Method for preparing ceramic particle reinforcement of composite wear-resistant material

Abstract

The invention relates to a method for preparing ceramic particle reinforcement of a composite wear-resistant material. The ceramic particle reinforcement is prepared by sintering WC ceramic particles in a vacuum high-temperature environment. By designing molds in different shapes and dimensions, a preformed body can be made into various required shapes, such as a block and a honeycomb, and the like. The preformed bodies are regularly arranged on an end face of a casting mold. After metals are cast by a negative pressure casting method, the liquid metal permeates the ceramic particle reinforcement (pores) of the preformed bodies to form the composite material under the action of casting infiltration; and a base metal on a working surface of a casting piece and the formed composite material coexist. Therefore, the ceramic particle reinforcement improves the wear resistance of a wear-resistant piece, and has certain impact resistance.

Description

technical field [0001] The invention relates to a preparation method of a particle reinforcement of a composite wear-resistant part, in particular to a preparation method of a ceramic particle reinforcement of a composite wear-resistant material. Background technique [0002] Wearable parts used in grinding equipment and crushing equipment encountered in cement, mines, thermal power plants and various industries. These parts are usually required to have good overall mechanical properties. It is hoped that these parts not only have high wear resistance, but also have certain toughness, so as to have mechanical properties such as impact resistance, so as to meet the requirements of actual working conditions. [0003] The wear resistance of a material is usually proportional to the hardness, and high toughness and high hardness are a pair of contradictions in the same material. Composite materials are a good way to solve this contradiction. Some people put forward the concept ...

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Problems solved by technology

The Chinese invention patent (CN 1147373C) makes the particle reinforced composite material into partial reinforcement, which can avoid the brittleness of the whole composite reinforcement, but the scope of application is limited, but it can only be used for the product of the guide plate for rolling steel, and has not been made from ceramic particles. The preparation of the reinforcement is changed; the Chinese invention patent (CN 101412095A) uses a low-carbon steel sheet to wrap the alloy powder and particles to control the distribution of the composite material, but the thin steel sheet loses its support strength after reaching the mechanical melting point at high temperature. And it cannot be melted at high temperature, and remains in the casting to become the weak link of the composite material. In addition, the operation process is very complicated

The Chinese invention patent (CN101585081A) uses a binder and a special mold to prepare a ceramic particle reinforcement, and then casts it. The operation is simple and can be mass-produced, which provides a good idea, but the amount of binder used will directly affect cast infiltration effect

[0005] Composite material grinding rollers (US2002136857(A1), US2007184235(A1)) produced by Marktor Company in Belgium use high wear-resistant ceramic particles to reinforce iron-based composite materials, which have high wear resistance and greatly improved service life, thus occupying the international market. There is a large market for large grinding rollers, but the ceramic particles used by the company are zirconia toughened alumina ceramics, which have slightly poor wettability with steel materials and limited bonding strength

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