Vacuum ion nitriding furnace is a high-performance surface treatment equipment suitable for the requirement of no white bright layer or heat treatment of stainless steel materials; Its characteristics are: ① the brittleness of the nitrided layer is small; ② The parts that do not require nitriding can be shielded to achieve local nitriding; ③ Ion bombardment has the effect of purifying the surface, removing the passivation film on the surface of the workpiece, and directly nitriding stainless steel and heat-resistant steel workpieces The thickness and organization of the infiltration layer can be controlled.④Ion nitriding has developed rapidly and has been used in machine tool screws, gears, molds, rollers, bearings, and other workpieces.