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High-pressure strain device and preparation method of high-pressure reinforced metal

A high pressure, pressure cavity technology, applied in the field of material processing, can solve problems such as single axial force

Active Publication Date: 2021-09-03
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing high-pressure torsion-reinforced aluminum experimental assembly structure usually can only provide a single axial force, and cooperate with the anvil to rotate a certain angle to obtain a tangential force for the experiment.

Method used

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  • High-pressure strain device and preparation method of high-pressure reinforced metal
  • High-pressure strain device and preparation method of high-pressure reinforced metal
  • High-pressure strain device and preparation method of high-pressure reinforced metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Cutting and annealing the high-purity aluminum column in sequence to obtain oblique round high-purity aluminum column (mass fraction 99.999%), the angle of inclination is 30°. according to figure 1 Assembly method Install the oblique cylindrical high-purity aluminum column in the sample chamber 152 and perform high-pressure deformation. First, increase the pressure for 10 minutes, then maintain the pressure at a pressure of 0.5 GPa for 30 minutes, and then release the pressure for 10 minutes to obtain a high-pressure sample with a deformation degree of 22%. Pure aluminum column, take out the deformed high-purity aluminum column and grind and polish it.

[0067] figure 2 Metallographic diagrams of high-purity aluminum samples before and after high-pressure deformation. The metallographic diagram obtained by observing the microstructure of the high-purity aluminum column without high-pressure deformation, the observation result is figure 2 In figure a in the middle, ...

Embodiment 2

[0070] The difference between Example 2 and Example 1 is that the pressure is 1.5 GPa, a high-purity aluminum column with a deformation degree of 54% is obtained, and the deformed high-purity aluminum column is taken out and polished.

[0071] The metallographic diagram obtained by observing the microstructure of a high-purity aluminum column with a deformation degree of 54% after grinding and polishing, the observation result is figure 2 Figure c, from figure 2 middle a map and figure 2 From the comparison in c, it can be seen that the metallographic structure size of the high-pressure pure aluminum sample prepared in the example of the present invention is obviously smaller than the metallographic structure size of the pure aluminum sample annealed before high pressure.

[0072] The microhardness test was carried out on the high-purity aluminum column with a degree of deformation of 54% after high-pressure strain in Example 2. The test results showed that the microhardne...

Embodiment 3

[0074] The difference between Example 3 and Example 1 is that the pressure is 2 GPa, a high-purity aluminum column with a deformation degree of 68% is obtained, and the deformed high-purity aluminum column is taken out and polished.

[0075] The metallographic diagram obtained by observing the microstructure of a high-purity aluminum column with a deformation degree of 68% after grinding and polishing, the observation result is figure 2 Middle d figure, from figure 2 middle a map and figure 2 From the comparison in figure d, it can be seen that the metallographic structure size of the high-pressure pure aluminum sample prepared in the example of the present invention is obviously smaller than the metallographic structure size of the pure aluminum sample annealed before high pressure.

[0076] The microhardness test was carried out on the high-purity aluminum column with a degree of deformation of 68% after high-pressure strain in Example 3. The test result shows that the m...

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Abstract

The invention provides a high-pressure strain device and a preparation method of high-pressure reinforced metal, and relates to the technical field of material processing. The high-pressure strain device comprises a first cylindrical pressure transmitting medium, a first pressurizing block and a second pressurizing block. A first cylindrical cavity is formed in the first cylindrical pressure transmitting medium. The first pressurizing block and the second pressurizing block are respectively arranged at two ends of the first cylindrical cavity, and a gap is formed between the first pressurizing block and the second pressurizing block, so that a sample cavity is formed between the first pressurizing block and the second pressurizing block. The end face, close to the second pressurizing block, of the first pressurizing block is a first inclined face. The contact face of the metal block and the first pressurizing block is an inclined face, the included angle between the inclined face and the axis of the cylindrical pressure transmitting medium is an acute angle, pressure and shearing force are transmitted to the metal block through the pressure transmitting medium, pressure and shearing force can be generated in the axial direction and the radial direction of the metal block, high-pressure enhancement can be well carried out on metal without being matched with rotation of a bottom anvil, and the hardness of the metal subjected to pressurization treatment is higher.

Description

technical field [0001] The present application relates to the technical field of material processing, in particular to a high-pressure strain device and a method for preparing a high-pressure reinforced metal. Background technique [0002] Aluminum and its alloys are light metals with broad application prospects, but they have problems such as low hardness and poor toughness, which limit their application to a certain extent (some have higher requirements for hardness and toughness) scene). In order to increase the hardness of aluminum and its alloys, one of the treatment methods can be: using high-pressure torsion (1-5GPa) to compress aluminum to increase the hardness of the material, which has a certain effect. [0003] However, the existing high-pressure torsion-reinforced aluminum experimental assembly structure usually can only provide a single axial force, and cooperate with the anvil to rotate at a certain angle to obtain a tangential force for the experiment. This ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
CPCC22F1/04
Inventor 王培熊万能赵予生王李平
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA