Laser shock strengthening method for tenon groove portion of high-temperature alloy small-size turbine disc

Abstract

The invention discloses a laser shock strengthening method for a tenon groove portion of a high-temperature alloy small-size turbine disc, and belongs to the field of laser strengthening. The method comprises the following steps of designing a track scheme of the laser shock strengthening of the tongue-and-groove of the turbine disc, and adopting different laser shock strengthening parameters andlaser oblique incidence angles for different parts of the tenon tooth of the same tenon groove; importing the robot clamp model into corresponding space position in a robot simulation system softwareaccording to the space position data of an object; generating a laser shock strengthening robot track program of the tenon groove; compiling a robot program; generating a robot laser shock strengthening track program of all the tenon grooves of the whole turbine disc; determining laser parameters of the laser shock strengthening of the portion of each tenon tooth waiting for shock strengthening and the corresponding tenon groove bottom of different tenon grooves; and carrying out the laser shock strengthening on the turbine disc. According to the method, the problem of accessibility of light beams can be solved, the laser shock strengthening parameters of each point can be accurately quantified, variable parameter laser shock strengthening is realized, and the flexibility is achieved.

Description

technical field [0001] The invention relates to the field of laser shock strengthening, in particular to a laser shock strengthening method for the mortise and groove parts of a small-sized turbine disk of a superalloy. Background technique [0002] When the aero-engine is working, the turbine disk is mainly subjected to centrifugal stress and thermal stress, both of which change cyclically with the change of the engine's working state. The turbine disk also has a large residual stress effect. Due to the complex shape of the disk, some high-stress parts with local stress concentration often appear during work. [0003] Laser shock strengthening technology, as a surface treatment technology in the foreword, induces plastic deformation on the surface of the part through the shock wave induced by laser, forming a large residual compressive stress, and at the same time can cause changes in the microstructure of the part, thereby significantly improving the mechanical properties ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the present invention provides a laser shock strengthening method for the mortise and groove of a small-sized turbine disk of a high-temperature alloy, which can solve the problem of poor beam accessibility

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