Structure of melted-plated compound coating by vacuum fusion covering+chemical plating and preparation method thereof

Abstract

The invention relates to a structure of a melted-plated compound coating by vacuum fusion covering+chemical plating and a preparation method thereof. The structure of the coating is divided into a vacuum fusion covering nickel-based tungsten carbide compound layer, a transitional layer, a diffusion influence area and a chemical plated Ni-P-GO compound coating on the surface of a compound claddinglayer. The nickel-based tungsten carbide compound material coating is metallurgically bonded to a matrix, and WC hard particles are distributed among spherical nickel-based alloy particles to form a three-dimensional netty structure; a chemical compound coating is formed based on the compound cladding layer to obtain a comprehensive functional melted-plated compound coating. The method comprises the following steps: first, uniformly mixing nickel-based alloy powder with a self-made adhesive, coating the mixture to the surface of a carbon steel matrix to form the transitional layer, and coatingthe compound powder mixed with the adhesive to the surface of the transitional layer to obtain the compound cladding layer; and then preparing a nickel and phosphorus graphene oxide compound coatingby means of a chemical plating technology, and carrying out thermal treatment on the obtained melted-plated compound layer at 400-600 DEG C, wherein the chemical coating and the cladding layer are indiffused connection.

Description

technical field [0001] The invention relates to surface modification technology, in particular to the technology of combining vacuum cladding and electroless plating to prepare a metal-based corrosion-resistant, wear-resistant and high-temperature resistant fusion-plating composite coating. Background technique [0002] The development of industrial modernization has higher and higher requirements on the surface properties of equipment parts, especially under the conditions of high speed, high temperature, heavy load, and corrosive media, the damage of materials often starts from the surface. Surface engineering is developed to solve problems such as corrosion, wear, oxidation, and fatigue. After surface pretreatment, surface modification technologies such as surface coating, spraying, and plating can be used to change the appearance of solid metal surfaces or non-metallic surfaces. Morphology, chemical composition, organizational structure and stress state to obtain the sys...

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Problems solved by technology

However, graphene oxide currently has problems such as complex preparation, agglomeration problems, and low bonding strength between the coating and the substrate; Problems such as low strength need further measures or corresponding technologies to improve or solve these problems

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