A kind of preparation technology of metal-ceramic plate and metal-ceramic plate

Abstract

The preparation process of the cermet plate and the cermet plate provided by the present invention relate to the technical field of preparation of wear-resistant materials. The cermet plate is made by preheating the ceramic particles and the molten metal and then liquid forging and compounding. The injection into the metal liquid realizes the primary mixing of ceramic particles and metal liquid, and the pressure device pushes and squeezes the metal-ceramic mixed liquid to realize the secondary mixing of ceramic particles and metal liquid, and the two-time mixing improves the wettability of ceramic particles and metal liquid. Under the action of pressure, the encapsulation strength of the metal liquid on the ceramic particles is improved, and the ceramic particles are evenly dispersed in the metal liquid to avoid agglomeration. The combination of ceramic particles and metal is tighter than that of traditional cast metal composite ceramics. In addition, during liquid forging and compounding, through the extrusion of the metal-ceramic mixture and constant pressure feeding, the filling of the metal-ceramic mixture in the cavity is more in place and dense, and the strength and impact toughness of the metal-ceramic plate are further improved.

Description

technical field [0001] The invention relates to the technical field of preparation of wear-resistant materials, in particular to a preparation process of a metal-ceramic plate and a metal-ceramic plate. Background technique [0002] With the rapid development of modern industry and technology, production equipment in electric power, cement, mining, metallurgy and coal industries has higher and higher requirements for wear resistance of materials. For example, the wearing parts made of metal in the equipment are due to When in use, it is in contact with different rough materials such as coal mines, sand and soil, and the grinding body, which leads to the wear of metal parts, and consumes a large amount of metal every year. For production equipment, according to statistical analysis in the prior art, more than one third of the energy used for equipment work is related to friction and wear of materials. For metal parts, about 80% of the part failure is caused by the friction o...

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Problems solved by technology

Patent CN109467437A discloses a metal-ceramic composite wear-resistant material. First, silicon carbide particles, kaolin, metal silicon powder, additives and binders are used to prepare a porous silicon carbide ceramic substrate, and then high-temperature molten metal material is poured on the porous silicon carbide ceramic substrate. Prepared; through the organic combination of metal and ceramics, the strength, impact toughness and wear resistance of the material are improved; and as the preparation method of the cermet wear-resistant composite material disclosed in the patent CN104139185A, the ceramic particles or the surface pretreated Ceramic particles and self-fluxing alloy powder are uniformly mixed with polyvinyl alcohol to obtain a mixture; the above mixture is filled in the cavity of a press mold, and a common steel gasket is placed at the bottom of the cavity in advance. After the mixture is molded and demolded by the press, the green body Dry together with the gasket; Vacuum sinter the dried biscuit together with the gasket, and get a cermet wear-resistant composite material after cooling out of the furnace; After the ceramic particle composite material is pressed and sintered, it is composited on the surface of the wear-resistant part; The above-mentioned patents, including the metal-ceramic composite wear-resistant material formed by casting, and the process of sintering the green body and the gasket are to prepare the ceramic substrate separately, which will lead to uneven distribution of ceramic particles in the metal and poor bonding force , the matrix metal is restricted by the traditional casting method, and the instability of the mechanical properties also makes the plates made of the above materials easy to crack. It is not convenient for heat treatment after the metal and ceramics are combined, and the physical and chemical properties of the material are limited. Therefore, it is produced by traditional casting methods. It is difficult to popularize ferrous metal composite ceramic workpieces

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