Aluminum-magnesium layered composite material added with middle layer and preparation method of aluminum-magnesium layered composite material

A layered composite material and composite material technology, which is applied in the field of aluminum-magnesium layered composite materials with Ni interlayer and its preparation, can solve the problem that the interfacial bonding strength of aluminum-magnesium composite materials needs to be improved, and there are few researches on powder metallurgy aluminum-magnesium composite materials , affecting interface bonding performance and other issues, to achieve the effect of increasing shear strength, reducing production costs and improving shear strength

Pending Publication Date: 2022-07-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the problem that these methods have when compounding Al / Mg materials is that Al / Mg brittle intermetallic compounds are easily formed at the composite interface, which affects the interface bonding performance. Composite interface prevents the generation of brittle phases and improves interface bonding performance
In summary, the interfacial bonding strength of aluminum-magnesium composites prepared by various methods still needs to be improved, and the research on powder metallurgy aluminum-magnesium composites is less and incomplete.

Method used

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  • Aluminum-magnesium layered composite material added with middle layer and preparation method of aluminum-magnesium layered composite material
  • Aluminum-magnesium layered composite material added with middle layer and preparation method of aluminum-magnesium layered composite material
  • Aluminum-magnesium layered composite material added with middle layer and preparation method of aluminum-magnesium layered composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Press 2A12 aluminum alloy powder and AZ31 magnesium alloy powder into a circular green body with a diameter of 40 mm under a pressure of 200 MPa, respectively; the particle size distribution of the aluminum alloy powder used is 5-100 microns, and the average particle size is 29.5 microns; The particle size distribution of the magnesium alloy powder used is 30-100 microns, and the average particle size is 68.6 microns;

[0050] (2) After using 1500# and 2000# water-grinding paper to surface-treat the pure Ni foil with a thickness of about 10 microns, clean it in an ultrasonic cleaner for 10 minutes, and take it out for drying; the thickness of the Ni foil is about 9 microns at this time;

[0051] (3) the dried Ni foil is placed between the aluminum-magnesium green bodies, and is put into the graphite mold;

[0052] (4) Put the graphite mold with the sample into the vacuum sintering furnace, and evacuate to 2*10 -2 After Pa, the heating was started, firstly, the temp...

Embodiment 2

[0054] Example 2 (using 20μm thick Ni-Cr-Fe alloy):

[0055] Other conditions are the same as in Example 1, except that a 20 μm thick Ni-Cr-Fe alloy foil is used.

[0056] The obtained aluminum-magnesium matrix is ​​basically sintered and dense, and the tensile strength is about 205MPa, which reaches the normal level of aluminum-magnesium composite materials. The interface produces a certain amount of second phase structure, which affects the overall bonding strength of the interface. The shear strength of the material is slightly lower than that of the aluminum-magnesium composite material with pure Ni foil, which is about 55MPa.

Embodiment 3

[0058] Other conditions are the same as in Example 1, except that the aluminum alloy powder used is 7055Al alloy; the tensile strength of the obtained product is about 230MPa; the average shear strength of the product is about 57MPa.

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Abstract

The invention relates to a powder metallurgy preparation technology, in particular to an aluminum-magnesium layered composite material added with a Ni middle layer and a preparation method of the aluminum-magnesium layered composite material. The composite material is formed by compounding an aluminum alloy layer, a middle layer and a magnesium alloy layer, and metallurgical bonding is formed among the contacted layers. The preparation method comprises the following steps: selecting proper aluminum alloy powder, magnesium alloy powder and the middle layer; and the aluminum-magnesium layered composite material which is light in weight, high in strength and good in interface bonding is obtained through low-pressure co-sintering. The prepared aluminum / middle layer / magnesium composite material has the advantages of being light in weight, high in strength, good in interface bonding, excellent in comprehensive mechanical property and the like. And the technological process of preparing the aluminum-magnesium composite material through a powder metallurgy method is simplified, the bonding strength of the interface is improved, operation is easy, control is easy, and industrial production is facilitated.

Description

technical field [0001] The invention relates to powder metallurgy preparation technology, in particular to an aluminum-magnesium layered composite material with Ni intermediate layer added and a preparation method thereof. Background technique: [0002] Aluminum alloys and magnesium alloys have the characteristics of low density, high specific strength, and excellent comprehensive properties. They are widely used lightweight structural materials in aerospace, automobile manufacturing and other fields. However, with the rapid development of various fields, higher requirements have been placed on the properties of aluminum-magnesium alloys. Therefore, aluminum-magnesium alloys are composited to form lightweight aluminum-magnesium composite materials. A single homogeneous material has broader application prospects. [0003] At present, the commonly used methods for preparing Al / Mg composite materials at home and abroad include diffusion joining method, rolling composite method...

Claims

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Application Information

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IPC IPC(8): B22F3/02B22F3/10B22F7/02
CPCB22F7/02B22F3/02B22F3/10B22F3/1007
Inventor 马运柱唐昭峰杨伦王涛伍镭刘文胜刘超颜焕元
Owner CENT SOUTH UNIV
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