High energy ultrasonic field regulation and control method for residual stress

Abstract

The invention relates to a high energy ultrasonic field regulation and control method for residual stress. The method is based on the substance of the process of eliminating the residual stress, and mainly utilizes the granule fluctuation energy of the high energy sound wave to offer enough power for dislocation atoms, so that the dislocation atoms can overcome the resistance and reduce lattice distortion by sliding out of the interior of a crystal so as to eliminate the residual stress. According to the method, a formula of the high energy ultrasonic for offering energy for the material is provided, so that a method for selecting a high energy ultrasonic transducer is provided, and the high energy ultrasonic field of the residual stress of metal or nonmetal components is regulated and controlled. According to the method, the processes are simple, effects of the residual stress at the present stage on the usage, stability of the size, the fatigue strength, abrasive resistance and stress corrosion cracking and the like of the component are effectively eliminated, the method has the advantages of high efficiency, energy conservation, environment friendliness and the like, thus having wide application range.

Description

1. Technical Field [0001] The invention relates to a method for eliminating residual stress in an elastic solid component, in particular to a high-energy ultrasonic sound field to realize in-situ elimination, suppression and reconstruction of the local residual stress distribution of an in-service metal or non-metal component. 2. Background technology [0002] Elastic solid components will produce residual stress to varying degrees during cold and hot processing. The existence of residual stress has a significant impact on the static strength, fatigue strength, structural deformation and service life of the component. [0003] Traditional methods such as natural aging and heat treatment are used to weaken and eliminate residual stress. However, natural aging takes a long time, is low in efficiency, covers a large area, and is difficult to control; the heat treatment has a long cycle, high energy consumption, high economic cost, workpieces are easily oxidized, serious pollution, and...

AI Technical Summary

Problems solved by technology

However, the disadvantage of this technology is that the magnetic circuit device is relatively complicated, and it is inconvenient to use and operate on site, and it is only applied to the residual stress generated by welding.

This method also has deficiencies: while the ultrasonic impact is homogenizing the residual stress of the in-service components, the surface of the mechanical components is affected by the impact of the horn, which usually brings impact damage or even cracks or tiny cracks. , these impact damages are absolutely not allowed, and will greatly affect the safety and reliability of the mechanical structure

In essence, the above two methods are not suitable for the elimination of residual stress of non-metallic components (such as composite materials, ceramics, glass, etc.)

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