Surface repairing method of air valve for ship engine

• Main Authors: YANG YUKUN, WANG QIUSEN
• Format: Patent
• Language: Chinese; English
• Published: 10.08.2021
• Subjects: 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 provides a surface repairing method of an air valve of a ship engine. The surface repairing method comprises the following steps that 1, first high-speed laser cladding is performed on a to-be-repaired area by using a first cladding material to form a first cladding layer; 2, the powder feeding amount is adjusted, second-time high-speed laser cladding is conducted on the surface at least comprising the bonding area of the edge of the first cladding layer and an air valve base material through a second cladding material, and a second cladding layer is formed; and 3, the powder feeding amount is adjusted, the second cladding material is used for carrying out third-time high-speed laser cladding on an area at least comprising the surface of the first cladding layer and the surface of the second cladding layer, a third cladding layer is formed, surface repairing of the air valve is completed, the first cladding material adopts iron-based alloy powder, and the second cladding material adopts cobalt-b