This standard specifies the technical requirements and mass inspection specifications for the gas nitrocarburizing process. Gas nitrocarburizing is a surface hardening treatment technology, which is mainly used to improve the abrasion resistance and Hardness of metal workpieces. The standard covers the equipment requirements of the nitrocarburizing furnace, process parameters, types of commonly used infiltration agents, preparation of workpieces before treatment, nitrocarburizing treatment process, chill down method, and operation records. In addition, the mass inspection, equipment maintenance, safety and environmental protection requirements after workpiece treatment are also described in detail. Through this standard, it can be ensured that the mass of nitrocarburizing treatment and the performance of the workpiece meet the relevant technical requirements.