Composite material coated with SiC-Fe based alloy layer and preparation method of composite material

Abstract

The invention discloses a composite material coated with a SiC-Fe based alloy layer and a preparation method of the composite material. The composite material coated with the SiC-Fe based alloy layer is formed by coating the SiC-Fe based alloy layer on the surface of a steel base material, wherein the steel base material is carbon steel or alloy steel of which the carbon content is 0.2 to 0.7 weight percent, and the raw material of a SiC-Fe composite material layer is SiC powder and iron-based autolytic alloy powder. The preparation method of the composite material comprises the following steps of: mixing the iron-based autolytic alloy powder with the SiC powder; and spraying the mixture on the surface of the steel base material. The composite material coated with the SiC-Fe based alloy layer has excellent performances of high hardness, good wearing resistance, low brittleness, capability of being subjected to heat treatment and machining, low cost, high performance price ratio and the like, and can obviously improve the surface property of the steel base material.

Description

1. Technical field [0001] The invention relates to a composite material and a preparation method thereof, specifically a composite material covered with a SiC-Fe base alloy layer and a preparation method thereof. 2. Background technology [0002] Particle-reinforced metal matrix composites not only have the characteristics of good metal plasticity, but also have the advantages of high hardness and good wear resistance of ceramic particles, thus showing the incomparable excellent performance of single metal or ceramic particles. By surface engineering techniques, such as thermal spraying, plasma surfacing, laser cladding, etc., a layer of particle-reinforced metal-based composite coating with high wear resistance requirements can be prepared on the surface of the workpiece, which can significantly improve its performance and prolong its service life. There are also methods of surface coating alloys or composite materials at home and abroad, but the coated composite materials ...

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Problems solved by technology

[0003] In addition to the disadvantages of high cost, the above cladding composite materials also have some other disadvantages, such as WC in the WC-steel composite material is easily dissolved in the matrix, increasing the carbon content of the matrix and forming fishbone carbides and The bridging phase significantly increases the brittleness of the cladding layer and decreases its performance; the wettability of TiC and the steel substrate is poor, the interface bonding is weak and easy to segregate, and it is easy to fall off during use; there are few bonding phases in cemented carbide, and the composite The material coating is very brittle, and it uses Co as the bonding phase. Compared with the steel substrate, it cannot be heat-treated, and its coating properties cannot be adjusted through heat treatment to achieve a better match with the base material.

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