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Method for preparing magnesium and aluminum dissimilar metal clad plate

A technology of dissimilar metals and composite plates, applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of strict workpiece positioning requirements, difficulty in realizing complex joint connection, and reducing joint strength and toughness, so as to improve production efficiency and facilitate the Promotion and application, the effect of eliminating hot brittleness

Inactive Publication Date: 2011-06-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A.C.Somasekharan et al. used friction stir welding technology to connect magnesium and 6061 aluminum alloy. Since friction stir welding relies on the friction of the stirring head to generate heat, the diffusion of elements and the recombination of grains realize the combination between magnesium and 6061 aluminum alloy. Strict requirements on workpiece positioning, only suitable for straight joints, difficult to achieve complex joint connections
A.Ben-Artzy et al. used different welding wires as filler metals, and used argon tungsten arc welding and electron beam welding techniques to weld pure aluminum and cast magnesium alloys, and found that the eutectic structure of magnesium and aluminum appeared near the joint fusion zone. And it is easy to form a continuous brittle phase near the fusion zone on the magnesium alloy side, reducing the strength and toughness of the joint

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A magnesium disc with a diameter of 50 mm and a thickness of 3 mm is laminated with an aluminum disc with a diameter of 50 mm and a thickness of 6 mm to make a magnesium and aluminum composite panel. The specific steps are as follows:

[0023] First, the surface of the magnesium disc and the aluminum disc is processed by a grinder to a smoothness of grade 6, polished with M280 metallographic sandpaper to make the surface roughness reach Ra 3.0 μm, and cleaned with a 58% alcohol solution by volume to remove the oxide film on the surface , then rinse with water. Then soak the magnesium disc and the aluminum disc in a 10% by volume dilute hydrofluoric acid solution for 5 minutes, wash with water, wash with acetone, and finally blow dry.

[0024] The magnesium disc and the aluminum disc are stacked together, and the four sides are continuously welded firmly by the pulse tungsten argon arc welding method; the welding process parameters of the pulse tungsten argon arc welding...

Embodiment 2

[0027] The method for making magnesium and aluminum composite panels by stacking magnesium panels with a length and width of 100 mm and a thickness of 10 mm with aluminum panels is as follows:

[0028] First, the surface of the magnesium plate and the aluminum plate is processed by a grinder to a smoothness of grade 6, and then polished with M280 metallographic sandpaper to make the surface roughness reach Ra 3.0 μm, and then cleaned with 60% alcohol solution by volume to remove oxidation on the surface of the magnesium plate and aluminum plate film, and then rinse with clean water. Then soak the magnesium plate and the aluminum plate in a 10% by volume dilute hydrofluoric acid solution for 6 minutes, wash with water, wash with acetone, and finally blow dry.

[0029] The magnesium plate and the aluminum plate are stacked together, and the four sides are continuously welded firmly by the pulse tungsten argon arc welding method; the welding process parameters of the pulse tungst...

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Abstract

The invention discloses a method for preparing a magnesium and aluminum dissimilar metal clad plate. The method comprises the following steps: the removing of oxidization films on the surfaces of a maThe invention discloses a method for preparing a magnesium and aluminum dissimilar metal clad plate. The method comprises the following steps: the removing of oxidization films on the surfaces of a magnesium plate material and an aluminum plate material, the stacking of the magnesium plate material and the aluminum plate material together, the continuous firm welding of four sides by a pulsed tunggnesium plate material and an aluminum plate material, the stacking of the magnesium plate material and the aluminum plate material together, the continuous firm welding of four sides by a pulsed tungsten argon arc welding method, the placement of a magnesium and aluminum superposition piece in a tank-type electric furnace after four-side welding, the pressing of the superposition piece, the heatisten argon arc welding method, the placement of a magnesium and aluminum superposition piece in a tank-type electric furnace after four-side welding, the pressing of the superposition piece, the heating of the magnesium and aluminum superposition piece at a temperature of between 460 and 520 DEG C, the implementation of diffusive connection and other steps. The method does not need to adopt vacuumng of the magnesium and aluminum superposition piece at a temperature of between 460 and 520 DEG C, the implementation of diffusive connection and other steps. The method does not need to adopt vacuumheating equipment with high price, has low connection temperature, can obtain the magnesium-aluminum diffusive welding clad plate of a crack-free brittleness-free compound in a common tank-type elect heating equipment with high price, has low connection temperature, can obtain the magnesium-aluminum diffusive welding clad plate of a crack-free brittleness-free compound in a common tank-type electric heating furnace; and the shearing strength of a connecting interface is between 22 and 30 MPa (reaching 50 percent of the shearing strength of a mother aluminum material) and can meet the using reric heating furnace; and the shearing strength of a connecting interface is between 22 and 30 MPa (reaching 50 percent of the shearing strength of a mother aluminum material) and can meet the using requirement of the magnesium and aluminum dissimilar clad plate.quirement of the magnesium and aluminum dissimilar clad plate.

Description

technical field [0001] The invention relates to a preparation method of a dissimilar metal composite plate, in particular to a method for preparing a magnesium and aluminum dissimilar non-ferrous metal composite plate in a non-vacuum diffusion connection manner, and belongs to the technical field of metal welding. Background technique [0002] The continuous research and development of structural materials is an important pillar to improve the technical level of welded structures. Among them, new-type non-ferrous metal materials are the most important type of materials. Aluminum and magnesium, which are high in the earth's crust, are non-ferrous metals. In particular, magnesium has the advantages of low density, high specific strength, high specific stiffness and can be recycled. [0003] The application of magnesium and magnesium alloys in the fields of auto parts, electronic products and aerospace continues to expand, and the proportion of replacing aluminum and aluminum ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/09B23K9/16B23K9/235B23K20/00
Inventor 李亚江张永兰
Owner SHANDONG UNIV
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