Smelting furnace with mechanical agitation and high-energy ultrasonic processing and smelting method thereof

Abstract

The invention discloses a smelting furnace with mechanical agitation and high-energy ultrasonic processing and a smelting method thereof. The smelting furnace mainly comprises a furnace body, a furnace cover, a heating device, a protective gas input device, a mechanical agitation device and a high-energy ultrasonic processing device; wherein, the upper part of the furnace body is provided with an interface of the high-energy ultrasonic processing device, so that the furnace body can be connected with the high-energy ultrasonic processing device in a sealing way; the furnace cover is provided with an interface of the mechanical agitation device, so as to be connected with the mechanical agitation device in a sealing way. As the mechanical agitation device, the high-energy ultrasonic processing device and the protective gas input device are arranged on one smelting furnace, the molt can be stirred and fusion casted under the gas protection. The high-energy ultrasonic processing device is introduced into the smelting furnace, so that the problems of agglomeration and wetting property of reinforcement body grain, especially ultrafine grain in the composite material can be improved, and the smelting furnace has the effects of degasification, deslagging and refining grain; finally, the structural homogeneity and the mechanical property the composite material prepared by the smelting furnace can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of metal materials and metallurgy, and specifically relates to a smelting furnace and a smelting method thereof. Background technique [0002] Compared with its alloy matrix, metal matrix composites have higher specific strength, specific stiffness, wear resistance and high temperature resistance, so they have received attention in high-tech fields such as aviation, aerospace, automobile, machinery and electronics. Compared with long fiber, short fiber and whisker reinforced metal matrix composites, particle reinforced metal matrix composites have isotropic mechanical properties, simple preparation process, low cost of reinforcements, easy final forming, and easy machining. and other characteristics, it is currently the most likely to achieve low-cost, large-scale commercial production of metal matrix composites. [0003] At present, the main methods for preparing particle-reinforced metal matrix composites...

AI Technical Summary

Problems solved by technology

[0004] However, the stirred casting method has the disadvantage of high-temperature interfacial reaction, especially when preparing magnesium-based composites and other chemically active composite materials, it is generally necessary to add a covering agent to prevent oxidative combustion of the melt, and if the enhanced bulk density and matrix alloy When large gaps exist, it is difficult to distribute the reinforcing particles evenly in the composite

The addition of some ultrafine particles can easily cause agglomeration in the melt, thus affecting the casting quality and mechanical properties of composite materials

In addition, the wettability of non-metallic particles and alloy matrix is ​​poor, which will also affect the interface bonding of composite materials and even the overall performance of composite materials.

[0005] At present, the equipment for preparing particle-reinforced metal matrix composites by stirring casting method is mainly an ordinary melting furnace with mechanical stirring device, without vacuum or airtight chamber, and generally adding covering agent and refining agent during the melting process, the protection and melting effect is not very good Ideal, there are defects such as pores and shrinkage in the ingot, and the dispersion of reinforcing particles in the matrix is ​​not very good

In addition, with the development of nanotechnology, more and more scientific researchers try to add some ultrafine particles to composite materials in order to obtain new materials with better performance. However, the agglomeration of ultrafine particles in the melt The tendency is obviously larger than that of ordinary particles, making it difficult to distribute uniformly in the matrix alloy. Aiming at the special properties of such particle-reinforced metal matrix composites, especially some ultrafine particle-reinforced magnesium-based composites, a new type of melting furnace and The smelting method is particularly important

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