A kind of high-strength closed-cell aluminum alloy foam and its preparation method

A foamed aluminum alloy and closed-cell foam technology, which is applied in the field of metal materials, can solve the problems of low strength of closed-cell foamed aluminum, and achieve the effects of increasing strength, improving purity, and increasing compressive yield strength

Active Publication Date: 2020-09-22
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problem of low strength of the existing closed-cell foamed aluminum, and provides a high-strength closed-cell foamed aluminum alloy and a preparation method thereof. In some cases, the strength of closed-cell aluminum foam is increased by more than 50%.

Method used

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  • A kind of high-strength closed-cell aluminum alloy foam and its preparation method
  • A kind of high-strength closed-cell aluminum alloy foam and its preparation method
  • A kind of high-strength closed-cell aluminum alloy foam and its preparation method

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Effect test

Embodiment 1

[0033] In this implementation, the chemical composition and weight percentage of the closed-cell foamed aluminum alloy are: Zn: 6.2%, Cu: 0.8%, Mg: 0.4%, Ca: 1.8%, Y: 0.06%, impurities equal to 0.2%, and the balance for Al.

[0034] The steps for preparing this high-strength closed-cell aluminum alloy foam are as follows:

[0035] Step 1: According to the mass ratio, add aluminum, Zn, Cu, and Y components in the melting furnace, wherein aluminum and Zn are in the form of pure aluminum and pure zinc, and Cu and Y are in the form of AlCu50 and AlY2 master alloys respectively. The alloy components are overheated to 875°C, and after all the components are melted, stir for 30 minutes;

[0036] Step 2: Vacuum pump the aluminum melt, set the vacuum degree to 700Pa, and pump for 14 minutes;

[0037] Step 3: Cool down the aluminum alloy melt to 710°C, add 0.4% Mg, and stir for 6 minutes;

[0038] Step 4: Transfer the aluminum alloy melt to a foaming furnace, control the temperature ...

Embodiment 2

[0041] In this implementation, the chemical composition and weight percentage of the closed-cell foamed aluminum alloy are: Zn: 8.0%, Cu: 1.0%, Mg: 0.5%, Ca: 2.3%, Y: 0.08%, impurities equal to 0.15%, and the balance for Al.

[0042] The steps for preparing this high-strength closed-cell aluminum alloy foam are as follows:

[0043] Step 1: According to the mass ratio, add aluminum, Zn, Cu, and Y components in the melting furnace, wherein aluminum and Zn are in the form of pure aluminum and pure zinc, and Cu and Y are in the form of AlCu50 and AlY2 master alloys respectively. Overheat the alloy components to 885°C, and stir for 35 minutes after all the components are melted;

[0044] Step 2: Carry out vacuum pumping treatment on the aluminum melt, set the vacuum degree to 900Pa, and pump for 11 minutes;

[0045] Step 3: Cool down the aluminum alloy melt to 705°C, add 0.5% Mg, and stir for 7 minutes;

[0046] Step 4: Transfer the aluminum alloy melt to a foaming furnace, cont...

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Abstract

The invention relates to a high-strength closed-cell foam aluminum alloy and a preparation method thereof. The chemical composition and weight percentage of the closed-cell foam aluminum alloy are: Zn: 5.0-8.3%, Cu: 0.5-1.2%, Mg: 0.3-0.6 %, Ca: 1.5-2.5%, Y: 0.05-0.10%, and the balance is Al. Compared with traditional closed-cell aluminum foam, its compressive strength is significantly improved under the same porosity.

Description

technical field [0001] The invention relates to a high-strength closed-cell foamed aluminum alloy and a preparation method thereof, belonging to the technical field of metal materials. Background technique [0002] Due to the existence of a large number of pores, the closed-cell foamed aluminum has multiple functional properties at the same time. Its density is lower than that of water, and it has good energy absorption, sound insulation, heat insulation, electronic shielding and other properties. It has been used in high-speed rail bodies and on both sides of roads. Sound insulation screens, rocket heat shields, truck cabins, buffer gun stocks, etc. At the same time, the existence of holes also causes the material density to be low, and the overall strength and stiffness of the material are lower than those of solid materials (the strength of traditional closed-cell aluminum foam is less than 10MPa), which limits its use as a secondary load-bearing component and pressure-be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/10C22C1/02C22C1/08
CPCC22C21/10C22C1/026C22C1/08C22C1/083
Inventor 丁小明孙丽娟黄粒张鹏飞杜旭初
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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