Preparation method of foamed aluminum alloy

A foamed aluminum alloy and aluminum melt technology, applied in the field of foam metal preparation, can solve the problems of complexity, difficulty in pouring, difficulty in homogenization of foaming agents, etc., and achieve the effects of reducing surface tension and increasing viscosity

Active Publication Date: 2016-12-14
郑州峰泰纳米材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is complicated to operate, and the viscosity of the melt is also strictly controlled. If the viscosity is too low, the gas is easy to escape, and if the viscosity is too high, it is difficult to cast.
[0007] The blowing agent used in the above two methods is TiH 2 Such as metal hydride, this kind of hydride starts to decompose and release hydrogen above 500 °C, and the hydrogen release speed is very fast. In order to reduce the loss of hydrogen, the conventional method is to increase the melt viscosity or shorten the stirring time, and stir in a short time Uniformity is not easy to achieve, therefore, it is difficult to homogenize the blowing agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing a foamed aluminum alloy, comprising the steps of:

[0022] 1) Melt the metal aluminum and heat it to 810°C, add a tackifier Ca accounting for 1% of its total mass to the aluminum melt, stir and mix for a reaction time of 15 minutes, so that the melt viscosity is stable;

[0023] 2) Cool the aluminum melt after step 1) to 650°C, add 0.2% of the total mass of the double-coated titanium hydride, and stir at 2000 rpm for 2 minutes. The melt is foamed at a constant temperature, and after the foaming is completed, it can be cooled and solidified by water.

[0024] Among them, the coating method of titanium hydride is to first process titanium hydride through alkaline degreasing, ultrasonic degreasing, sensitization and activation treatment, and then perform electroless iron plating treatment, and then grind and mix titanium hydride coated with iron with alumina made. The mass ratio of iron-coated titanium hydride to alumina is 0.5:0.2.

[0025] The a...

Embodiment 2

[0027] A method for preparing a foamed aluminum alloy, comprising the steps of:

[0028] 1) Melt the metal aluminum and keep it warm to 830°C, add 1.5% of the viscosity enhancer Ca to the aluminum melt, stir and mix the reaction time for 12 minutes, so that the melt viscosity is stable;

[0029] 2) Cool the aluminum melt after step 1) to 680°C, add 0.6% of the total mass of the double-coated titanium hydride, and stir at 2500 rpm for 4 minutes. The melt is foamed at a constant temperature, and after the foaming is completed, it can be cooled and solidified by water;

[0030] Among them, the coating method of titanium hydride is to first process titanium hydride through alkaline degreasing, ultrasonic degreasing, sensitization and activation treatment, and then perform electroless iron plating treatment, and then grind and mix titanium hydride coated with iron with alumina made. The mass ratio of iron-coated titanium hydride to alumina is 0.8:0.4.

[0031] The average pore d...

Embodiment 3

[0033] A method for preparing a foamed aluminum alloy, comprising the steps of:

[0034] 1) Melt the metal aluminum and keep it warm to 840°C, add 2.5% of the viscosity enhancer Ca to the aluminum melt, stir and mix the reaction time for 10 minutes, so that the melt viscosity is stable;

[0035] 2) Cool the aluminum melt after step 1) to 700°C, add 1.8% of the total mass of the double-coated titanium hydride, and stir at 3000 rpm for 8 minutes. The melt is foamed at a constant temperature, and after the foaming is completed, it can be cooled and solidified by water;

[0036] Among them, the coating method of titanium hydride is to first process titanium hydride through alkaline degreasing, ultrasonic degreasing, sensitization and activation treatment, and then perform electroless iron plating treatment, and then grind and mix titanium hydride coated with iron with alumina made. The mass ratio of iron-coated titanium hydride to alumina is 1.5:0.8.

[0037] The average pore d...

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Abstract

The invention provides a preparation method of foamed aluminum alloy. The preparation method of the foamed aluminum alloy comprises the following steps: (1) melting aluminum and insulating to the temperature of 800-850 DEG C, adding a tackifier Ca which accounts for 1%-4% of the total mass of aluminum melt into the aluminum melt, stirring and mixing evenly, and reacting for 5-15 minutes to enable the viscosity of the melt to be stable; (2) cooling the aluminum melt of which the viscosity is increased in the step (1) to the temperature of 650-750 DEG C, adding titanium hydride which accounts for 0.2-2.1% of the total mass of the aluminum melt and is coated in a double-layered manner in the aluminum melt, stirring for 2-12 minutes at high speed, foaming the stirred melt at constant temperature, and cooling with water and solidifying after foaming is finished. A titanium hydride coating method comprises the following steps: carrying out chemical iron plating treatment on titanium hydride at first; and then grinding and mixing the titanium hydride coated with iron and aluminum oxide to obtain the final product. The foamed aluminum alloy prepared by the preparation method is uniform in pore diameter distribution, the average pore size of foamed aluminum is 1.2-1.5 mm, and the porosity is 75-80%.

Description

technical field [0001] The invention belongs to the technical field of foam metal preparation, and in particular relates to a preparation method of foam aluminum alloy. Background technique [0002] Aluminum foam is an aluminum-based metal material containing a large number of closed spaces made by foaming after adding additives to pure aluminum or aluminum alloy, and has both metal and bubble characteristics. It is characterized by low density, high impact absorption ability, high temperature resistance, strong fire performance, corrosion resistance, sound insulation and noise reduction, low thermal conductivity, high electromagnetic shielding, strong weather resistance, filtering ability, easy processing, easy installation, and forming accuracy High, can carry out surface coating. It can be widely used in transportation, construction machinery, electronic communication, aerospace, environmental protection and other fields. [0003] Since the middle of the 20th century, c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C21/00
CPCC22C1/08C22C21/00C22C1/086
Inventor 李洋洋
Owner 郑州峰泰纳米材料有限公司
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