium in a certain temperature and holding time, nitrogen penetrate the metal surface, thereby changing the chemical composition of the metal surface, so that it has high hardness, wear resistance, fatigue strength, anti- corrosion and anti-burns, etc., has been widely applied in industry. 
 The adaptability of ion nitriding of materials, nitride steel, carbon steel, alloy steel, stainless steel, the milling of cast iron, high-speed steel cutting tools and non-ferrous metals can ion nitriding. Widely used in machine tools, light machinery, textile machinery, petroleum machinery, power machinery and other industries requiring high hardness, fatigue resistance, corrosion resistance, high precision parts, such as: gears, crankshafts, cylinder liners, mold, screw, spindle tool such as ion nitriding process. 
 Plasma nitriding has the infiltration speed, the performance of the nitrided layer, the deformation of the workpiece is small and low energy consumption, pollution, etc., is an ideal surface treatment process.