Anti-corrosion tufftriding process method for ammonia-nitrogen-carbon dioxide atmosphere

• Main Authors: CHEN GUOHUI, LIANG CHUPENG, DENG JIANQIANG, YU RONGJIE, JIAO GUOXIANG
• Format: Patent
• Language: Chinese; English
• Published: 21.02.2020
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The invention discloses an anti-corrosion tufftriding process method for ammonia-nitrogen-carbon dioxide atmosphere, and relates to the technical field of metal material heat treatment. The anti-corrosion tufftriding process method comprises the following steps: performing pre-heating treatment on a component in a furnace; after pre-heating treatment is completed, filing a gas with 45 to 55 percent of ammonia gas, 40 to 50 percent of nitrogen and 4.5 to 5.5 percent of carbon dioxide to perform tufftriding treatment, and performing cooling treatment after the tufftriding treatment is completed;and stopping filling the carbon dioxide, ammonia gas and nitrogen in sequence in the cooling treatment process. According to the anti-corrosion tufftriding process method, a protective layer can be formed on the surface of the component by filling the ammonia gas, nitrogen and carbon dioxide to perform the tufftriding treatment after the pre-heating treatment is completed, so that the hardness and the anti-corrosive prop