A kind of preparation method of extrusion roller

Abstract

The invention belongs to the technical field of composite material preparation, and discloses a preparation method of an extrusion roller, which comprises: adding ceramic particles and metal powder to a powder mixing device at a volume ratio of 3:1-5 and fully mixing them; Add adhesive to the body according to the mass ratio of 3%-8%, stir evenly and add it to the stud preform forming mold, and obtain the shaped stud ceramic preform by heating and curing; fix the obtained stud ceramic preform to the die-casting Preheat in the mold, cast high-temperature molten metal, set a certain pressure and die-casting speed and keep the pressure, pressure cast and infiltrate to get composite studs; fix the obtained composite studs into the centrifuge mold and preheat, open The centrifuge injects the molten metal into the cavity of the mold, and after cooling, sand falls to obtain a composite stud extrusion roller. The invention combines the pressure casting infiltration technology and the centrifugal casting technology to prepare a ceramic reinforced metal matrix composite stud extrusion roller.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a preparation method of extrusion rolls. Background technique [0002] At present, with the rapid development of industry, in various industries such as cement, mining, metallurgy, and electric power, the wear and tear of materials is becoming more and more serious. The traditional single-steel wear-resistant materials can no longer meet the needs of complex working conditions. Ceramic reinforced metal matrix composites have the characteristics of high modulus, high specific strength, high wear resistance and high thermal stability of ceramic particles, as well as good toughness and impact resistance of the metal body. The production process is simple and the cost is low. Ideal material for grinding parts. At present, the most commonly used extrusion roller studs are cemented carbide studs prepared by powder sintering. However, the process of p...

AI Technical Summary

Problems solved by technology

[0005] (1) The process of the most commonly used extrusion roller studs is relatively complicated and the cost is high, which makes the production cost of the cemented carbide stud extrusion rollers high and cannot be put into use on a large scale

[0006] (2) The studs used are cemented carbide, and the studs are combined with the matrix by mechanical fastening, so that the preparation cost of the roller sleeve is still relatively high, and the bonding strength of the studs and the matrix of the roller sleeve is low, so that the studs and the matrix are relatively low. The roll body is prone to detachment

[0007] (3) The use of traditional surfacing technology increases manufacturing costs and poor wear resistance

[0008] The difficulty in solving the above problems and defects is: the root cause of the high production cost of cemented carbide stud extrusion rollers is the high price of cemented carbide materials. Therefore, if the studs are not made of relatively cheap materials, the traditional stud extrusion The problem of high production cost of rollers will be difficult to solve fundamentally

Images