Method for producing bubble aluminum alloy special-shaped member with even pore structure

A foamed aluminum alloy and aluminum alloy technology, which is applied in the field of preparing foamed aluminum alloy special-shaped parts with a uniform pore structure, can solve the problems of large amount of outgassing, concentrated shrinkage cavities, and unstable process, and achieve simplified process, uniform pore structure, and reduced cost effect

Inactive Publication Date: 2009-12-02
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
However, the newly developed method for preparing foamed aluminum alloy special-shaped parts by secondary foaming by applicants overcomes the shortcomings of the above-mentioned method. However, when preparing larger-sized foamed aluminum alloy special-shaped parts, the porosity is still difficult to be uniform. Its main The problem lies in: the preparation method of first increasing the viscosity and then adding titanium hydride, when preparing larger-sized foamed aluminum alloy special-shaped parts, the uneven distribution of titanium hydride in it leads to excessive local titanium hydride during secondary foaming. Concentrated shrinkage cavity is formed due to excessive local outgassing
In addition, since the foamed aluminum alloy preform with a larger size is not easy to be heated uniformly during the secondary foaming process, it is also easy to cause the pore structure of the foamed aluminum alloy product obtained by the secondary foaming to be uneven.

Method used

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  • Method for producing bubble aluminum alloy special-shaped member with even pore structure
  • Method for producing bubble aluminum alloy special-shaped member with even pore structure

Examples

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Embodiment 1

[0021] A method for preparing a foamed aluminum alloy shaped part with a uniform pore structure, comprising the following steps:

[0022]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 The deformed aluminum alloy mainly containing silicon can also be aluminum alloy containing magnesium, such as ZL301, ZL302, etc., and 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, 675°C, adding titanium hydride equivalent to 0.5%-5% of the weight of the aluminum alloy, the amount of titanium hydride can be selected as 0.8%, 1.2%, 1.5%, 2.0%, 2.8%, 3.5%, 4.2% %, 4.7%, stirring at a speed of 500-800rpm for 60-500 seconds to disperse titanium hydride, for example, 500rpm, 600rpm, 700rpm, 750rpm can be selected, and the stirring time can be selected...

Embodiment 2

[0025] A method for preparing a foamed aluminum alloy shaped part with a uniform pore structure, comprising the following steps:

[0026] 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 The deformed aluminum alloy mainly containing silicon can also be aluminum alloy containing magnesium, such as ZL301, ZL302, etc., and 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, 675°C, adding titanium hydride equivalent to 0.5%-5% of the weight of the aluminum alloy, the amount of titanium hydride can be selected as 0.8%, 1.2%, 1.5%, 2.0%, 2.8%, 3.5%, 4.2% %, 4.7%, stirring at a speed of 500-800rpm for 60-500 seconds to disperse titanium hydride, for example, 500rpm, 600rpm, 700rpm, 750rpm can be selected, and the stirring time can be selecte...

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Abstract

The invention discloses a method for preparing a foamed aluminum alloy special-shaped piece with a uniform pore structure, which comprises the following steps: the first step: heating the aluminum alloy to melt, adding titanium hydride, stirring to disperse the titanium hydride, and then adding calcium to aluminum In the molten alloy, stir to increase the viscosity of the melt, cool the stirred melt to obtain a preform; the second step: put the above preform into the mold, heat it up, and keep it warm at this temperature, The primary foamed aluminum alloy prefabricated part is made into secondary foam in the mould, and the foamed aluminum alloy is cooled to obtain a foamed aluminum alloy product. In the second step, before the secondary foaming is heated up, the primary foamed aluminum alloy prefabricated part and the mold are preheated and kept warm. In the present invention, titanium hydride is added before the tackifier calcium is added, and the viscosity of the aluminum alloy melt is low, which is conducive to the uniform dispersion of titanium hydride in the aluminum alloy melt in a relatively short period of time, and is conducive to the preparation of a uniform pore structure. Dimensional foam aluminum alloy profiled parts.

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 special-shaped piece with a uniform pore structure. Background technique [0002] Due to the special pore structure, the closed-cell aluminum alloy foam has become one of the current hot materials because of its light weight and multi-functional structural materials. 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, unstable process and other defects. Howev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D27/04C22C1/08
Inventor 尚金堂
Owner SOUTHEAST UNIV
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