Method for treating connection strength of reinforced composite material and metal through ultrafast laser

A technology for enhancing composite materials and ultra-fast lasers, applied in laser welding equipment, metal processing equipment, welding equipment, etc., can solve the problem of unstable joint interface bonding effect of heterostructure joints, difficult to control mechanical treatment, and pollute the environment. Gas and other problems, to achieve the effect of improving pretreatment efficiency, stable removal effect, and small heat affected zone

Pending Publication Date: 2021-09-21
BEIJING UNIV OF TECH
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  • Abstract
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  • Application Information

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Problems solved by technology

However, the mechanical treatment is difficult to control, and the bonding effect of the heterostructure joint connection interface is unstable.
The chemical cleaning process is not only cumbersome, but also produces gases that pollute the environment.

Method used

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  • Method for treating connection strength of reinforced composite material and metal through ultrafast laser
  • Method for treating connection strength of reinforced composite material and metal through ultrafast laser
  • Method for treating connection strength of reinforced composite material and metal through ultrafast laser

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with specific examples, but the present invention is not limited to the following examples.

[0030] This embodiment provides a FRP / metal material connection joint strengthening method, including the following steps:

[0031] Step S1, using an ultrafast laser to remove the thin oxide film at the connection interface of the metal material.

[0032] As an advanced processing technology, ultrafast laser has an ultrashort pulse width that can effectively suppress thermal diffusion and realize "cold processing". Therefore, ultrafast lasers have unique advantages in removing metal oxide films.

[0033] Step S2, using an ultrafast laser to etch a microstructure on the surface of the metal material after the oxide film has been removed.

[0034] The laser pre-etching treatment and the mechanical bonding enhancement process in the prior art, including sandpaper grinding, shot blasting, etc., are all...

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Abstract

The invention provides a method for treating the connection strength of a reinforced composite material and metal through ultrafast laser. According to the method, firstly, the purpose of effectively removing the oxide film thin layer of the metal material is achieved by controlling process parameters such as ultrafast laser scanning line spacing, laser power and a scanning speed, then a microstructure is etched on the metal surface without the oxide film through the ultrafast laser, by increasing an actual connecting area of the fiber reinforced composite material and the metal material, the mechanical anchoring effect of a heterostructure joint is improved, and the shearing strength of a connecting joint is greatly improved. The method has the advantages of being high in structural controllability, high in efficiency, free of pollution and the like, and has good industrial application prospects.

Description

technical field [0001] The invention relates to the connection of fiber-reinforced composite materials (FRP) and metal materials of different materials, and belongs to the technical field of advanced manufacturing. Background technique [0002] Fiber-reinforced composites (FRP) have high specific strength, good corrosion resistance and excellent fatigue resistance, and are widely used in aerospace, automobile manufacturing and other fields. Metal materials have the advantages of good machinability, thermal conductivity and low cost. In order to give full play to the superior performance of the two materials, the connection of FRP and metal materials must be involved in large structural parts such as aircraft and automobiles. [0003] In the relevant research results at home and abroad, adhesive bonding and welding are more commonly used methods for connecting FRP and metal materials. However, the poor mechanical properties of heterostructure joints obtained by gluing and w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/352B23K26/362
CPCB23K26/355B23K26/352B23K26/362
Inventor 黄婷王栋肖荣诗徐洁洁
Owner BEIJING UNIV OF TECH
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