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Multi-layer composite board and preparation method thereof

A multi-layer composite and plate technology, applied in the field of composite materials, can solve the problems of poor corrosion resistance and low mechanical properties, and achieve the effects of improving comprehensive mechanical properties, reducing surface oxidation, and increasing effective contact area.

Pending Publication Date: 2021-12-31
CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the present invention discloses a method for compounding two heterogeneous metals of magnesium and aluminum, which successfully prepares an aluminum / magnesium / aluminum multilayer composite plate with excellent bonding performance and mechanical properties, and solves the problem of a single component of a magnesium alloy plate. The board has low mechanical properties, poor corrosion resistance and insufficient surface coloring ability; at the same time, compared with the double-layer composite board, the multi-layer composite board can completely distribute the aluminum alloy layer with better comprehensive performance on the outside, and the use scene is better than the double-layer magnesium / Aluminum sheet has a wider range of applications

Method used

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  • Multi-layer composite board and preparation method thereof

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Effect test

Embodiment 1

[0031] S1. Material preparation: Prepare two 5052 aluminum alloy and AZ31B magnesium alloy cast rods with a diameter of 300mm and a length of 405mm, and process them to a diameter of 296mm and a length of 400mm; figure 1 For the S-shaped section shown, the distance d between the apex of the convex and concave tangent arcs and the line connecting the two ends is 40mm;

[0032] S2. Surface cleaning: polish the surface of the prepared magnesium alloy and aluminum alloy with sandpaper, remove the surface oxide black skin and wire cutting marks, after all the surface is polished, clean it with tap water, rinse off the surface grinding powder, and then air dry;

[0033] S3. Assembly combination: Combine the cleaned magnesium alloy and aluminum alloy according to the shape of the cylinder to make the layers closely fit, then hit the joint with a hammer to deform the joint and have a certain joint Force, so that the layers are not easy to fall off;

[0034]S4. Place the combined comp...

Embodiment 2

[0037] S1. Material preparation: Prepare two 6061 aluminum alloy and AZ40M magnesium alloy cast rods with a diameter of 300mm and a length of 405mm, and process them to a diameter of 296mm and a length of 400mm; figure 1 For the S-shaped section shown, the distance d between the apex of the convex and concave tangent arcs and the line connecting the two ends is 40mm;

[0038] S2. Surface cleaning: polish the surface of the prepared magnesium alloy and aluminum alloy with sandpaper, remove the surface oxide black skin and wire cutting marks, after all the surface is polished, clean with alcohol, rinse off the surface grinding powder, and then air dry;

[0039] S3. Assembly combination: Combine the cleaned magnesium alloy and aluminum alloy according to the shape of the cylinder to make the layers closely fit, then hit the joint with a hammer to deform the joint and have a certain joint Force, so that the layers are not easy to fall off;

[0040] S4. Place the assembled composi...

Embodiment 3

[0043] S1. Material preparation: Prepare two 5052 aluminum alloy and AZ40M magnesium alloy cast rods with a diameter of 300mm and a length of 405mm, and turn them to a diameter of 296mm and a length of 400mm; figure 1 For the S-shaped section shown, the distance d between the apex of the convex and concave tangent arcs and the line connecting the two ends is 40mm;

[0044] S2, surface cleaning: the aluminum alloy layer is NaHCO with a pH of 10 3 The solution is alkali washed, the magnesium alloy layer is pickled with a phosphoric acid solution with a pH of 6, and then the surface is rinsed with an alcohol solution, and then air-dried;

[0045] S3. Assembly combination: Combine the cleaned magnesium alloy and aluminum alloy according to the shape of the cylinder to make the layers closely fit, and then pressurize with a hydraulic press, with a reduction of 1mm, and deformation occurs at the joint. There is a certain binding force, so that the layers are not easy to fall off; ...

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Abstract

The invention relates to the technical field of composite materials, in particular to a preparation method of a multi-layer composite board. The preparation method of the multi-layer composite board comprises the following steps: preparation of materials: machining aluminum alloy and magnesium alloy materials to be in the needed shape and size, wherein the sections of the two layers of aluminum alloy on the outer side of the materials are S-shaped cambered surfaces, the magnesium alloy layer is arranged in the middle, and the three layers of aluminum alloy can be combined into a cylinder; surface cleaning: polishing and cleaning the aluminum alloy and magnesium alloy materials prepared in the step S1, so that the surfaces of the alloy materials are clean; assembling and combining: assembling and combining the alloy materials cleaned in the step S3, and fixing the alloy materials into a cylinder in a mechanical occlusion manner; and extrusion forming: preheating the assembled magnesium-aluminum composite blank, then carrying out extrusion forming, and obtaining the magnesium-aluminum composite board. The composite board prepared by the method is high in alloy interface bonding strength and has excellent comprehensive mechanical properties.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a method for preparing a multilayer composite plate. Background technique [0002] Magnesium and its alloys have the advantages of high specific strength and stiffness, good thermal conductivity, excellent electromagnetic shielding and damping performance, and easy machining. They are the lightest metal structural materials in practical applications, and their density is only 2 / that of aluminum alloys. 3. 1 / 4 of steel is an ideal lightweight structural material. This remarkable low-density feature makes it have a very broad market in the fields of aerospace, automobiles, rail transportation and 3C. [0003] Although magnesium alloy has a significant light weight advantage, the electrode potential of pure magnesium is low, the oxide film on the surface is loose and porous, resulting in poor corrosion resistance, and compared with other metals, the absolute strength of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/01B32B15/20B32B15/00B32B38/00B32B38/16B32B37/06B32B37/10B32B3/28C23G1/22C23G1/12
CPCB32B15/01B32B15/20B32B15/00B32B38/0004B32B38/00B32B38/162B32B38/0012B32B37/06B32B37/10B32B3/28C23G1/22C23G1/12B32B2038/0064
Inventor 康心锴张涛曾钢黄硕刘海平
Owner CHANGSHA ADVANCED MATERIALS IND RES INST CO LTD
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