Preparation method of in-situ nanoparticle and rare earth coupling reinforced aluminum-based composite material

A technology of nano-particles and composite materials, applied in the field of aluminum-based composite materials, can solve problems such as materials being easily corroded, and achieve the effects of improving strength, corrosion resistance, high-strength plasticity and impact resistance.

Active Publication Date: 2022-04-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of clusters of nanoparticles has always been a difficult point in the research of particle recombination, which leads to the material being easily corroded at the interface.

Method used

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  • Preparation method of in-situ nanoparticle and rare earth coupling reinforced aluminum-based composite material
  • Preparation method of in-situ nanoparticle and rare earth coupling reinforced aluminum-based composite material
  • Preparation method of in-situ nanoparticle and rare earth coupling reinforced aluminum-based composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027](1) Aluminum alloy casting: Melt 1Kg of aluminum alloy raw material at 790°C and keep it warm for 10 minutes, then raise the temperature of the melt to 850°C, and add the dried reaction powder wrapped in high-purity aluminum foil in batches The body (particle size is less than 100μm, the quality of potassium fluozirconate is 74g, and potassium fluoborate is 80g) enters the melt, and the combination device of low-frequency magnetic field and high-energy ultrasonic field is turned on at the same time (magnetic field: frequency 10Hz, magnetic current 100A; ultrasonic: power 900W, frequency 20kHz) for 30min, after the reaction, remove the scum on the surface of the melt and spray hexachloroethane into the solution for refining, and pour it into a copper mold to obtain 3wt.%ZrB 2 Aluminum matrix composite cast rod.

[0028] (2) Homogenization treatment: the cast rod obtained in step 1 is subjected to head and tail milling to obtain a cast rod with a length of 200 mm. Then pu...

Embodiment 2

[0032] The preparation method is basically the same as in Example 1, except that the reaction product is different, only 145g of Al-20wt.% RE master alloy is added at 750°C, and the reaction of the acoustic-magnetic coupling field is applied for 30 minutes to obtain 0.2wt.% RE material cast rod.

Embodiment 3

[0034] The preparation method is basically the same as that in Example 1, the difference being that the reactant quality is different, not only adding the dried reaction powder wrapped with high-purity aluminum foil (particle size less than 100 μm, potassium fluorozirconate The quality is 74g, potassium fluoroborate is 80g), and the acoustic-magnetic coupling field is applied to react for 30 minutes. After the reaction, the scum on the surface of the melt is removed and hexachloroethane is sprayed into the solution for refining, and then the temperature is lowered to 750°C. Add 145g of Al-10wt.% RE master alloy, apply acousto-magnetic coupling field reaction for 30min to prepare (3wt.%ZrB 2 +0.2wt.% RE) aluminum matrix composite cast rod.

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Abstract

The invention relates to an in-situ nanoparticle and rare earth coupling reinforced aluminum-based composite material and a preparation method thereof, through an in-situ synthesis technology, mixed powder of potassium fluozirconate and potassium fluoborate is used as a reactant, and scandium-rich mixed rare earth is added. And applying an acoustic-magnetic coupling field in the reaction process to obtain the uniformly distributed composite material of the nano reinforced phase clusters and the fine grain tissues. Then through an optimized hot extrusion technology and a three-stage aging treatment technology, the defects of the material are reduced, dynamic recrystallization of sub-crystals in the material is promoted, fine recrystallized crystal grains are obtained, the strength, plasticity, impact resistance and corrosion resistance of the material are improved, and the comprehensive performance of the material is improved to the maximum extent; and the qualified aluminum-based composite material profile for the rail train body is obtained.

Description

technical field [0001] The invention relates to an aluminum-based composite material, and specifically designs a preparation method for in-situ nano particles and mixed rare earth reinforced aluminum alloys for lightweight rail train bodies. Background technique [0002] Lightweight rail transit equipment is the only way to upgrade modern high-speed trains, and weight reduction has important practical significance for vehicle speed increase, noise reduction, and energy saving. Aluminum alloys and magnesium alloys are the first metal structural materials used for lightweight transportation equipment, especially aluminum alloys. At present, high-speed train bodies in various countries have basically adopted aluminum alloy frames. In addition, many parts such as the roof of the car body and the gearbox case have also been made of aluminum. For rail vehicles, the weight of the car body structure accounts for about 15% to 30% of the weight of the whole vehicle. Therefore, the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/10C22C1/03C22C21/10C22C32/00C22F1/053
Inventor 赵玉涛石安君怯喜周陶然
Owner JIANGSU UNIV
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