A device and method for preparing particle-reinforced metal matrix surface composites

Abstract

The invention discloses a device and a method for preparing a particle-reinforced metal matrix surface composite material and belongs to the technical field of preparation of abrasion-resistant materials. The device comprises a cavity of a boss, an inner quartz tube, an EPS (Expandable Polystyrene) foam, a precast layer, a metal net, silica sand, a metal net, a rubber plug, a right-angle quartz tube, a sand mold, an outer quartz tube, a vacuum gauge, a vacuum valve and a vacuum pump. By virtue of a vacuum sealing technology, the cavity filling capability of molten metal is improved, so as to facilitate infiltration of the molten metal among the reinforced particles, so that a thicker and more compact composite layer is obtained and the prepared particle-reinforced metal matrix surface composite material has the advantages of relatively high reinforcement volume fraction, relatively uniform reinforcement distribution and excellent impact and abrasion resistance. The method has the characteristics that the cavity filling capability of the molten metal is high and the surface composition thickness of the particle-reinforced metal matrix surface composite material is large. The method is not only applicable to preparing a common particle-reinforced metal matrix surface composite material, but also applicable to preparing a mechanical testing material with relatively high requirement on the composite material.

Description

technical field [0001] The invention relates to a device and method for preparing particle-reinforced metal-based surface composite materials, and belongs to the technical field of preparation of wear-resistant materials. Background technique [0002] The development of modern industry has higher and higher requirements on the wear resistance of materials. Metallurgy, mining, building materials, electric power, chemical industry, coal and agriculture departments need to use mining machinery, engineering machinery, agricultural machinery, and various crushing and grinding materials respectively. Machinery, the wearing parts of these mechanical equipment are worn by various materials such as sand, soil, and grinding bodies, and a large amount of metal is consumed every year. According to incomplete statistics, 1 / 3~2 / 3 of the energy is consumed by friction and wear; for materials, about 80% of parts failure is caused by wear, of which about 50% are caused by abrasive materials,...

AI Technical Summary

Problems solved by technology

Among these processes, the first four processes have poor casting surface quality, low dimensional accuracy, prone to defects such as pores or inclusions, and the thickness of their respective surface composite layers is relatively thin. Compared with the first four processes, the pores and inclusions are reduced, the dimensional accuracy is improved, and the surface quality is also improved to a certain extent. However, the thickness of the composite layer is only 3~5mm thick at present. If the mechanical properties of the composite layer are to be tested, various mechanical properties cannot be satisfied. Based on this, the device and method of vacuum full-type casting tungsten carbide reinforced metal surface composite material have solved the problem of thin composite layer thickness. The particle reinforced surface composite material prepared by this device method is The thickness of the material reaches 17mm, which meets the current requirements for the size of the composite layer material in various mechanical tests. This method is of great significance for the study of material performance testing.

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