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

A foamed aluminum alloy and uniform pore technology is applied in the field of preparing foamed aluminum alloy special-shaped parts with uniform pore structure, which can solve the problems of large outgassing, concentrated shrinkage cavities, and difficulty in uniform porosity, and achieves simplified process, uniform pore structure, simple method effect

Inactive Publication Date: 2008-05-07
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

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Embodiment 1

[0021]A method for preparing aluminum alloy special-shaped parts with a uniform pore structure, comprising the following steps: the first step: heating the aluminum alloy to melt, wherein the aluminum alloy such as ZL101, ZL102, ZL111 series alloys can also be cast aluminum Copper-based alloys, grades such as ZL201, ZL202, ZL205 series alloys, or deformed aluminum alloys mainly containing copper or silicon, or aluminum alloys containing magnesium, such as ZL301, ZL302, etc., and adjust the temperature to 630 ° C -680°C, 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 Select 0.8%, 1.2%, 1.5%, 2.0%, 2.8%, 3.5%, 4.2%, 4.7%, stir at a speed of 500-800rpm for 60-500 seconds to disperse titanium hydride, for example, it can be selected as 500rpm, 600rpm, 700rpm, 750rpm, the stirring time can be selected as: 70s, 90s, 150s, 250s, 400s, 550s,...

Embodiment 2

[0024] A method for preparing aluminum alloy special-shaped parts with a uniform pore structure, comprising the following steps: the first step: heating the aluminum alloy to melt, wherein the aluminum alloy such as ZL101, ZL102, ZL111 series alloys can also be cast aluminum Copper-based alloys, grades such as ZL201, ZL202, ZL205 series alloys, or deformed aluminum alloys mainly containing copper or silicon, or aluminum alloys containing magnesium, such as ZL301, ZL302, etc., and adjust the temperature to 630 ° C -680°C, 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 Select 0.8%, 1.2%, 1.5%, 2.0%, 2.8%, 3.5%, 4.2%, 4.7%, stir at a speed of 500-800rpm for 60-500 seconds to disperse titanium hydride, for example, it can be selected as 500rpm, 600rpm, 700rpm, 750rpm, the stirring time can be selected as: 70s, 90s, 150s, 250s, 400s, 550s...

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Abstract

The invention discloses a method used for preparing a foaming aluminum alloy special form part with an even hole structure. The method comprises the following steps: firstly, aluminum alloy is warmed up to melt, titanium hydride is added, the mixing is performed to lead the titanium hydride to being deconcentrated, and then calcium is added to aluminum alloy solution, to be mixed and to add the viscosity of molten mass, the molten mass after being mixed is cooled down, and a fabricated part is obtained; secondly, the fabricated part is put in a die assembly, and heated and warmed up, and insulated at temperature, to lead the foaming aluminum alloy fabricated part to perform secondary foaming in the die assembly, foaming aluminum alloy after foaming is cooled down, to obtain a foaming aluminum alloy product. Before warming up to the secondary foaming in the second step, the primary foaming aluminum alloy fabricated part and the die assembly are firstly preheated and insulated. Before adding viscosity agent calcium, the titanium hydride is added firstly, the viscosity of the aluminum alloy solution is lower, and the invention is in favor of the titanium hydride being uniformly dispersed in the aluminum alloy molten mass within the shortest time, and in favor of preparing the large sized foaming aluminum alloy special form part with the even hole structure.

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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IPC IPC(8): B22D27/04C22C1/08
Inventor 尚金堂
Owner SOUTHEAST UNIV
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