▎ 摘　　要

NOVELTY - The preparation method of graphene reinforced copper-based composite coating involves ultrasonically dispersing graphene oxide powder in deionized water to prepare graphene oxide colloid solution, dripping nickel nitrate solution and dilute aqueous ammonia, filtering, washing and drying the obtained product, and heat-preserving to prepare nickel/graphene nanocomposite material, mixing with copper metal powder, ball milling to obtain mixed material, performing cold spraying process, spraying copper metal powder on surface of workpiece to obtain copper transition layer. USE - Preparation method of graphene reinforced copper-based composite coating for wear-resisting component (claimed). ADVANTAGE - The method enables preparation of graphene reinforced copper-based composite coating with high efficiency and excellent friction and wear resistance, by simple process. DETAILED DESCRIPTION - The preparation method of graphene reinforced copper-based composite coating involves (S1) weighing graphene oxide powder, and ultrasonically dispersing in deionized water to prepare graphene oxide colloid solution, dripping nickel nitrate solution and dilute aqueous ammonia under stirring condition, continuously stirring, filtering, washing and drying the obtained product under protection of inert atmosphere, and heat-preserving at 500-600 degrees C to prepare nickel/graphene nanocomposite material, (S2) mixing copper metal powder with nickel/graphene nanocomposite material prepared in step (S1), and ball milling at 150-200 rpm to obtain mixed material, (S3) performing supersonic low pressure cold spraying process, using compressed air as working gas, where the spraying pressure is 0.5-0.7 MPa, the temperature of spray gun is 200-400 degrees C, the moving speed of spray gun is 30-40 mm/second, the distance between spray gun and the workpiece is 20-25 mm, and the amount of powder is 0.1-0.3 g/second, and spraying copper metal powder on a surface of the workpiece to obtain copper transition layer, and (S4) performing supersonic low pressure cold spraying process, using compressed air as working gas, where the spraying pressure is 0.6-0.8 MPa, the temperature of the spray gun is 200-400 degrees C, the moving speed of spray gun is 20-30 mm/second, the distance between spray gun and the workpiece is 20-25 mm, and the amount of powder is 0.2-0.3 g/second, and spraying the mixed material obtained in step (S2) on the surface of the copper transition layer obtained in step (S3). An INDEPENDENT CLAIM is included for use of graphene reinforced copper-based composite coating in wear-resisting component.