Rare earth aluminum alloy foam and preparation method thereof

An aluminum alloy foam and rare earth technology, which is applied in the field of alloys to achieve the effects of low oxidation burnout rate and excellent corrosion resistance.

Inactive Publication Date: 2019-12-13
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention is to provide a kind of rare earth aluminum alloy foam and preparation method thereof, thus solve the aforementioned problems existing in the prior art

Method used

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  • Rare earth aluminum alloy foam and preparation method thereof

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preparation example Construction

[0023] like figure 1 As shown, the embodiment of the present invention provides a method for preparing a rare earth aluminum alloy foam, comprising the following steps:

[0024] Step 1, filling filler particles into the filling mold and preheating;

[0025] Step 2, heating the aluminum ingot in an inert gas atmosphere until it melts, adding magnesium, calcium, and rare earth to the melt in proportion, mixing and sucking it into the filling mold obtained in step 1 by vacuum;

[0026] Step 3, after the alloy is solidified, the sample is taken out, the filler particles are removed, and the rare earth aluminum alloy foam is obtained.

[0027] In the above technical solution, rare earth, magnesium and calcium are added to the molten aluminum, wherein magnesium accounts for 1% to 12% by mass of aluminum, calcium accounts for 0.5% to 4% by mass of aluminum, and rare earth accounts for 1% by mass of aluminum. The mass percentage is 0.10% to 1.2%.

[0028] Rare earth elements play a...

Embodiment 1

[0034] Step 1: Fill filler particles with a particle size of 1.4mm into the filling mold and preheat to 450°C;

[0035] Step 2, heating the aluminum ingot to 750°C in an argon atmosphere to melt, and then adding magnesium accounting for 5% of the mass percentage of aluminum and 2% of calcium accounting for aluminum to the melt in proportion The rare earth with a mass percentage of 1% is sucked into the filling mold obtained in step 1 under the vacuum condition of 0.04-0.06 MPa after mixing;

[0036] Step 3, after the alloy in the die is solidified, the sample is taken out, and the filler particles are removed to obtain the rare earth aluminum alloy foam.

Embodiment 2

[0038] Step 1: Fill filler particles with a particle size of 1.2mm into the filling mold and preheat to 470°C;

[0039] Step 2, heating the aluminum ingot to 790°C in an argon atmosphere to melt, and then adding magnesium accounting for 10% by mass percentage of aluminum, calcium accounting for 1% by mass percentage of aluminum, and The rare earth with a mass percentage of 0.5% is sucked into the filling mold obtained in step 1 under a vacuum condition of 0.04-0.06 MPa after mixing;

[0040] Step 3, after the alloy in the die is solidified, the sample is taken out, and the filler particles are removed to obtain the rare earth aluminum alloy foam.

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Abstract

The invention discloses rare earth aluminum alloy foam and a preparation method thereof, and relates to the technical field of alloy. A vacuum infiltration casting method is adopted, and the preparation method comprises the following steps of filling a filling mold with filler particles, and preheating; heating an aluminium ingot in an inert gas atmosphere until melting, adding magnesium, calciumand rare earth in a melt proportionally, uniformly mixing, and then performing vacuum suction in the filling mold in the step 1; and after the alloy is solidified, taking out a sample, and removing the filler particles, thereby obtaining the rare earth aluminum alloy foam. In the obtained rare earth aluminum alloy foam, a rare earth element and a magnesium element have lower oxidation burn out rate, and meanwhile, the rare earth aluminum alloy foam prepared according to the preparation method has excellent corrosion resistance.

Description

technical field [0001] The invention relates to the field of alloy technology, in particular to a rare earth aluminum alloy foam and a preparation method thereof. Background technique [0002] Aluminum foam has the advantages of light weight, high specific strength, sound absorption, sound insulation, heat dissipation, flame retardancy, shock absorption, damping, impact energy absorption, and electromagnetic shielding. Widely used in construction, auto parts, military and housing industries. [0003] At present, the main methods for preparing metal foam include infiltration casting method, melt foaming method, investment casting method, metal plating method, powder metallurgy method and so on. [0004] The infiltration method is directly infiltrated into the preform under the condition of molten metal. Compared with other methods, this method has the advantages of easy control of pore structure, porosity, short production cycle, low cost, and simple process. Adding rare ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C1/02C22C21/06C22C21/00
CPCC22C1/08C22C1/026C22C21/06C22C21/00C22C1/082
Inventor 刘芳洋艾燕蒋良兴贾明
Owner CENT SOUTH UNIV
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