Method for improving interface connection of aluminum-magnesium dissimilar material

A technology of dissimilar materials and interfaces, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve problems such as complex process and difficult engineering application, and achieve the effect of increasing tensile shear load, preventing mutual diffusion, and improving performance

Pending Publication Date: 2022-05-13
NORTHWESTERN POLYTECHNICAL UNIV
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  • Application Information

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However, the method is complex and difficult to realize engineering application
Moreover, thi

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  • Method for improving interface connection of aluminum-magnesium dissimilar material
  • Method for improving interface connection of aluminum-magnesium dissimilar material
  • Method for improving interface connection of aluminum-magnesium dissimilar material

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Embodiment Construction

[0038] The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0039] The processing method of the present embodiment comprises the following steps:

[0040] (1) Grind the 2195 aluminum alloy plate (25×100mm) with 70#-400# sandpaper, remove the stain with alcohol, and the treatment area is the lap interface (25×25mm);

[0041] (2) Parameter selection: the powder particles are zinc powder, the gas pressure is 2.2MPa, the preheating temperature is 300°C, and the acceleration gas is nitrogen;

[0042] (3) Put the zinc powder into the powder feeding device, connect the high-pressure gas source, and turn on the gas heater, and form a high-speed particle flow through the spray gun;

[0043] (4) The substrate (2195 aluminum alloy) is clamped by a robotic arm, and then the overlapping area (25×25mm) of the 2195 aluminum alloy plate is processed by the a...

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Abstract

The invention discloses a method for improving interface connection of aluminum-magnesium dissimilar materials, and belongs to the technical field of metal structure material connection. The method comprises the following steps: firstly, polishing a lap joint area of an aluminum and magnesium material sample, then carrying out coating treatment on the lap joint area of the aluminum and magnesium material sample by adopting a high-speed particle flow of a powder feeding device, and cooling in an inert gas atmosphere or air after a coating is prepared; and finally, the aluminum and magnesium lap joint sample is subjected to backfill type friction stir spot welding. The zinc coating prepared by the invention can prevent mutual diffusion between aluminum and magnesium, reduce the generation of brittle phase (IMC) and improve the tensile shear load of the aluminum-magnesium lap joint. In the figure 5 of the specification, the mechanical properties of the joint without the coating and the joint after the zinc coating is prepared by using the method are compared, and the result shows that the performance of the joint is greatly improved indeed after the zinc coating is added by using the method.

Description

technical field [0001] The invention belongs to the technical field of connection of metal structural materials, and in particular relates to a method for improving the interface connection of aluminum and magnesium dissimilar materials. Background technique [0002] As a new green environmental protection engineering material, magnesium alloy has the advantages of light weight, high specific strength and high specific stiffness, and has broad application prospects in automobile lightweight, energy saving and emission reduction. However, the poor corrosion resistance of magnesium alloy is the main factor restricting its application. Aluminum alloy is one of the most widely used green structural materials in the industry, featuring low density, good formability and high corrosion resistance. Therefore, it is of great practical significance to connect aluminum alloys and magnesium alloys to give full play to the respective advantages of aluminum-magnesium alloys. However, th...

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Application Information

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IPC IPC(8): B23K20/12B23K20/24B23K20/26
CPCB23K20/128B23K20/1245B23K20/24B23K20/26
Inventor 邹阳帆申志康李文亚
Owner NORTHWESTERN POLYTECHNICAL UNIV
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