Method for preparing foamed aluminium alloy product by secondary foaming

A foamed aluminum alloy and foaming technology, which is applied in the field of secondary foaming to prepare foamed aluminum alloy products, can solve the problems of high cost and unstable process, and achieve the effects of high cost, simplified process and simple method.

Inactive Publication Date: 2008-06-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are insurmountable difficulties in the direct preparation of special-shaped parts, sandwich structures, foamed aluminum alloy fillers, embedded parts, etc. by the traditional melt foaming method, while there are costs in the preparation of foamed aluminum special-shaped parts, sandwich structures, etc. High, unstable process and other defects

Method used

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  • Method for preparing foamed aluminium alloy product by secondary foaming
  • Method for preparing foamed aluminium alloy product by secondary foaming
  • Method for preparing foamed aluminium alloy product by secondary foaming

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Embodiment 1 A method for preparing foamed aluminum alloy products through secondary foaming, comprising the following steps:

[0043] Step 1: Heat the aluminum alloy to melt, and adjust the temperature to 630°C-680°C, add calcium equivalent to 0.5%-5% of the weight of the aluminum alloy to the molten aluminum alloy, stir for 1-30 minutes, and then add Titanium hydride equivalent to 0.5%-5% of the weight of the aluminum alloy, stirring to distribute the titanium hydride evenly in the melt, cooling the stirred melt, and obtaining a primary foamed aluminum alloy preform with a porosity lower than 70%;

[0044] Step 2: Put the above-mentioned primary foamed aluminum alloy prefabricated part with a porosity lower than 70% into the mold, and keep it warm at a temperature of 700°C to 1200°C for 3 to 40 minutes, so that the primary foamed aluminum alloy preformed Secondary foaming in the mould, cooling the foamed aluminum alloy to obtain a foamed aluminum alloy product.

Embodiment 2

[0045] Embodiment 2 A method for preparing foamed aluminum alloy products through secondary foaming, comprising the following steps:

[0046] Step 1: Heat the aluminum alloy until it melts. Among them, aluminum alloys such as ZL101, ZL102, ZL111 series alloys, or cast aluminum-copper alloys, grades such as ZL201, ZL202, ZL205 series alloys, or alloys mainly containing copper or Mainly deformed aluminum alloys containing silicon, can also be aluminum alloys containing magnesium, such as ZL301, etc., adjust the temperature to 630°C-680°C, and the temperature can be 635°C, 642°C, 650°C, 660°C, 665°C, 670°C , adding calcium equivalent to 0.5%-5% of the weight of the aluminum alloy to the molten aluminum alloy, the amount of calcium added can be selected as 0.8%, 1.2%, 1.5%, 2.0%, 2.8%, 3.5%, 4.2%, 4.7%, stirring for 1-30 minutes, the stirring time can be selected as 3 minutes, 8 minutes, 10 minutes, 15 minutes, 22 minutes, 25 minutes, the stirring speed can be 300-600rpm, and then...

Embodiment 3

[0049] Embodiment 3 A method for preparing foamed aluminum alloy products through secondary foaming, comprising the following steps:

[0050] Step 1: Heat the aluminum alloy until it melts. Among them, aluminum alloys such as ZL101, ZL102, ZL111 series alloys, or cast aluminum-copper alloys, such as ZL201, ZL202, ZL205 series alloys, or mainly copper-containing or mainly Silicon-containing deformed aluminum alloy, adjust the temperature to 630°C-680°C, the temperature can be 635°C, 642°C, 650°C, 660°C, 665°C, 670°C, add 0.5%-5% of the weight of the aluminum alloy Calcium to the aluminum alloy melt, the addition of calcium can be selected as 0.8%, 1.2%, 1.5%, 2.0%, 2.8%, 3.5%, 4.2%, 4.7%, stirring for 1-30 minutes, the stirring time can be selected as 3 minutes, 8 minutes, 10 minutes, 15 minutes, 22 minutes, 25 minutes, the stirring speed can be 300-600rpm, and then add titanium hydride equivalent to 0.5%-5% of the weight of the aluminum alloy, the amount of titanium hydride ca...

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Abstract

This invention discloses a method of preparing foamed aluminum alloy product with second foaming technique, it includes following steps: first, heating aluminum alloy to the state of eliguation, and adjusting the temperature to 630-680DEG C, adding calcium into aluminum alloy flux, agitating for 1-30 minutes, then adding and agitating titanium hydride to make titanium hydride uniform-distribution in the flux, cooling the flux to get first foamed aluminum alloy prefab, of which the porosity is lower than 70%; second, putting the said first foamed aluminum alloy prefab into a mold, and insulating for 3-40 minutes under the temperature of 700DEG C-1200DEG C to make first foamed aluminum alloy prefab second foaming in the mold, cooling the foamed aluminum alloy to get foamed aluminum alloy product. This invention is of simplicity, and low cost, it can be used to produce foamed aluminum alloy heterotype, sandwich structure, filling member of foamed aluminum alloy and foamed aluminum alloy product with embedded inserts with many kinds of even factor of porosity.

Description

technical field [0001] The invention relates to a method for preparing a foamed aluminum alloy product, in particular to a method for preparing a foamed aluminum alloy product through secondary foaming. Background technique [0002] The ultra-light metal structure with closed-cell aluminum foam as the focus realizes lightweight and multi-functional structural materials due to its special pore structure, thus becoming a hot spot in aerospace and high technology. [0003] Due to the needs of civil and high-tech fields such as automobiles, aluminum foam special-shaped parts and sandwich structures are becoming the forefront of the field of foam metal preparation. There are insurmountable difficulties in the direct preparation of special-shaped parts, sandwich structures, foamed aluminum alloy fillers, embedded parts, etc. by the traditional melt foaming method, while there are costs in the preparation of foamed aluminum special-shaped parts, sandwich structures, etc. High, uns...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C21/00
Inventor 何德坪尚金堂何思渊褚旭明
Owner SOUTHEAST UNIV
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