Method and device for thermally treating pulse current

Abstract

The invention relates to a method and a device for thermally treating a pulse current. The method comprises the following steps of: thermally treating the pulse current at protective atmosphere, wherein the frequency of the pulse current is 5 to 5,000Hz, the current peak is 10 to 5,000A and the pulse width is 0.2 to 2ms, and keeping a sample at a given temperature for several hours; or pushing a sealed quartz tube into a hearth, starting a pulse power source and a heating system, and performing composite thermal treatment of the pulse current and common thermal treatment, wherein the heating system can realize heat preservation at the temperature of between 100 and 1,300 DEG C for a long time. The device for thermally treating the pulse current mainly comprises the heating system, a protective atmosphere system, a water-cooled sealed system, the quartz tube and the pulse power source. The method and the device complete the thermal treatment process of a metal material by using the joule heating effect, the electroplastic effect, magnetic compressibility effect, skin effect and the like of the pulse current, and change the structure of the material to obtain the required performance.

Description

technical field [0001] The invention relates to a heat treatment method using pulse current and a device for realizing it, and belongs to the technical field of material processing and special heat treatment methods. Background technique [0002] With the development of society, human beings have higher and higher requirements for materials, and the preparation methods of materials are also continuously improved. Special processing methods are widely used in various fields. Among them, the special role of pulse current in the process of material preparation has been paid more and more attention. [0003] Pulse current has a significant effect on the plastic deformation and microstructure transformation of metal materials, as well as the diffusion-controlled second phase precipitation and growth. As early as 1861, M. Geradin observed the influence of pulse current on atomic motion in lead-tin and mercury-sodium metal melts. The influence of pulse current on the plastic def...

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Problems solved by technology

[0006] In short, applying a pulse current to a metal material can use the Joule heating effect, electroplastic effect, magnetic compression effect, skin effect, etc. of the pulse current to have an important impact on the tissue transformation, internal structure and processing of the material. However, many of the phenomena It has yet to be verified, and the mechanism of many verified phenomena still needs to be further studied. Therefore, there is an urgent need for a small laboratory equipment that can apply pulse current on the basis of ordinary heat treatment, and ensure the corresponding protective atmosphere, so as to study the effect of pulse current on material structure. The influence law of performance and the mechanism of action between the two can be realized at the same time. The comparative study of pulse current heat treatment and conventional heat treatment and the composite treatment research of pulse current heat treatment and conventional heat treatment can be realized at the same time.

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