A composite metal coating

Abstract

The invention discloses a novel composite metal coating. The novel composite metal coating comprises a substrate and a coating; the preparation process of the novel composite metal coating comprises the following steps: 1) mixing the following raw materials of the novel composite metal coating in percentage by weight: 15-20% of nickel, 65-70% of copper, 3-5% of carbon, 4-8% of silicon and 2-8% of yttrium oxide; grinding the raw materials together to obtain a paint; 2) treating the surface of the substrate; 3) flow painting, namely pouring the paint on the substrate and enabling the paint to flow evenly on the surface of the substrate to obtain the coating even in thickness; and4) firing the coating. In this way, the novel composite metal coating has the strength and tenacity of metals and the advantages such as high temperature resistance, high temperature oxidization resistance, wear resistance and corrosion resistance of ceramic materials.

Description

technical field [0001] The invention relates to the field of metal coatings, in particular to a composite metal coating. Background technique [0002] Coating refers to a thin layer of material that adheres to a certain base material to play a special role and has a certain bonding strength with the base material. It can overcome certain defects of the matrix material and improve its surface properties, such as optical properties, electrical properties, erosion and corrosion resistance, wear resistance and mechanical strength, etc. It belongs to a thin film with a support. [0003] Most ceramic materials have the characteristics of high melting point, high hardness, high stiffness, high chemical stability, good insulation, small thermal expansion coefficient, small friction coefficient and no ductility, but due to the brittleness of ceramics, plastic deformation ability, thermal shock resistance And poor fatigue resistance, sensitive to stress concentration and cracks, so t...

AI Technical Summary

Problems solved by technology

[0003] Most ceramic materials have the characteristics of high melting point, high hardness, high stiffness, high chemical stability, good insulation, small thermal expansion coefficient, small friction coefficient and no ductility, but due to the brittleness of ceramics, plastic deformation ability, thermal shock resistance And poor fatigue resistance, sensitive to stress concentration and cracks, so that the use of ceramics as mechanical structural materials has been greatly limited

As the requirements for material properties become more and more stringent, it is difficult for monolithic metal materials to meet the requirements of some special working conditions