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A Remanufacturing and Strengthening Method of Structural Pores Based on Friction Stir Bonding

A technology of friction stir and structural holes, which is applied in the field of remanufacturing and strengthening of holes in light metal structural parts, remanufacturing and strengthening of structural holes. Effects of small deformation, easy implementation, and simple processing procedures

Active Publication Date: 2021-01-26
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the inner wall reinforcement of the existing structural hole is difficult to implement or the effect is not obvious, and to invent a structural hole remanufacturing and strengthening method based on friction stir joining

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  • A Remanufacturing and Strengthening Method of Structural Pores Based on Friction Stir Bonding
  • A Remanufacturing and Strengthening Method of Structural Pores Based on Friction Stir Bonding
  • A Remanufacturing and Strengthening Method of Structural Pores Based on Friction Stir Bonding

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Embodiment Construction

[0026] The present invention will be further described below with reference to the drawings and examples, but the embodiments of the present invention are not limited thereto.

[0027] Such as Figure 1-3 as shown,

[0028] A structural hole remanufacturing and strengthening method based on friction stir bonding, which comprises the following steps:

[0029] 1) According to the type of metal material of the structural parts, the metal material is used as the matrix, and the hard nano-particles are used as the reinforcement of the reinforcement phase by powder metallurgy. 3, the powder metallurgy production can effectively increase the compactness between the nanoparticles. The amount of added is added according to the service state of the structural part and the performance of the matrix metal of the structural part (generally, the volume fraction of hard nanoparticles in reinforcement 3 is 1-40%). The diameter of the reinforcing body 3 is the same as that of the structural ...

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Abstract

A structural pore remanufacturing and strengthening method based on friction stir bonding, which is characterized in that it includes the following steps: (1) According to the type of metal material of the structural part, making a reinforcement with metal material as the matrix and hard nanoparticles as the reinforcing phase (2) Assemble the reinforcement into the structural hole, start the friction stir joining equipment, completely connect the reinforcement (3) and the processing area (5), and make the hard nanoparticles in the reinforcement evenly dispersed in the in the processing area. (3) After the friction stir joining process is completed, the required hole size is machined at the center of the structural hole to complete the repair, remanufacture and strengthening of the structural hole crack. The invention adopts the friction stir connection processing, the residual stress and thermal deformation of the structural parts are small; the grain refinement in the processing area is obvious, and the nanoparticles evenly distributed around the hole wall can also play the role of nanoparticle strengthening, while ensuring the quality of the hole wall ; Green environmental protection, easy to implement.

Description

technical field [0001] The invention relates to a method for remanufacturing and strengthening holes, in particular to a method for remanufacturing and strengthening holes of light metal structural parts, in particular to a method for remanufacturing and strengthening structural holes based on friction stir connection. Background technique [0002] Aeronautical structural parts are subject to complex alternating loads during service. Under the action of alternating loads, fatigue cracks and fatigue failures are likely to occur at the edges of the structural parts, which will affect the reliability, safety and service life of structural parts and complete machine equipment. great influence. Fatigue failure is one of the most important failure forms of structural parts during service. It is reported that in various fields of modern industry, about 50-90% of structural strength damage is caused by fatigue damage, and fatigue failure Most of the fatigue cracks in the structural...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/12
CPCB23K20/128
Inventor 左立生左敦稳孙玉利盛一黎向锋
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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