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An aluminum matrix composite material with high boron carbide content

A technology of aluminum-based composite materials and high boron carbide, which is applied in the field of preparation of aluminum-based composite materials with high boron carbide content by loose-packed powder frame peeling hot rolling method, can solve the problems of inability to prepare homogeneous materials, and achieve equipment The effect of low requirements, high density and stable performance

Active Publication Date: 2016-04-20
镇江华核装备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the Chinese patent with application number 201010602530.5 describes "a method for preparing a high-density neutron absorbing plate". The method is to roll the mixed powder in an aluminum alloy box. During the rolling process, the mixed powder is gradually dense And achieve metallurgical bonding with the aluminum alloy shell to form a sandwich biscuit-like metallurgically bonded material. There is no process of removing the aluminum alloy shell during the rolling process, so it is impossible to prepare B4C uniformly dispersed in the aluminum alloy matrix. homogeneous material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Step 1 Mixing: 80 parts of Al alloy powder with a particle size of 10 μm, 70 parts of boron carbide powder with a particle size of 50 μm, 10 parts of ceramic micropowder, 15 parts of hollow glass microspheres, 10 parts of shrimp shellin, 5 parts of sericite particles, and bentonite 15 parts are mixed evenly in the mixer;

[0019] Step 2 Loading: Put the mixed powder into an aluminum alloy box with an aluminum alloy frame for packaging;

[0020] Step 3 Vacuum degassing sintering: Put the aluminum alloy box with the mixed powder blank in a vacuum of 10 -3 Vacuum degassing and sintering in a Pa vacuum furnace; the sintering temperature is 510°C, and the sintering time is 10 hours;

[0021] Step 4 Hot rolling and peeling: The sintered aluminum alloy box is continuously hot-rolled at 350°C for multiple passes, the reduction is 10% per pass, and when the density of the billet is 70% TD, the direction is changed to 90 Rolling, and removing the aluminum alloy cladding on the ...

Embodiment 2

[0025] Step 1 Mixing: 80 parts of Al alloy powder with a particle size of 15 μm, 75 parts of boron carbide powder with a particle size of 60 μm, 20 parts of ceramic micropowder, 20 parts of hollow glass microspheres, 15 parts of shrimp shellin, 10 parts of sericite particles, bentonite 25 parts are mixed evenly in the mixer;

[0026] Step 2 charging: with embodiment 1;

[0027] Step 3 Vacuum degassing sintering: Put the aluminum alloy box with the mixed powder blank in a vacuum of 10 -3 Vacuum degassing and sintering in a Pa vacuum furnace; the sintering temperature is 540°C, and the sintering time is 6 hours;

[0028] Step 4 Hot rolling and peeling: The sintered aluminum alloy box is subjected to continuous multi-pass hot rolling at 450°C, with a reduction of 10% per pass, and when the density of the billet is 85% TD, the direction is changed to 90° Rolling, and removing the aluminum alloy cladding on the outer layer of the billet, and then performing multi-pass hot rolling...

Embodiment 3

[0032] Step 1 Mixing: 95 parts of Al alloy powder with a particle size of 25 μm, 75 parts of boron carbide powder with a particle size of 60 μm, 20 parts of ceramic micropowder, 20 parts of hollow glass microspheres, 15 parts of shrimp shellin, 10 parts of sericite particles, bentonite 25 parts are mixed evenly in the mixer;

[0033] Step 2 charging: with embodiment 1;

[0034] Step 3 Vacuum degassing sintering: Put the aluminum alloy box packaged with the mixed powder blank in a vacuum furnace with a vacuum degree of 10-3Pa for vacuum degassing sintering; the sintering temperature is 480°C, and the sintering time is 15 hours;

[0035] Step 4 Hot rolling and peeling: The sintered aluminum alloy box is continuously hot-rolled at 540 °C for multiple passes, and the reduction is 10% per pass. When the density of the billet is 90% TD, the outer layer of the billet is removed. For the aluminum alloy cladding, when the density of the billet is 95%TD, the rolling is reversed at 90°,...

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Abstract

The invention discloses an aluminum matrix composite material high in boron carbide content. The aluminum matrix composite material high in boron carbide content is prepared from Al alloy powder, boron carbide powder, ceramic micro powder, hollow glass beads, chitin, sericite particles and bentonite. The aluminum matrix composite material has the advantages that compared with the prior art, large presses or extruding machines are not needed in the preparing process of the material, the technology is relatively simple, the requirement for equipment is low, the prepared B4C-Al neutron absorption material is a homogeneous material and is high in density and stable in using performance, the material density is larger than 98 percent, the material can be used as a neutron absorption material for critical safety control in a spent fuel storage facility, and dense storage of flammable fuel is achieved.

Description

technical field [0001] The invention belongs to a method for preparing a composite material, in particular to a method for preparing an aluminum-based composite material with high boron carbide content by a loose powder frame peeling hot rolling method. Background technique [0002] The boron carbide aluminum metal matrix composite material plate is composed of boron carbide uniformly dispersed in the aluminum alloy matrix, wherein the boron carbide is the dispersion strengthening phase, and the aluminum alloy is the matrix phase. This material contains B element with good neutron absorbing properties and can be used as a neutron absorbing material. Its notable advantages are corrosion resistance, radiation resistance, high boron content, long service life, and can improve the economy and safety of spent fuel storage and transportation. [0003] Aluminum-based composite materials with high boron carbide content are prepared in foreign countries by various methods such as me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C32/00
Inventor 张中武
Owner 镇江华核装备有限公司
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