Preparation method of prefabricated framework reinforcement compound grinding disc

Abstract

The invention discloses a preparation method of a prefabricated framework reinforcement compound grinding disc. The made compound grinding disc is compounded by a framework reinforcement containing hard phase and a base metal. The method adopts the following processes: making a framework prefabricated part by utilizing a pipe thread filled with hard materials; carrying out vacuum high-temperaturemetallurgy sintering on the framework prefabricated part to form the framework reinforcement containing the hard phase; and compounding the framework reinforcement with the base metal for molding to form the grinding disc compounded by the framework reinforcement containing the hard phase and the base metal. The framework reinforcement forms a sufficient metallurgical structure through vacuum high-temperature metallurgy sintering, has orderly arrangement, uniform distribution, stable performance and strong integrity, can keep a complete framework structure when being compounded with the base metal. The invention not only exerts high-wearing property of the hard phase in the skeleton reinforcement, but also keeps good toughness of the base metal, and can carry out local compound, graded compound or overall compound, thereby achieving the best use effect and obviously enhancing the comprehensive property.

Description

technical field [0001] The invention relates to the preparation of a grinding disc widely used in the field of crushing and grinding, in particular to a preparation method of a prefabricated skeleton reinforcement composite grinding disc. The composite grinding disc prepared by the method is composed of a high-hardness skeleton reinforcement and a matrix metal, which not only exerts the high wear resistance of the reinforcement, but also retains the good toughness of the matrix metal, and the comprehensive performance is significantly improved. Background technique [0002] In thermal power, cement, steel and other industries, the pulverizing system is a very critical link. Coal powder, ore, etc. need to be ground to a certain particle size to meet the use requirements. Due to the advantages of high efficiency, energy saving, safety and reliability, the vertical mill has been widely used. During the working process, the key component of the grinding disc not only bears the f...

AI Technical Summary

Problems solved by technology

This method mainly uses the heat of high-temperature molten metal to melt and dissolve the alloy powder core wire, so that it can react in situ to form a columnar hard phase. The alloying elements in the part where the temperature is low will completely dissolve and diffuse, and they will all dissolve into the matrix metal, resulting in the deterioration of the matrix metal. Due to the effect of sintering, a complete metallurgical structure cannot be formed, and the effect of reinforcement cannot be achieved; at the same time, the alloy powder core wire is easy to soften and deform at high temperature, destroying the orderly arrangement of the preform, and it is difficult to ensure the uniformity of the composite

In addition, due to the lack of preheating measures, the cooling effect of the alloy powder core wire can easily lead to premature cooling of the molten metal, resulting in casting defects such as insufficient pouring, cold shut, shrinkage cavity, etc. hard to guarantee

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