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An alloy-composite material friction stir welded joint and its preparation method

A composite material and friction stir technology, which is applied in welding equipment, metal material coating technology, non-electric welding equipment, etc., can solve the problem of low strength of the connection interface, and achieve the effects of easy industrialization, strong adaptability, and improved uniformity

Active Publication Date: 2022-05-10
SHENYANG AEROSPACE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, some scholars have applied this technology to the connection of light alloys and composite materials, but the common problem is that the strength of the connection interface is not high.

Method used

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  • An alloy-composite material friction stir welded joint and its preparation method
  • An alloy-composite material friction stir welded joint and its preparation method
  • An alloy-composite material friction stir welded joint and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The aluminum alloy whose surface is covered with CNTs coating comprises the following steps:

[0038] (1) spray catalyst

[0039] A nickel nitrate solution with a concentration of 1 mol / L is uniformly sprayed on the surface of the aluminum alloy through a spray gun to obtain a catalyst-loaded aluminum alloy workpiece;

[0040] (2) Preparation by flame method

[0041] The catalyst-loaded aluminum alloy workpiece was placed at a position where the temperature of the ethanol flame was 1000° C., and stayed for 10 minutes to prepare an aluminum alloy whose surface was covered with a CNTs coating with a thickness of 16 um.

[0042] The microscopic morphology of the aluminum alloy whose surface is covered with CNTs coating prepared in this example is shown in figure 1 , it can be seen from the figure that the CNTs on the aluminum alloy are intertwined with each other to form a haphazard coating.

[0043] Preparation of aluminum alloy-GF (glass fiber) / PEI composite material ...

Embodiment 2

[0047] The preparation of the nickel-chromium alloy whose surface is covered with CNTs coating comprises the following steps:

[0048] (1) spray catalyst

[0049] The ferric chloride solution with the concentration of the prepared substance being 1mol / L is evenly sprayed on the surface of the nickel-chromium alloy by a spray gun to obtain a catalyst-loaded nickel-chromium alloy workpiece;

[0050] (2) Preparation by flame method

[0051] The catalyst-loaded nickel-chromium alloy is placed in a place where the temperature of the methane flame is 900° C., and stays for 15 minutes to prepare a nickel-chromium alloy workpiece covered with a CNTs coating with a thickness of 15 μm.

[0052] The preparation of CNTS coating interface enhanced nickel-chromium alloy-GF / PEI composite material friction stir welding joint includes the following steps: the surface of the composite material workpiece is decontaminated, cleaned and other pretreatments are installed on the workbench, and fixe...

Embodiment 3

[0055] The iron-chromium alloy whose surface is covered with CNTs coating comprises the following steps:

[0056] (1) spray catalyst

[0057] Cobalt nitrate solution with a concentration of 1 mol / L of the prepared substance is uniformly sprayed on the surface of the iron-chromium alloy through a spray gun to obtain a catalyst-loaded iron-chromium alloy workpiece;

[0058] (2) Preparation by flame method

[0059] Put the catalyst-loaded iron-chromium alloy at a position where the temperature of the ethane flame is 900° C., and stay there for 10 minutes to prepare an iron-chromium alloy workpiece covered with a CNTs coating with a thickness of 14 μm.

[0060] The preparation of a CNTs coating interface-enhanced iron-chromium alloy-GF / PEEK composite material friction stir welding joint includes the following steps:

[0061] After decontamination and cleaning the surface of the composite workpiece, install it on the workbench and fix it with a fixture; place the PEEK resin film ...

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Abstract

The invention relates to the field of welding of dissimilar materials, in particular to an alloy-composite material friction welding joint and a preparation method thereof. In the present invention, the CNTs coating is grown in situ on the surface of the alloy through a flame method synthesis process, and then the alloy covering the CNTs coating is used to coat an intermediate thermoplastic resin film, and then welded with the composite material, and a high-strength alloy is obtained after cooling ‑Composite friction welded joints. Due to the unique conduction and heat transfer effects of CNTs, the melting state of the resin in the welding area is improved; at the same time, due to the nano-reinforcement effect of CNTs, the interface bonding strength between the alloy and the resin is significantly improved, thereby increasing the strength of the welded joint. The method in the invention is simple and fast, low in cost, high in efficiency, high in flexibility, strong in adaptability, easy to be promoted in industrialization, and can be applied to connection and assembly of large-scale dissimilar material structures with complex curved surfaces.

Description

technical field [0001] The invention relates to the field of welding of dissimilar materials, in particular to an alloy-composite material friction stir welded joint and a preparation method thereof. Background technique [0002] As the demand for lightweight engineering increases, the connection of metals and polymers, especially the connection of lightweight alloys and composite laminates, is particularly important. At present, the connection of lightweight alloys and composite laminates mainly includes bonding and mechanical connections. The mechanical connection of composite materials has the advantages of easy quality control, easy loading and unloading, safety and reliability, small strength dispersion, and good load transfer performance; at the same time, it also has disadvantages such as stress concentration caused by opening holes, low connection efficiency, and increased fastener weight; mechanical The connection will generally increase the weight of the structura...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12B23K20/24B23K20/26B23K33/00C23C26/00
CPCB23K20/122B23K20/24B23K20/26B23K33/00C23C26/00
Inventor 崔旭田琳王道晟赵普蒲永伟熊需海孟庆实王朔李晓东张辰许鹏贺军李威
Owner SHENYANG AEROSPACE UNIVERSITY
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