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Preparation method of casting aluminum-coated magnesium alloy composite cast ingot

An aluminum-magnesium alloy-clad and composite ingot technology is applied in the field of casting an aluminum-magnesium alloy-clad composite ingot, which can solve the problems of poor interface bonding ability and low yield, and achieve a small thickness of the coating layer and the ability to fill the mold. Good results

Inactive Publication Date: 2012-02-15
SOUTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aluminum-clad magnesium alloy ingot is prepared by the casting composite method, aiming to solve the problems of low yield and poor interface bonding ability in the traditional process of preparing magnesium-based aluminum-clad composite strips

Method used

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  • Preparation method of casting aluminum-coated magnesium alloy composite cast ingot
  • Preparation method of casting aluminum-coated magnesium alloy composite cast ingot
  • Preparation method of casting aluminum-coated magnesium alloy composite cast ingot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Grade and composition of cladding aluminum alloy:

[0018] 1060 pure aluminum plate, its mass fraction: contains Fe 0.21%, Si 0.09%, Cu 0.01%, Mn 0.01%, Mg 0.01%, Zn 0.02%, Ti 0.17%, and the rest is Al.

[0019] Grade and composition of core magnesium alloy:

[0020] AZ31 magnesium alloy ingot, its mass fraction: 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.

[0021] Specific steps:

[0022] (1) The 1060 pure aluminum plate with a thickness of 1.6 mm is continuously welded by argon arc welding into a prefabricated aluminum plate box with a size of 300 mm×150 mm×20 mm and one side opening;

[0023] (2) Grind the embossed part of the welding interface with a grinding wheel to make the sides of the aluminum plate box smooth; use 5% NaOH solution, 5% hydrochloric acid solution and absolute ethanol to clean the cavity of the aluminum plate box in order to remove surface oil and oxides Then place it in a resistance oven w...

Embodiment 2

[0027] Grade and composition of cladding aluminum alloy:

[0028] 1060 pure aluminum plate, its mass fraction: contains Fe 0.21%, Si 0.09%, Cu 0.01%, Mn 0.01%, Mg 0.01%, Zn 0.02%, Ti 0.17%, and the rest is Al.

[0029] Core material magnesium alloy composition:

[0030] Mg-2.0Mn-0.6Ca alloy, its mass fraction: contains Mn 2.0%, Ca 0.6%, and the rest is Mg.

[0031] Specific steps:

[0032] (1) The 1060 pure aluminum plate with a thickness of 1.6 mm is continuously welded by argon arc welding into a prefabricated aluminum plate box with a size of 300 mm×150 mm×20 mm and one side opening;

[0033] (2) Grind the embossed part of the welding interface with a grinding wheel to make the sides of the aluminum plate box smooth; use 5% NaOH solution, 5% hydrochloric acid solution and absolute ethanol to clean the cavity of the aluminum plate box in sequence to remove surface oil and oxides Place in a resistance oven with a protective atmosphere for preheating at 200°C;

[0034] (3)...

Embodiment 3

[0036] Grade and composition of cladding aluminum alloy:

[0037] 1060 pure aluminum plate, its mass fraction: contains Fe 0.21%, Si 0.09%, Cu 0.01%, Mn 0.01%, Mg 0.01%, Zn 0.02%, Ti 0.17%, and the rest is Al.

[0038] Core material magnesium alloy composition:

[0039] Mg-12Li alloy, its mass fraction: Li 12%, the rest is Mg.

[0040] Specific steps:

[0041] (1) The 1060 pure aluminum plate with a thickness of 1.6 mm is continuously welded by argon arc welding into a prefabricated aluminum plate box with a size of 300 mm×150 mm×20 mm and one side opening;

[0042] (2) Grind the embossed part of the welding interface with a grinding wheel to make the sides of the aluminum plate box smooth; use 5% NaOH solution, 5% hydrochloric acid solution and absolute ethanol to clean the cavity of the aluminum plate box in sequence to remove surface oil and oxides Place in a resistance oven with a protective atmosphere for preheating at 200°C;

[0043] (3) The materials used in the tes...

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Abstract

The invention relates to a preparation method of casting an aluminum-coated magnesium alloy composite cast ingot, and belongs to the field of material process engineering. The method comprises the following steps: (1) continuously welding an aluminum or aluminum alloy plate with thickness of 1-3mm by virtue of an argon-arc welding method to form a precast aluminum plate box with on opening on oneside, wherein the thickness of a clad layer of the aluminum plate accounts for 10 to 20 percent of the total thickness of the aluminum-coated magnesium alloy composite cast ingot; (2) performing mechanical grinding and chemical cleaning on the cavity of the precast aluminum plate box, removing oil stains and oxides from the surface, and placing the precast aluminum plate box in a resistor oven ina protective atmosphere to perform preheating treatment at 200 DEG C; (3) smelting the aluminum alloy core material under gas protection, and controlling the pouring temperature to be between 660 and720 DEG C; and (4) clamping the preheated aluminum plate box in a home-made mould, pouring molten aluminum alloy into the cavity of the aluminum box, and cooling to finally obtain the composite cast ingot. The prepared aluminum coated magnesium alloy composite cast ingot can form a multilayer complicated metallurgical combined interface structure, so that high-quality ingots are provided to subsequent hot rolled aluminum-coated magnesium alloy composite plate band.

Description

technical field [0001] The invention belongs to the technical field of material processing engineering and relates to a method for preparing a composite casting ingot of aluminum-clad magnesium alloy. Background technique [0002] Magnesium alloy has the characteristics of high specific strength, specific stiffness, good damping and shock absorption, easy chip processing and recyclability. It has broad application prospects in the fields of automobile industry, electronics industry and aerospace, and is known as the 21st century The lightest green structural material. However, due to the high chemical activity of magnesium, and the formed oxide film is loose and porous, it has insufficient protection ability for the substrate and is not suitable for most corrosive environments. The corrosion of magnesium alloys has become one of the key problems limiting the application of magnesium alloys. First, in addition, the poor processing deformation ability of magnesium alloys also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D19/16
Inventor 李坊平于文斌蒋显全李养良
Owner SOUTHWEST UNIV
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