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Zn-contained high-strength aluminum-based lightweight medium-entropy alloy and preparation method thereof

An aluminum alloy and high-strength technology, which is applied in the field of high-strength aluminum-based light-weight medium-entropy alloys and their preparation, can solve problems such as difficulty in increasing strength, low alloy strength, and strength-limited development of aluminum alloy materials, and achieve machinability Improvement, improvement of mechanical properties, and the effect of increasing strength

Inactive Publication Date: 2019-08-09
李扬德 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, low strength limits the development of aluminum alloy materials, for this reason, many researchers have done a lot of work in optimizing alloy composition and alloying
[0003] The processed product is 5083 deformed aluminum alloy, referred to as 5083 aluminum alloy, which belongs to the Al-Mg alloy and has the advantages of good plasticity, corrosion resistance and machinability, but its alloy strength is low, and the alloy is a Heat treatment cannot strengthen the alloy, and it is difficult to improve its strength by heat treatment

Method used

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  • Zn-contained high-strength aluminum-based lightweight medium-entropy alloy and preparation method thereof
  • Zn-contained high-strength aluminum-based lightweight medium-entropy alloy and preparation method thereof

Examples

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preparation example Construction

[0029] A preparation method of a Zn-containing high-strength aluminum-based lightweight medium-entropy alloy, comprising the steps of:

[0030] Pre-treatment steps: use sandpaper to grind the 5083 aluminum alloy and Zn raw materials, and then use an electronic balance to weigh according to the formula amount, and make a ratio. The error of the ratio of each component is within the range of ±0.2%;

[0031] The step of placing the graphite crucible: placing the prepared aluminum alloy and Zn in the graphite crucible;

[0032] The steps of vacuum ventilation treatment: put the graphite crucible into the induction coil, and the induction coil is electrically connected with the high-frequency induction device; vacuumize with a mechanical pump, and then introduce argon;

[0033] Steps of high-frequency melting: turn on the power of the high-frequency induction device, and after the alloy ingot is completely melted, keep it warm for 12-18 minutes to make the alloy elements diffuse ev...

Embodiment 1

[0048] The molecular formula of the high-strength aluminum-based light-weight medium-entropy alloy in this example is 5083 aluminum alloy-xZn, where x=2%, and its preparation steps are as follows: 100 g of raw material Zn with a purity greater than 99.9% and 5083 aluminum alloy are prepared in proportion. Put the prepared raw materials into the graphite crucible in order of melting point from high to low, put the graphite crucible filled with the alloy material into the induction coil, evacuate to below 20Pa, and then fill with argon to 0.3MPa. Start the high-frequency induction device, and when the alloy ingot melts, keep it warm for 15 minutes to make the alloy composition uniform. Cast the uniformly smelted alloy liquid into a steel mold with a diameter of 30 mm. Homogenizing annealing, hot rolling, and solution and aging treatment are carried out on the ingot, wherein the annealing temperature is 460°C for 15 hours; the cumulative rolling reduction in the hot rolling is 80...

Embodiment 2

[0050] Such as Figure 1-2 As shown, the molecular formula of the high-strength aluminum-based light-weight medium-entropy alloy in this example is 5083 aluminum alloy-xZn, where x=4%, and the preparation steps are as follows: the raw material Zn with a purity greater than 99.9% and 5083 aluminum alloy are prepared in proportion 100g. Put the prepared raw materials into the graphite crucible in order of melting point from high to low, put the graphite crucible filled with the alloy material into the induction coil, evacuate to below 20Pa, and then fill with argon to 0.3MPa. Start the high-frequency induction device, and when the alloy ingot melts, keep it warm for 15 minutes to make the alloy composition uniform. Cast the uniformly smelted alloy liquid into a steel mold with a diameter of 30mm. Homogenizing annealing, hot rolling, and solution and aging treatment are carried out on the ingot, wherein the annealing temperature is 460°C for 15 hours; the cumulative rolling red...

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Abstract

The invention discloses a Zn-contained high-strength aluminum-based lightweight medium-entropy alloy and a preparation method thereof. The alloy composition of the medium-entropy alloy is aluminum alloy containing 5083 aluminum alloy-xZn, wherein x is the mass percentage of Zn in the total alloy composition, x is greater than 0 and no more than 6%, and the proportion error of each composition is within + / - 0.2%. The design idea of the alloy is from the point of view of the formation entropy, on the basis of the 5083 deformed aluminum alloy, the Zn element is added so as to improve the formation entropy of the alloy, and meanwhile, the alloy becomes the heat-treatable reinforced alloy; and then through the corresponding heat treatment process including vacuum induction smelting and the useof gravity casting, homogenization treatment, solidification and aging and the like, the strength of the alloy is improved accordingly, the machinable property is improved, and the application prospect of the alloy is expanded.

Description

technical field [0001] The invention relates to a metal material preparation technology, in particular to a Zn-containing high-strength aluminum-based lightweight medium-entropy alloy and a preparation method thereof. Background technique [0002] Aluminum is one of the most widely distributed and most abundant metal elements in the earth's crust. The entire development history of the aluminum industry is only two hundred years old, but because aluminum and its alloys have a series of excellent characteristics, the development speed is very fast, and they have been widely used in transportation, packaging containers, architectural decoration, aerospace, electronic communications, etc. It is an important basic material for national economy and improvement of people's material life and cultural life. Since the mid-20th century, the continuous emergence of new materials has promoted the rapid advancement of science and technology, and the high-speed development of various indu...

Claims

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Application Information

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IPC IPC(8): C22C21/10C22C1/03C22F1/053
CPCC22C1/026C22C1/03C22C21/10C22F1/002C22F1/053
Inventor 李扬德
Owner 李扬德
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