A kind of high-strength and high-toughness closed-cell aluminum foam and its preparation method

A closed-cell aluminum foam, high-strength and high-toughness technology, applied in the field of high-strength and high-toughness closed-cell aluminum foam and its preparation, can solve the problems of plasticity and toughness of composite materials, and achieve good cell integrity, uniform cell structure, high The effect of resilience energy absorption

Active Publication Date: 2017-10-27
有研金属复材技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the particle size is small to a certain size, the plasticity and toughness of the composite material decrease rapidly

Method used

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  • A kind of high-strength and high-toughness closed-cell aluminum foam and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The composition of the aluminum foam prepared in this embodiment is 5vol% SiO 2 / Al. The matrix is ​​pure aluminum powder, and the average particle size of pure aluminum powder is 60-70 μm; the reinforcing particles are silicon oxide particles, and the particle volume percentage is 5% (converted to 4.1% by mass), and the average particle size of the reinforcing particles is is 1 μm. The mass percent content of the foaming agent titanium hydride is 0.5%, and the average particle size is 20-40 μm. Weigh 1918g of pure aluminum powder, 82g of silicon oxide powder and 10g of titanium hydride powder, put all the powders into a mixer and mix for 24h. The obtained mixed powder was put into a mold with a diameter of 100m and cold-pressed to form a rough billet. The cold pressing pressure was 100 MPa, and the pressure was maintained for 15 minutes. The relative density of the rough billet was 85%. Put the rough blank into the aluminum sheath, put the aluminum sheath into the d...

Embodiment 2

[0037] The composition of the aluminum foam prepared in this embodiment is 10vol% AlN / 6061Al. The matrix is ​​6061 aluminum alloy, and the average particle size of the powder is 60-70 μm. The reinforcing particles are aluminum nitride particles, the volume percentage of the particles is 10% (converted to 11.8% by mass), and the average particle size of the reinforcing particles is 4 μm. The mass percent content of the foaming agent titanium hydride is 0.5%, and the average particle size is 20-40 μm. Weigh 1763g of 6061 aluminum alloy powder, 237g of aluminum nitride powder and 10g of titanium hydride powder, put all the powders into a mixer and mix for 24 hours. The obtained mixed powder was put into a mold with a diameter of 100m and cold-pressed to form a rough billet. The cold pressing pressure was 100 MPa, and the pressure was maintained for 15 minutes. The relative density of the rough billet was 82%. Put the rough blank into the aluminum sheath, put the aluminum sheath...

Embodiment 3

[0039] The composition of the aluminum foam prepared in this embodiment is 25vol%Al 2 o 3 / 4047Al. The matrix is ​​4047Al alloy, and the average particle size of the powder is 60-70 μm. The reinforcing particles are alumina particles, the volume percentage of the particles is 25% (converted to 32.4% by mass), and the average particle size of the reinforcing particles is 20 μm. The mass percent content of the foaming agent titanium hydride is 0.2%, and the average particle size is 20-40 μm. Weigh 1351g of 4047Al alloy powder, 649g of alumina powder and 4g of titanium hydride powder, put all the powders into a mixer and mix for 24 hours. The obtained mixed powder was put into a mold with a diameter of 100m and cold-pressed to form a rough billet. The cold pressing pressure was 150 MPa, and the pressure was maintained for 15 minutes. The relative density of the rough billet was 78%. Put the rough blank into the aluminum sheath, put the aluminum sheath into the degassing furna...

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Abstract

The invention relates to high-strength and high-toughness foam aluminum and a preparation method thereof. The density of the foam aluminum is 0.4-1 g / cm3; the average size of foam holes is 2-5 mm; the hole walls consist of aluminum basal bodies and reinforcing particles dispersed therein; and the reinforcing particles and the aluminum basal bodies form high-strength-bonded metallurgy interfaces. Firstly, aluminum basal body powder, the reinforcing particles and foaming agent particles are uniformly mixed and coldly pressed to prepare a rough blank; and the rough blank is thermally deformed to prepare a foamable prefabricated body after vacuum heat degassing, and is heated and foamed to prepare the foam aluminum. The product has the characteristics of high strength, high toughness and high energy absorption, and can be applied to light support structural parts or high-damping vibration reduction and energy absorption parts in the fields of vehicles, rail traffic and spaceflight war industry; and the preparation method is flexible, strong in designability, nearly suitable for preparation of all alloy system foam aluminum, can randomly add matched reinforcing particles according to the alloy performance, and can be used for customizing the foam aluminum with different mechanical performances to satisfy the demands in all fields.

Description

technical field [0001] The invention belongs to the technical field of foamed aluminum and its preparation, in particular to a high-strength and high-toughness closed-cell foamed aluminum and a preparation method thereof. Background technique [0002] Aluminum foam is a kind of porous metal material developed in the past 30 years. Aluminum foam is formed by introducing a certain amount of regular pores into traditional aluminum materials. It is a new structural form of traditional materials. Due to the ingenious integration of materials and structures in aluminum foam, it exhibits unique and attractive performance characteristics, such as ultra-low specific gravity, high specific stiffness, excellent energy absorption characteristics, high damping characteristics and controllable heat transfer performance, exhibiting good multifunctional response characteristics. This new form of material can not only meet the major demand for lightweight automotive materials, but also meet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/08C22C21/00
CPCC22C1/08C22C21/00
Inventor 刘彦强樊建中马自力魏少华刘铭坤聂俊辉郝心想
Owner 有研金属复材技术有限公司
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