Rare earth high-strength foam aluminum prepared through melt foaming method and preparation process of rare earth high-strength foam aluminum

A melt foaming method and technology of preparation process, applied in the field of foamed aluminum materials, can solve the problems of uneven porous structure of foamed metal, difficult process control, high density, etc., and achieve moderate size of pores, uniform density distribution, and low alloy. effect of temperature

Inactive Publication Date: 2017-02-22
ZHONGAN SHUNXING BEIJING SAFETY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is difficult to control, and the obtained metal foam has a non-uniform porous structure - large bubbles are concentrated in the center, and the closer to the chilled surface, the greater the density
In addition, most of the existing methods for preparing foamed aluminum are costly; therefore, how to reduce the cost of preparing foamed aluminum has become a technical problem to be solved urgently in this field

Method used

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  • Rare earth high-strength foam aluminum prepared through melt foaming method and preparation process of rare earth high-strength foam aluminum
  • Rare earth high-strength foam aluminum prepared through melt foaming method and preparation process of rare earth high-strength foam aluminum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Rare earth high-strength aluminum foam is mainly prepared from the following weight components:

[0035] 10kg of aluminum powder or aluminum ingot is added to the aluminum melting furnace, and the ratio is 85-99.3wt% of aluminum; 0.1-2wt% of rare earth additive; 0.3-5wt% of tackifier; and 0.5-6wt% of foaming agent.

[0036] Prepare as follows:

[0037] (1) heating and melting aluminum powder or aluminum ingot into aluminum liquid;

[0038] (2) adding rare earth additives for smelting to obtain a rare earth aluminum alloy melt;

[0039] (3) Add a tackifier to the rare earth aluminum alloy melt, and fully stir to increase the melt concentration;

[0040] (4) adding a foaming agent to the melt obtained in step (3), continuing to fully stir for heat preservation and foaming, to obtain a rare earth aluminum alloy foam;

[0041](5) Cooling and cutting to produce a rare-earth foamed aluminum bare board or further processing to make a rare-earth foamed aluminum sound-absorbi...

Embodiment 2

[0043] Rare earth high-strength aluminum foam is mainly prepared from the following weight components:

[0044] Add 10kg of aluminum powder or aluminum ingot to the aluminum melting furnace, with the ratio of 93wt% aluminum; 0.7wt% rare earth additive; 3wt% calcium metal; 2.5wt% titanium hydride powder.

[0045] Prepare as follows:

[0046] (1) After heating the aluminum melting furnace to a temperature of 300°C, add aluminum ingots or aluminum powder into the furnace;

[0047] (2) At a temperature of 450°C, add rare earth additives for melting, and then heat the temperature of the melting furnace to about 750°C to obtain a rare earth aluminum alloy melt;

[0048] (3) Add metal calcium to the rare earth aluminum alloy melt, and stir fully at a rotating speed of 500r / m to increase the melt concentration;

[0049] (4) Add titanium hydride powder to the melt obtained in step (3), continue to fully stir for heat preservation and foaming, the foaming temperature is 660 ° C, and t...

Embodiment 3

[0052] Rare earth high-strength aluminum foam is mainly prepared from the following weight components:

[0053] Add 10kg of aluminum powder or aluminum ingot to the aluminum melting furnace, with the ratio of 92.6wt% aluminum; 0.14wt% rare earth additive; 2.2wt% calcium metal; 2wt% titanium hydride powder.

[0054] The preparation method is as described in Example 2.

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Abstract

The invention relates to a rare earth high-strength foam aluminum prepared through a melt foaming method. The rare earth high-strength foam aluminum is made of, by mass percentage, 85%-99.3% of aluminum powder or an aluminum ingot, 0.1%-2% of a rare earth additive, 0.3%-5% of a tackifier and 0.5%-6% of a blowing agent. The blowing agent is selected from one or more of particulate metal calcium, silicon carbide, alumina and ceramic particles. The blowing agent is selected from one or more of titanium hydride powder, lanthanum hydride powder and zirconium hydride powder. According to the rare earth high-strength foam aluminum, through holes and closed holes exist at the same time, and the pore size and density distribution are uniform; and the process has the beneficial effects of being low in production cost and facilitating large-scale production.

Description

technical field [0001] The invention belongs to the field of foamed aluminum materials, in particular to rare earth high-strength foamed aluminum manufactured by a melt foaming method and a preparation process thereof. Background technique [0002] Foamed aluminum alloy material is obtained by mixing oxidized aluminum alloy powder with a substance separated during heating and gasification. Due to the different alloy components contained in aluminum, different heating procedures, and different gasified powders obtained when synthesizing new materials, the final foamed aluminum alloys have different densities, and the pores of the foams are also large and small. The foamed aluminum alloy material has certain sound insulation and heat insulation properties, is non-toxic and will not burn. The material can be sawed and milled, and can be screwed upwards. This light, strong and fire-resistant new material can be used for the veneer of elevator doors and the floor of trains and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/08
CPCC22C1/08C22C21/00C22C1/083
Inventor 刘甲祥徐友志贺浩
Owner ZHONGAN SHUNXING BEIJING SAFETY TECH CO LTD
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