The invention discloses a novel
nitriding process. The novel
nitriding process comprises the following steps that a cleaned part is placed in a
nitride furnace and subjected to preoxidation for 1-2 hours at the temperature of 350-400 DEG C, then
ammonia gas and an energizing
reagent are injected, exhausting is carried out, the temperature is increased to 520-650 DEG C, then the
ammonia gas and the energizing
reagent continue to be injected, insulating
nitriding is carried out for 12-18 hours at the temperature of 520-650 DEG C, and then the part is cooled to be at the
room temperature, specifically, the flow of the injected
ammonia gas is 1.4-2.0 m<3> / h, the flow of the injected energizing
reagent is 2-4 ml / min, and during insulating nitriding, the pressure of the
nitride furnace is 0.4-1.0 kPa, and the
ammonia gas resolution ratio is 20%-70%. The nitriding process is simple, the effective hardening layer depth of the obtained part is higher, and the micro-structure of a permeating layer is better; and according to the product subjected to nitriding treatment, deformation is tiny, the dimension precision and the
mechanical strength index meet the
product design requirements, and perfect combination of the surface
hardness, effective hardening layer depth and deformation with the process cycle is achieved.