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A kind of manufacturing method of foamed aluminum alloy

A foamed aluminum alloy and a manufacturing method, which are applied in the field of porous metal materials and can solve the problems of many pore wall defects, uneven pore size, poor pore shape of the foamed aluminum alloy, and the like

Active Publication Date: 2020-10-20
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a method for manufacturing foamed aluminum alloys, so as to improve the problems of the foamed aluminum alloys prepared by the existing methods, such as poor cell shape, uneven pore diameter, and many hole wall defects, and improve the strength, toughness and elasticity of foamed aluminum. Modulus; at the same time increase the foam expansion rate, reduce the foam temperature, and reduce energy consumption

Method used

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  • A kind of manufacturing method of foamed aluminum alloy
  • A kind of manufacturing method of foamed aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The process of preparing the foamed aluminum alloy whose alloy composition is Al-6Mg is as follows:

[0048] (1) Use TiH with an average particle size of 30 μm 2 Powder, the surface of the powder is covered with a layer of Mg metal layer by mechanical grinding method to make TiH 2 +Mg composite particles, the total weight of the powder after coating is increased by 3 times, which is equivalent to the average thickness of the Mg metal layer between 13 and 15 μm;

[0049] (2) Weigh 920g of 150 purpose pure aluminum powder (purity is 99.7%), TiH 2 +Mg composite particles 80g, making TiH 2 The mass fractions of , Mg and Al are respectively 2.0wt%, 6.0wt% and 92wt%, all of which are loaded into the mixing tank, mixed on the mixer for 8 hours, and mixed powder is made;

[0050] (3) Put the mixed powder into a steel mold and place it in a hot press, first heat the hot press to 470°C, keep it warm for 30 minutes and then press it with a pressure of 50MPa. After hot pressing,...

Embodiment 2

[0054] The process of preparing the foamed aluminum alloy whose alloy composition is Al-6Cu is as follows:

[0055] (1) Use TiH with an average particle size of 30 μm 2 Powder, the surface of the powder is covered with a layer of Cu metal layer by electroless plating method to make TiH 2 +Cu composite particles, the total weight of the powder after coating is increased by 6 times, which is equivalent to the average thickness of the Cu metal layer between 6 and 8 μm;

[0056] (2) Weigh 930g of 150 purpose pure aluminum powder (purity is 99.7%), TiH 2 +Cu composite particles 70g, making TiH 2 The mass fractions of , Cu and Al are respectively 1.0wt%, 6.0wt% and 93wt%, all of which are loaded into the mixing tank, mixed on the mixer for 8 hours, and mixed powder is made;

[0057] (3) Put the mixed powder into a steel mold and place it in a hot press. First heat the hot press to 560°C, keep it warm for 30 minutes and then press it with a pressure of 50 MPa. After hot pressing, ...

Embodiment 3

[0061] The process for preparing the foamed aluminum alloy whose alloy composition is Al-20Zn is as follows:

[0062] (1) Use TiH with an average particle size of 15 μm 2 The powder is coated with a layer of Zn metal layer on the surface of the powder by electroless plating method to make TiH 2 +Zn composite particles, the total weight of the powder after coating is increased by 10 times, which is equivalent to the average thickness of the Zn metal layer between 6 and 7 μm;

[0063] (2) Weigh 780g of 150 purpose pure aluminum powder (purity is 99.7%), TiH 2 +Zn composite particles 220g, making TiH 2 The mass fractions of , Zn and Al are respectively 2wt%, 20wt% and 78wt%, all of which are packed into a mixing tank, and mixed on a mixer for 24 hours to make a mixed powder;

[0064] (3) Put the mixed powder into a steel mold and place it in a hot press, first heat the hot press to 420°C, keep it warm for 30 minutes and then press it with a pressure of 50 MPa. After hot pressi...

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Abstract

The invention discloses a preparation method of foamed aluminum alloy, and belongs to the field of porous metal materials. The method comprises the following steps that the surfaces of foaming agent particles are coated with a metal layer to prepare composite particles; the composite particles is uniformly mixed with an aluminum powder to prepare mixed powder, wherein the mass fraction of the foaming agent particles is 0.6 wt%-2 wt%; hot-pressing densification is performed on the mixed powder so as to obtain a foamed prefabricated part; the foamed prefabricated part is put into a heating furnace for heating and foaming, so that the prefabricated part is fully expanded to obtain the foamed aluminum alloy. The foamed aluminum alloy manufactured by the method disclosed by the invention is good in hole pattern, uniform in bore diameter and small in pore wall defect, so that the strength, the toughness and the elasticity modulus of the foamed aluminum are relatively high, and heat treatmentintensity potential is high as well; then the types and the contents of the alloy elements can be flexibly controlled by adjusting the thickness and the composition of a metal coating layer, so thata large space is provided for the performance design of the foamed aluminum; and in addition, the foaming expansion rate can be improved as well, the foaming temperature can be reduced, and the energyconsumption can be reduced.

Description

technical field [0001] The invention relates to a method for manufacturing a foamed aluminum alloy, belonging to the field of porous metal materials. Background technique [0002] Aluminum foam is a new type of metal porous material with material-structure integration. Aluminum foam has excellent comprehensive properties such as low specific gravity, high specific stiffness, impact resistance, good vibration damping performance, and electromagnetic shielding. Therefore, it has broad application prospects in the fields of automobiles, rail trains, construction, electronics, and national defense. There is an urgent need for lightweight and multifunctional materials. [0003] The preparation methods of aluminum foam include: blowing method, melt foaming method and powder metallurgy prefabricated body foaming method, etc. Among them, the powder metallurgy prefabricated body foaming method is to mix aluminum powder and titanium hydride powder and compact it to form a prefabrica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C21/00C22F1/04
Inventor 刘彦强樊建中赵月红马自力杨必成魏少华聂俊辉邬小萍郝心想左涛
Owner 有研金属复材技术有限公司
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