High-wear-resistance Ni60-based composite gradient coating and preparation method thereof

• Main Authors: TAO WANGWANG, LIAN XINLONG, ZHANG SHUHAO, ZHUANG DONGDONG
• Format: Patent
• Language: Chinese; English
• Published: 18.11.2022
• Subjects: CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; 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; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; DIFFUSION TREATMENT OF METALLIC MATERIAL; FERROUS OR NON-FERROUS ALLOYS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM

The invention provides a high-wear-resistance Ni60-based composite gradient coating and a preparation method, and belongs to the technical field of alloy coatings. According to the method, the Ni60 coating is prepared through the laser cladding technology, #-shaped micro-nano machining is completed on the surface of the coating through laser etching, the etched structure is strengthened through laser shock, and the Ni60 + TiC composite coating with the same matrix component is cladded, so that the different coatings can be tightly combined in a mutual embedding mode, and the surface of the Ni60 + TiC composite coating is tightly bonded. And falling is not prone to occurring. In addition, the thermal expansion coefficients of different coatings are basically consistent, and cracks in the coatings can be effectively reduced. And then the Ni60 + TiC + La2O3 coating is prepared on the surface of the Ni60 + TiC coating in the same mode. And finally, performing surface strengthening on a finished product coating in