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Magnesium alloy and aluminum alloy connecting method and device

A connection device and connection method technology, which is applied in welding equipment, metal processing equipment, metal material coating technology, etc., can solve the problem of large deformation of magnesium-aluminum alloy joints, reduction of magnesium-aluminum alloy connection strength, unfavorable aluminum-magnesium alloy connection, etc. problem, achieve the effect of reducing heat loss, improving connection strength, and avoiding the generation of magnesium-aluminum intermetallic compounds

Inactive Publication Date: 2018-03-02
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the inventors found that the method adopted a larger extrusion ratio, resulting in larger deformation of the magnesium-aluminum alloy joint, and the interface is not beautiful; in addition, the thickness of the amorphous alloy sheet is large, and a large intermediate transition will be formed after extrusion layer; and due to the high strength of the amorphous alloy, a large extrusion force is required to realize the connection between the magnesium alloy, the amorphous alloy sheet, and the aluminum alloy, which is easy to cause amorphous crystallization, and after amorphous crystallization Hardness increases, plasticity decreases, and reduces the connection strength of magnesium-aluminum alloys, which is not conducive to the connection of aluminum-magnesium alloys; in addition, the surface of the sample is not coated in this patent application, which is easy to oxidize, and the heating rod and heating mold are used to The sample is heated, the speed is slow (1-2h), and the efficiency is low; for this reason, the inventor has proposed a new method of combining the magnetron sputtering coating technology to connect the magnesium alloy and the aluminum alloy by heating and pressing. method, to overcome the deficiencies in this patent application

Method used

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  • Magnesium alloy and aluminum alloy connecting method and device
  • Magnesium alloy and aluminum alloy connecting method and device
  • Magnesium alloy and aluminum alloy connecting method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Grinding and polishing the end faces of a magnesium alloy rod (AZ31B) and an aluminum alloy rod (7075) with a diameter of 10 mm and a length of 30 mm;

[0046] Among them, the grinding fingers of magnesium and aluminum alloys: use 400 # Sandpaper, 600 # Sandpaper, 800 # Sandpaper, 1200 # Sandpaper, 1500 # Grind the surface of the magnesium-aluminum alloy with sandpaper until it is bright, then put the bright magnesium alloy in alcohol to ultrasonically clean it for 15-20 minutes, take it out and blow it dry with a hair dryer;

[0047] The polishing of magnesium-aluminum alloy refers to: polish the polished sample with diamond polishing agent with particle size of W2.5, W1.5 and W0.5 in turn, polish the polished sample to a mirror effect, and then clean it with alcohol After drying, finally sealed in the sample bag.

[0048] (2) Then use magnetron sputtering equipment to carry out sputter coating on the polished magnesium and aluminum alloy rod end faces, so tha...

Embodiment 2

[0052] (1) The end faces of a magnesium alloy rod (AZ31B) with a diameter of 20 mm and a length of 30 mm and an aluminum alloy (7075) with a length of 30 mm, a width of 20 mm and a height of 20 mm were ground and polished according to the method in Example 1.

[0053] (2) Then use magnetron sputtering equipment to carry out sputter coating on the polished magnesium and aluminum alloy rod end faces, so that a layer of amorphous film is formed on the end faces of magnesium and aluminum alloy rods, and the coating target is zirconium-based amorphous LM1B, The thickness of the amorphous film is 1 μm.

[0054] (3) Fix the magnesium and aluminum alloy rods after sputtering coating on the fixture, place the ring electrode in the area where the aluminum alloy and magnesium alloy are to be heated, and wrap two layers of 5mm thick heat insulation cotton on the magnesium alloy and aluminum alloy , The surface of the ring-shaped heating electrode, fix the infrared thermometer so that the ...

Embodiment 3

[0057] (1) The end faces of magnesium alloy rods (AZ31B) and aluminum alloy rods (7075) with a diameter of 20 mm and a length of 30 mm were ground and polished according to the method in Example 1.

[0058] (2) Then use magnetron sputtering equipment to carry out sputter coating on the polished magnesium and aluminum alloy rod end faces, so that a layer of amorphous film is formed on the end faces of magnesium and aluminum alloy rods, and the coating target is zirconium-based amorphous LM1B, The thickness of the amorphous film is 2 μm.

[0059] (3) Fix the magnesium and aluminum alloy rods after sputtering coating on the fixture, place the ring electrode in the area where the aluminum alloy and magnesium alloy are to be heated, and wrap two layers of 5mm thick heat insulation cotton on the magnesium alloy and aluminum alloy , The surface of the ring-shaped heating electrode, fix the infrared thermometer so that the laser hits the joint of the magnesium-aluminum alloy, turn on ...

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Abstract

The invention provides a magnesium alloy and aluminum alloy connecting method. A matched device is designed aiming at the magnesium alloy and aluminum alloy connecting method. A layer of micron-levelamorphous thin film is sputtered on a to-be-connected part of each sample through the magnetron sputtering technology as a connecting medium; not only is oxidation of the connecting parts avoided, butalso generation of a magnesium-aluminum intermetallic compound is avoided; meanwhile, the defects of pores, macrocracks and the like do not exist between the connecting area of a magnesium alloy andan aluminum alloy and the magnesium alloy as well as between the connecting area of the magnesium alloy and the aluminum alloy and the aluminum alloy; the residual stress in transition layers can be reduced by a large margin through the amorphous thin films serving as intermediate layers; and the transition areas of the amorphous thin films are small, so that the influence on the overall performance of the magnesium alloy and the aluminum alloy is less, the bonding strength of a magnesium-aluminum connector is improved significantly, and magnesium-aluminum connection is firmer.

Description

technical field [0001] The invention belongs to the field of connecting magnesium alloys and aluminum alloys, and in particular relates to a method and a device for connecting magnesium alloys and aluminum alloys. Background technique [0002] As an engineering structural material, aluminum alloy has low density, high strength and good plasticity, and can be processed into various profiles. Because of its excellent electrical conductivity, thermal conductivity and corrosion resistance, it is widely used in automobiles, ships, trains, On vehicles such as space shuttles. With the decline in the price of magnesium alloys, magnesium alloys are increasingly used in automobiles and other industries due to their good processability, shock resistance, and light weight. When the application fields of magnesium alloy and aluminum alloy intersect, it is inevitable to encounter connection problems. Solve the connection problem of magnesium alloy and aluminum alloy, give full play to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/02B23K20/24B23K20/26C23C14/35C23C14/16
CPCB23K20/025B23K20/24B23K20/26C23C14/165C23C14/35
Inventor 李辉平周卫鲁李志超朱希斌孙亚星孙然贺连芳
Owner SHANDONG UNIV OF SCI & TECH
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