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Amorphous alloy additive and preparation method of amorphous alloy component

A technology for amorphous alloys and components, applied in the directions of additive processing, process efficiency improvement, energy efficiency improvement, etc., can solve the problems of inability to realize pure amorphous alloy preparation, small penetration depth, etc., to overcome the formation of nanocrystalline, Effects of high cooling rates, high heating rates, and cooling rates

Pending Publication Date: 2021-03-30
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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Problems solved by technology

However, the penetration depth of this infrared laser light source for metal materials is very small, and it can only form direct heating on the surface of the metal powder, and then transfer heat to the inside and surroundings through heat conduction to melt the entire micro-area, which leads to the entire thermal impact. area significantly larger than the laser spot
In addition, this technology mainly achieves rapid cooling by changing the laser power and scanning speed, and the cooling speed can only reach 10 4 K / s-10 6 K / s
Due to the above limitations, the amorphous alloys obtained by the prior art tend to contain nanocrystalline grains, which are composite materials of amorphous and nanocrystalline, and the preparation of pure amorphous alloys cannot be realized.

Method used

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  • Amorphous alloy additive and preparation method of amorphous alloy component

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Embodiment 1

[0033] This embodiment provides a method for preparing an amorphous alloy additive, the preparation method comprising:

[0034] Use a pulse laser to heat Al to melt, and by limiting the pulse width of the pulse laser to 1 ns, the pulse laser wavelength to 1064 nm, the single pulse intensity of the pulse laser to 0.5 μJ, and the spot size to 5 μm, the melting of the metal material is achieved. Rapid cooling, cooling rate up to 6.1×10 11 K / s.

[0035] The TEM image of the amorphous Al sample prepared in this example is as follows figure 1 shown, from figure 1 It can be seen that there is a large area of ​​amorphous area in the cross section of this sample, which is significantly different from the diffraction spot of the surrounding crystalline area without laser pulse heat treatment.

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Abstract

The invention provides a preparation method of an amorphous alloy additive. The preparation method comprises the following steps of heating a metal material by using pulse laser of which the frequencyis higher than the plasma frequency of the processed metal material until the metal material is molten, and quickly cooling the molten metal material by limiting the pulse width of the pulse laser tobe 10fs-1ms. According to the preparation method, a amorphous alloy three-dimensional part can be manufactured, generation of nano-crystalline grains in the amorphous alloy can be avoided, and applicable amorphous alloy components are remarkably larger than those of an amorphous alloy component area covered in the prior art.

Description

technical field [0001] The invention belongs to the field of metal material manufacturing, and relates to an amorphous alloy additive and a preparation method of an amorphous alloy part. Background technique [0002] Amorphous alloy (also known as metallic glass) refers to a metal material with disordered structure on the atomic scale. Most metal materials have a highly ordered structure, and the atoms are arranged periodically (crystal), showing translational symmetry, or rotational symmetry, mirror symmetry, angular symmetry (quasicrystal), etc. In contrast, amorphous metals do not have any long-range ordered structure, so there are no grains and grain boundaries in amorphous alloys. Compared with traditional crystalline alloys, amorphous alloys have many advantages, such as high hardness, high strength, high corrosion resistance, superplasticity, and better soft magnetic properties. Due to the structural characteristics of short-range order and long-range disorder of am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/105C22C45/00B33Y10/00B33Y80/00
CPCC22C45/00B33Y10/00B33Y80/00Y02P10/25
Inventor 沈美项晓东赵府张鹏
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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