Preparation method of nano-phase reinforced aluminum-based composite board

An aluminum-based composite material and an aluminum-based composite technology are applied in metal rolling and metal processing equipment, etc., which can solve the problems of high requirements for rolling equipment, limited sample size, and low content of reinforcement phase, so as to ensure the yield, Achieve effective dispersion, high strength effect

Active Publication Date: 2020-07-28
SHANGHAI JIAO TONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of nano-phase reinforced composite materials by accumulative stack rolling has low reinforcement phase content, severely limited sample size, and very high requirements for rolling equipment, which is not conducive to popularization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The invention discloses a preparation method of a nano-phase strengthened aluminum-based composite plate, specifically a 5mm plate of a nano-SiC ceramic phase-strengthened 2024Al composite material. The reinforcing phase is a SiC nano-ceramic phase, the addition amount is 12% by mass, and the raw metal powder is 2024Al spherical powder.

[0032] After mixing the 2024Al alloy powder and 12wt% SiC nano-ceramics, use a planetary ball mill at a speed of 100 rpm for 24 hours to obtain a composite flake powder with an average thickness of 1200nm and a diameter-to-thickness ratio of about 60;

[0033] The obtained composite flake powder is vacuum hot pressed to obtain a flake powder metallurgy ingot with a density of 99.6%;

[0034]The flake powder metallurgy ingot obtained is then asynchronously rolled using a twin-roll mill: the starting rolling temperature is 550°C, the finishing rolling temperature is greater than 360°C; the different speed ratio is 1.5, the pass reduction...

Embodiment 2

[0038] A preparation method of nano-phase strengthened aluminum-based composite plate, specifically nano-Al 2 o 3 , B 4 C ceramic phase composite strengthening 6061Al composite material 3mm plate. Reinforcing phase is Al 2 o 3 , B 4 The C nano-ceramic phase has a mass content of 8% and 12% respectively, the total mass ratio of the reinforcement phase is 20%, and the raw metal powder is 6061Al spherical powder.

[0039] After mixing 6061Al alloy powder with 8% and 12% Al2O3 and B4C nano-ceramic powders respectively by mass ratio, the planetary ball mill was used at a speed of 300 rpm for 5 hours to obtain a compound with an average thickness of 200nm and a diameter-thickness ratio of about 120. Flake powder;

[0040] The composite flake powder is sintered by vacuum hot pressing to obtain a flake powder metallurgy ingot with a density of 99.8%;

[0041] The flake powder metallurgy ingot obtained is then asynchronously rolled using a twin-roll mill: the starting rolling te...

Embodiment 3

[0045] A preparation method of nano-phase strengthened aluminum-based composite plate, specifically nano-Al 2 o 3 Reinforced 2024Al composite 5mm sheet. Reinforcing phase is Al 2 o 3 The nano-ceramic phase is added in an amount of 5% by mass, and the raw metal powder is 2024Al spherical powder.

[0046] 2024Al powder with 5wt% Al 2 o 3 After mixing the nano-ceramic powder, use a planetary ball mill to mill for 5 hours at a speed of 120 rpm to obtain a composite flake powder with an average thickness of 2000nm and a diameter-to-thickness ratio of about 25;

[0047] The composite flake powder is vacuum hot-pressed to obtain a flake powder metallurgy ingot with a density of 99.6%;

[0048] The flake powder metallurgy ingot obtained is then asynchronously rolled using a twin-roll mill: the starting rolling temperature is 480°C, the final rolling temperature is greater than 320°C; the different speed ratio is 1.5, the pass reduction is 20%, and the total reduction Volume 80%...

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Abstract

The invention provides a nano-phase reinforced aluminum-based composite board and a preparation method thereof, and belongs to the technical field of metal-based composite material preparation and processing. The method combines sheet powder metallurgy and asynchronous rolling, and comprises the following steps of: firstly, carrying out variable-speed ball milling to obtain sheet composite powderwith nano-phase dispersed distribution; then, carrying out powder metallurgy sintering to obtain a powder metallurgy ingot blank; and finally, adopting asynchronous rolling, and strictly controlling technological parameters such as the asynchronous rolling ratio and the pass reduction to obtain the nano-phase reinforced aluminum-based composite board. The aluminum-based composite board prepared bythe method has the advantages of being high in modulus, high in strength, good in plasticity and the like, the material preparation process is simple, the yield is high, and the preparation and production of the nano-phase reinforced aluminum-based composite board with the thickness of 1-5 mm can be met.

Description

technical field [0001] The invention relates to the field of metal-based composite materials, in particular to a preparation method of a nano-phase reinforced aluminum-based composite plate. Background technique [0002] Aluminum alloy is currently the most widely used lightweight metal structural material, and plate components are widely used in sheet metal, skin and other related fields. However, the low modulus of traditional aluminum alloys leads to poor stiffness of plate components. Especially in high-tech fields such as aerospace and national defense, lightweight plate structural materials with higher strength and stiffness are required. Adding nano-reinforced phases to the aluminum alloy matrix can not only improve the structural strength and stiffness of the plate, but also maintain high processing performance. Typical nano-ceramic reinforcement phases, such as silicon carbide SiC, boron carbide B4C, alumina Al2O3 and other nano-ceramics, as well as nano-carbon mat...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F3/10B22F3/15B22F3/16B21J5/00B21J5/08B21B1/22B21C37/02
CPCB22F9/04B22F3/10B22F3/15B22F3/16B21J5/002B21J5/08B21B1/22B21C37/02B22F2009/043
Inventor 袁超谭占秋王雷李志强范根莲
Owner SHANGHAI JIAO TONG UNIV
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