PN+PVD Technology

For most medium carbon alloy structural steel parts, its hardness is much lower than that of hard film. Only a few microns thick PVD film is deposited, which is difficult to effectively improve its wear resistance, fatigue strength and plastic deformation resistance. After nitriding, nitrogen compound and diffusion layer are formed on the surface of steel, which improves the surface hardness of parts. Nitriding parts are more suitable for PVD coating than non nitriding parts.