Flexible constraint layer for laser shock reinforcement online repair and manufacturing method of flexible constraint layer

Abstract

The invention discloses a flexible constraint layer for laser shock reinforcement online repair and a manufacturing method of the flexible constraint layer. The flexible constraint layer is prepared from bisphenol-A type epoxy resin and an amine curing agent according to a mass ratio of (1.5 to 3) to 1. The invention also discloses a manufacturing method of the flexible constraint layer for lasershock reinforcement online repair. The flexible constraint layer disclosed by the invention can be applied to a planar region, and also can be applied to a complicated curve-surface region; the manufactured constraint layer can effectively enhance the laser shock effect, and the process is stable and low in cost; and the maintenance efficiency of a machine can be effectively improved.

Description

technical field [0001] The invention relates to a flexible constrained layer for laser shock strengthening on-line repair and a manufacturing method thereof. Background technique [0002] Laser shock is a surface strengthening technology that applies a strong laser beam to the metal surface in the form of nanosecond short pulses to form a shock wave, which causes plastic deformation on the surface of the metal material and generates residual compressive stress inside. The current laser shock peening technology is mostly used in the manufacturing process of metal components or the off-line repair process of damaged components, and in these cases, clear water is mostly used as the constrained layer material for laser shock peening. There are also optical glass used as the constrained layer material in order to increase the peak pressure of the shock wave generated by the laser shock, but since the optical glass is mostly in the shape of a flat plate, the surface shape of the m...

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Problems solved by technology

There are also optical glass used as the constrained layer material in order to increase the peak pressure of the shock wave generated by the laser shock, but since the optical glass is mostly in the shape of a flat plate, the surface shape of the metal member is also limited to a plane

[0003] However, for laser shock strengthening of damaged metal components, if clear water is used as the constrained layer material, the damaged components can only be repaired off-line, that is, the damaged components are first disassembled from the machine and then transferred to a special workshop for laser shock strengthening. processing, which wastes time and increases costs; and if the existing optical glass or constrained layer film is used as the constrained layer material, it cannot adapt to various complex surface shapes that may appear in the damaged part of the component. In addition, the existing constrained layer film Also because of its high brittleness or high cost, it cannot be put into practical engineering use.

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