Vacuum carburizing method for 15CrA steel bearing ring

• Main Authors: XIA YUNZHI, YU YIHANG, MU QIANG, SUO ZHIPENG, YU ANLE, WU YUCHENG, AN MIN, CHU GUANGQIANG, FU ZHONGYUAN, WANG RUIQING, YU AOHAI, WANG JIAOXIANG, WANG WEIQI, LIU YONGBAO
• Format: Patent
• Language: Chinese; English
• Published: 18.02.2022
• 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; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The invention discloses a vacuum carburizing method for a 15CrA steel bearing ring, and relates to the field of carburizing heat treatment of bearing rings. The technical problems that according to existing atmosphere carburizing treatment, the carburizing efficiency is low, the carburized surface has the oxidation tendency, the surface carbon concentration after heat treatment is insufficient, carburized layer carbides are not uniform, and consequently the wear resistance of the bearing surface is reduced are solved. The method comprises the following steps: carrying out vacuum low-pressure carburizing treatment on the 15CrA steel bearing ring; and quenching and tempering. Through vacuum low-pressure carburization of the 15CrA steel bearing ring, the problem of surface oxidation caused by atmosphere carburization is solved, the surface quality of the carburized ring is improved, the surface carbon concentration of the carburized ring after carburization and heat treatment is improved, carburized layer carbid