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A kind of preparation method of aluminum clad magnesium composite plate

A composite plate, aluminum-coated magnesium technology, applied in the field of material processing engineering, can solve the problems of interface reaction layer thickness, interface bonding strength is not high, uneven, etc., to achieve less defects such as cracks and holes, good interface bonding, and enhanced cooling The effect of intensity

Inactive Publication Date: 2016-08-17
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The content of the present invention is to overcome the deficiencies of the prior art, and prepare the aluminum-magnesium composite casting slab with the solid-liquid composite method, aiming to solve the complex process and poor repeatability of the existing process for preparing the aluminum-magnesium composite ingot, and the shape and size of the product are affected. Limitation, thick and uneven interface reaction layer, many defects such as cracks and holes, low interface bonding strength, etc.

Method used

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  • A kind of preparation method of aluminum clad magnesium composite plate
  • A kind of preparation method of aluminum clad magnesium composite plate
  • A kind of preparation method of aluminum clad magnesium composite plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Aluminum alloy grade and composition:

[0031] 1050 aluminum alloy, its mass fraction: contains Fe 0.16%, Si 0.07%, Cu 0.01%, Mn 0.01%, Mg 0.01%, Zn 0.02%, Ti 0.17%, and the rest is Al.

[0032] Magnesium alloy grade and composition:

[0033] AZ31 magnesium alloy ingot, its mass fraction: containing Al 3.06%, Zn 1.18%, Mn 0.47%, Si 0.016%, Cu≤0.002%, Fe≤0.002%, Ni≤0.0001%, and the rest is Mg.

[0034] Specific steps:

[0035] (1) Machining the magnesium alloy ingot to a predetermined size, the specification is 50mm×50mm×18mm.

[0036] (2) Grind the magnesium alloy block with 600#, 800#, 1000#, and 1200# sandpaper in sequence to make all surfaces of the prefabricated aluminum plate smooth; chemical cleaning is to use 5% NaOH solution, deionized water, and 5% oxalic acid in sequence Magnesium alloy blocks were cleaned with solution, deionized water and absolute ethanol to remove surface oil and oxides, and then placed in an air furnace for preheating at 200 °C.

[003...

Embodiment 2

[0044] Aluminum alloy grade and composition:

[0045] 1050 aluminum alloy, its mass fraction: contains Fe 0.16%, Si 0.07%, Cu 0.01%, Mn 0.01%, Mg 0.01%, Zn 0.02%, Ti 0.17%, and the rest is Al.

[0046] Magnesium alloy grade and composition:

[0047] AZ31 magnesium alloy ingot, its mass fraction: containing Al 3.06%, Zn 1.18%, Mn 0.47%, Si 0.016%, Cu≤0.002%, Fe≤0.002%, Ni≤0.0001%, and the rest is Mg.

[0048] Specific steps:

[0049] (1) Machining the magnesium alloy ingot to the predetermined size, the specification is 50mm×50mm×22mm.

[0050] (2) In order to grind the magnesium alloy block with 600#, 800#, 1000#, and 1200# sandpaper in sequence, so that all surfaces of the prefabricated aluminum plate are smooth; chemical cleaning is to use 5% NaOH solution, deionized water, 5% The magnesium alloy blocks were cleaned with oxalic acid solution, deionized water and absolute ethanol to remove surface oil and oxides, and then placed in an air furnace for preheating at 150°C. ...

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Abstract

The invention discloses a preparation method of an aluminum-coated magnesium composite plate material, belonging to the field of material processing engineering. The preparation method comprises the following steps: after removing greasy dirt and oxides on the surface of a magnesium alloy pieceby mechanically processing and chemically cleaning the magnesium alloy piece with a preset dimension, placing the magnesium alloy piece into an air furnace for carrying out pre-heating treatment; pre-heating a casting mould and an aluminum alloy bottom pad for 50 minutes at 450 DEG C-650 DEG C; taking out the pre-heated mould, placing a pre-heated magnesium alloy block in the mould, uniformly pouring aluminum alloy melt with a pouring temperature controlled at 720 DEG C-760 DEG C to the periphery of the magnesium alloy block until molten aluminum just covers the magnesium block; quickly quenching the whole casting mould into room-temperature water for cooling; and after heating the prepared blank material to 350 DEG C-430 DEG C and preserving the heat for 0.5 hour-15 hours, hot-rolling to required thickness. The preparation method disclosed by the invention can prepare aluminum-magnesium composite casting blanks with different coating ratios according to needs; casting blank interfaces are combined in a metallurgical manner, reaction combining layers are thin, and the good composite plate material is obtained by hot-rolling deformation.

Description

technical field [0001] The invention relates to a method for preparing an aluminum-clad magnesium composite slab, and belongs to the technical field of material processing engineering. Background technique [0002] Magnesium alloy has a series of advantages such as low density, high specific strength, easy machining, good shock absorption performance, good electromagnetic shielding and radiation resistance, good casting performance, etc., but due to its insufficient corrosion resistance and room temperature deformation ability the scope of its use. Therefore, by coating a layer of aluminum alloy with corrosion resistance and excellent deformability on the surface of magnesium alloy, an aluminum-clad magnesium alloy clad material with the advantages of both aluminum alloy and magnesium alloy can be obtained. At present, the preparation of aluminum / magnesium clad materials mainly relies on processes such as rolling cladding, casting cladding, extrusion cladding, diffusion bon...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D19/16B22D27/04
Inventor 张济山李宏祥刘君城胡江庄林忠
Owner UNIV OF SCI & TECH BEIJING
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