Preparation method of framework reinforcement compound hammerhead

Abstract

The invention discloses a preparation method of a framework reinforcement compound hammerhead. The made compound hammerhead is formed by compounding a framework reinforcement containing hard phase anda base metal. The method comprises the following processes: making a framework prefabricated part by utilizing a pipe thread filled with hard materials; carrying out vacuum high temperature metallurgy sintering on the framework perform so as to make the framework reinforcement containing the hard phase; and compounding the framework reinforcement with the base metal for molding to form the hammerhead formed by compounding 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, and can keep complete framework structure when being compounded with the base metal. The invention not only exerts the highly wearable property of the hard phase in the framework 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 hammerheads widely used in fields such as crushing and grinding, and in particular to a method for preparing a framework-reinforced composite hammerhead. The composite hammer head 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 metallurgy, mining, building materials and other industrial industries, mechanical methods are generally used for crushing and grinding of materials. Hammer crushing equipment is a conventional machine equipment, and the hammer head, the main working part, is subjected to different degrees of impact and wear. , replacement is frequent, consumes a lot of money, and is the main wearing part. At present, the main material f...

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Problems solved by technology

[0003] (1) The matrix metal liquid must have sufficient high-temperature heat energy to ensure the melting and dissolution of the alloy powder core rod, but it is difficult to guarantee it in actual operation due to the limitation of the melting point of the matrix metal;

[0004] (2) Due to the effect of temperature difference, it is difficult to control the reaction of alloying elements. The alloying elements in the high temperature part are completely dissolved and diffused, and will be completely dissolved into the matrix metal, resulting in the variation of the matrix metal structure. The original toughness cannot be guaranteed, and the toughness cannot be achieved. The effect of material compounding; and the part with low temperature, the reaction of alloying elements is not complete, only plays the role of simple sintering, cannot form a sufficient metallurgical structure, the bonding strength is very poor, and the effect of strengthening cannot be achieved;

[0005] (3) Alloy powder core rods are easy to soften and deform at high temperatures, destroying the original arrangement order, and it is difficult to ensure the uniformity of compounding;

[0006] (4) Without preheating measures, the refrigeration effect of the alloy powder core rod can easily lead to premature cooling of the molten metal, poor fluidity, and failure to fill in place, resulting in casting defects such as insufficient pouring, cold shut, shrinkage cavity, etc., resulting in internal Composite quality is poor, performance is greatly limited

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