Preparation method of prefabricated framework reinforcement compound grinding disc

A technology of reinforcement and prefabricated body, applied in the fields of food science, cocoa, grain processing, etc., can solve the problems of the deterioration of the base metal, difficult to guarantee the process, incomplete reaction of alloying elements, etc., and achieve good strength and stiffness, good comprehensive performance, Overall performance improvement effect

Inactive Publication Date: 2010-03-03
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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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

Method used

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  • Preparation method of prefabricated framework reinforcement compound grinding disc
  • Preparation method of prefabricated framework reinforcement compound grinding disc
  • Preparation method of prefabricated framework reinforcement compound grinding disc

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preparation example Construction

[0029] According to the preparation method of the prefabricated frame reinforced composite abrasive disc of the present invention, the prepared composite abrasive disc is composed of a skeleton reinforced body containing a hard phase and a matrix metal, which specifically includes the following steps:

[0030] (1) Select the tube wire with hard material inside, cut, bend, weave, superimpose the tube wire, and make the skeleton prefabricated body according to the millstone structure;

[0031] (2) Use refractory materials to fill the gaps in the skeleton prefabricated body, cover and compact them into blocks, and dry them to form blocks with certain strength;

[0032] (3) Put the block into a vacuum metallurgical sintering furnace for smelting and sintering. At high temperature, the outer steel skin of the tube wire and the hard material inside are melted and dissolved to form a sufficient metallurgical structure. Under the positioning of the refractory material, Let it solidify...

Embodiment 1

[0044] Example 1: Preparation of high chromium alloy skeleton reinforcement and high manganese steel composite grinding disc

[0045] see Figure 1~3, the preparation method of the present embodiment is carried out according to the following steps:

[0046] A. Select the pipe wire 1 with a diameter of φ2.8mm, the outer steel skin is low-carbon steel, and the prepared high-carbon ferrochrome powder 2 is installed inside, the particle size is 0.15-0.2mm, and the filling rate is 50%. According to the structure of the mill, the pipe wire 1 Cutting, bending, weaving, superposition to make skeleton prefabricated body;

[0047] B. Choose sodium silicate sand as the refractory material 3, fill it into the voids of the skeleton prefabricated body, cover and compact it into a block, and form a block with a certain strength after drying;

[0048] C. Put the block into a vacuum metallurgical sintering furnace for high-temperature smelting and sintering. The outer steel skin of the tube ...

Embodiment 2

[0054] Embodiment 2: making the composite grinding disc of tungsten carbide cemented carbide and 35 steel

[0055] see Figure 1~3 , the preparation method of the present embodiment is carried out according to the following steps:

[0056] A. Select the pipe wire 1 with a diameter of φ4.0mm, the outer steel skin is low-carbon steel, and the prepared tungsten carbide particles 2 are installed inside, the particle size is 0.5-1mm, and the filling rate is 30%. According to the structure of the mill, the pipe wire 1 is cut, Bending, braiding, superposition to make skeleton prefabricated body;

[0057] B. Select resin sand as the refractory material 3, fill it into the void of the skeleton prefabricated body, cover and compact it into a block, and form a block with a certain strength after drying;

[0058] C. Put the block into a vacuum metallurgical sintering furnace for high-temperature smelting and sintering. The outer steel skin of the tube wire 1 and the tungsten carbide par...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/02B02C7/12
Inventor 武宏许云华牛立斌
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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