Preparation method for industrial large-size foamed aluminum sandwich panel

A foamed aluminum, large-size technology, applied in the field of layered composite material preparation, can solve the problems of difficulty, unfavorable production control of foaming time, low interface bonding strength, etc., and meet the requirements of reducing heating rate, high stability and High repeatability and high controllability of temperature accuracy

Active Publication Date: 2018-10-26
NORTHEASTERN UNIV
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  • Description
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  • Application Information

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Problems solved by technology

[0003] The main composite forms of the existing aluminum foam sandwich panel core layer and face plate are adhesive connection and metallurgical compounding; Although the operation is simple and economical, there are some obvious shortcomings, including its low interface bonding strength, easy aging and high temperature resistance, and the toxicity of the adhesive layer when it decomposes, which greatly limits its application field; therefore, the panel and The core layer adopts the method of metallurgical bonding, which has become the main development direction at present.
[0004] In order to achieve the metallurgical combination of the core layer and the panel, the researchers have continuously explored the production process; for example, in the patent CN104960270A, the aluminum foam sheet with appropriate density, porosity and thickness obtained by the melt foaming method is surface-treated, Place in parallel on a heating platform with a certain temperature. When the side contacting the heating platform reaches a certain temperature, press the other side to deform the heating side, and finally produce a skin layer similar to the panel, and then repeat the above for the other end operation to finally obtain a sandwich structure; although this method finally produces a foamed aluminum sandwich structure, the disadvantage is that the strength and surface quality of the obtained panel layer are poor, and it is easy to cause damage to the foamed aluminum structure during the compression process
[0005] In the invention patent CN106735245A, a method for preparing aluminum foam sandwich panels completely by powder metallurgy is disclosed, which is characterized in that the upper and lower panels also adopt the technical route of powder molding, according to the arrangement of panel powder-core layer powder-panel powder The method is evenly tiled, and the preform is formed by pressing with a press, and then heated and foamed to form a sandwich-like aluminum foam sandwich structure; although this method achieves a metallurgical bond between the face plate and the core layer powder, it is relatively difficult to operate , limited by equipment such as molds, it cannot be applied to the preparation of large-scale sandwich panels, and it is difficult

Method used

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  • Preparation method for industrial large-size foamed aluminum sandwich panel
  • Preparation method for industrial large-size foamed aluminum sandwich panel
  • Preparation method for industrial large-size foamed aluminum sandwich panel

Examples

Experimental program
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Effect test

Embodiment 1

[0050] Mix aluminum powder, silicon powder, copper powder, magnesium powder, zinc white copper powder and foaming agent, add additives, and mix evenly to obtain a core layer mixed powder. The mixing time is 1h; the element composition of the core layer mixed powder is Si in mass percentage 5%; Mg 8%, Cu1%, Zn 2%, foaming agent 0.5%, and the rest is Al; the foaming agent is titanium hydride powder; the additive is SiC particles, accounting for the total mass of the core mixed powder ≤8%; when the additive is carbon fiber, the additive accounts for ≤0.5% of the total mass of the core mixed powder; the particle size of aluminum powder, silicon powder and magnesium powder is 100-400 mesh; the particle size of copper powder, zinc white copper powder and titanium hydride powder 400-1000 mesh; the particle size of silicon carbide particles is 50-200 mesh;

[0051] use The 3003 aluminum alloy tube aluminum alloy is used as the tube; the tube is annealed at 400±10°C for 1 hour, then ...

Embodiment 2

[0062] Method is with embodiment 1, and difference is:

[0063] (1) Mix aluminum powder, silicon powder, copper powder, magnesium powder and foaming agent, add additives, and mix evenly to obtain a core layer mixed powder. The mixing time is 2h; the element composition of the core layer mixed powder is Si 10 by mass percentage %; Mg 1%, Cu 6%, foaming agent 2%, and the rest is Al; the additive is carbon fiber; accounting for 0.5% of the total mass of the core mixed powder; carbon fiber diameter ≤ 100um, length ≤ 3mm;

[0064] (2) Use size The 6063 aluminum alloy pipe is used as the pipe; the pipe is annealed at 400±10°C for 3 hours, then flattened with a press, and then rolled into a tubular cavity with a rolling mill; the tubular cavity consists of an upper plate, a lower plate and The connection between the two is formed, the distance between the upper plate and the lower plate is 30mm; the width of the tubular cavity is 210±10mm, and the wall thickness is 4mm;

[0065] (...

Embodiment 3

[0073] Method is with embodiment 1, and difference is:

[0074] (1) Mix aluminum powder, silicon powder, copper powder, magnesium powder, zinc white copper powder and foaming agent without adding additives, and mix evenly to obtain the core layer mixed powder. The mixing time is 3 hours; the element composition of the core layer mixed powder is as follows: The mass percentage is Si 8%; Mg 4%, Cu 3%, Zn 1%, foaming agent 1%, and the rest is Al;

[0075] (2) 6061 aluminum alloy plate is used as the plate; the two sides of the two parallel plates are sealed to form a tubular cavity; the tubular cavity is composed of an upper plate, a lower plate and a connection between the two The upper plate and the lower plate are parallel to each other with a distance of 25mm; the width of the tubular cavity is 500mm and the wall thickness is 4mm; the method of sealing the two sides is: the two sides of the upper plate and the lower plate Bending respectively, the angle between the bending p...

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Abstract

The invention discloses a preparation method for an industrial large-size foamed aluminum sandwich panel. The preparation method comprises the following steps that (1), aluminum powder/aluminum alloypowder, silicon powder, copper powder, magnesium powder, zinc-copper-nickel alloy powder and a foaming agent are mixed to obtain core mixed powder; (2), aluminum alloy pipes or plates are adopted, andthe pipes are flattened after being annealed and then rolled into a pipe-shaped cavity, or the sides of the two plates are sealed to form a pipe-shaped cavity; (3), the inner surface is pretreated; (4), the front end is sealed and then filled with the core mixed powder, and the tail end is sealed; (5), cold rolling is conducted; (6), sintering is conducted; (7), hot rolling is conducted; (8), edge cutting is conducted after heat treatment; and (9), air cooling is conducted after foaming treatment. According to the preparation method, low-temperature foaming is achieved, oversintering is avoided, and the physical properties of the panel are well kept.

Description

technical field [0001] The invention relates to the preparation of a layered composite material, in particular to a method for preparing an industrial large-size aluminum foam sandwich panel. Background technique [0002] As a new porous composite material, aluminum foam sandwich panel has many unique physical properties compared with traditional metal materials, such as light weight, high specific stiffness and specific strength, better energy absorption, noise reduction and electromagnetic Shielding properties, etc.; after special design and assembly, the material can be used as a material integrating structure and function, whether it is lightweight design in the aerospace and transportation fields, or applied to urban construction and engine partitions Such sound-absorbing structures, as well as the use of its energy-absorbing properties in vehicle anti-collision beams and armored vehicle chassis, have high application value and development prospects; in recent years, fo...

Claims

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Application Information

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IPC IPC(8): B22F3/11B22F7/08
CPCB22F3/1125B22F3/1134B22F7/006B22F3/11B22F3/18B22F7/04C22C1/08
Inventor 祖国胤孙溪黄鹏李志刚王兆可方冬雨曾前进韩楠丁
Owner NORTHEASTERN UNIV
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