Method for improving fatigue performance of coating alloy

• Main Authors: WU LIXIANG, REN QISEN, LIAO YEHONG, GE HONGEN, XUE JIAXIANG, LI SIGONG, LIU YANG, GONG HENGFENG
• Format: Patent
• Language: Chinese; English
• Published: 08.03.2024
• Subjects: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; 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; FERROUS OR NON-FERROUS ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for improving the fatigue performance of a coating alloy. The method comprises the following steps that S1, pretreatment is conducted, specifically, the alloy with a thin coating is subjected to surface cleaning; s2, cooling treatment: cooling the cleaned alloy by adopting a cooling source, wherein the cooling source comprises at least one of a gas phase, a solid phase and a liquid phase; during treatment, the gas phase and the liquid phase act on the outer surface of the alloy, and the solid phase is arranged in the alloy or acts on the inner side wall of the alloy; and S3, firing pin type ultrasonic shot peening treatment is conducted, specifically, the cooled alloy is subjected to multiple times of firing pin type ultrasonic shot peening treatment. According to the method, the alloy surface coating is subjected to strengthening treatment by adopting a cooling-firing pin type ultrasonic shot blasting process, microdefects such as surface gullies and microcracks existing in t