Method for prolong service life of intermetallic compound and controlling deformation through laser shock processing

Abstract

The invention provides a method for prolonging the service life of an intermetallic compound and controlling the deformation through laser shock processing. The method comprises the following steps of: step 1. clamping a part; step 2. clearing the part; step 3. arranging an absorbing layer; step 4. applying a constraining layer; step 5. programming; step 6. reinforcing the root of the blade; step7. reinforcing the air intake side and air exhausting side of the blade; step 8. removing the absorbing layer and clearing; step 9. presetting a shape correcting absorbing layer; and step 10. carryingout laser shock processing shape correcting. According to the characteristics of materials and structure of the intermetallic compound blade and the different reinforcing areas, laser shock processing gradient technological parameters are designed to meet the requirements for prolonging the vibratory fatigue life of the blade; and meanwhile, a specific area is selected according to the engineering experience, and a laser shock processing high-frequency shape correcting absorbing layer and process parameters are designed for controlling the deformation of the blade, so that the reinforced blade meets the requirements for fatigue life and deformation control at the same time.

Description

Technical field [0001] The invention belongs to the field of surface strengthening technology, and specifically relates to a method for life improvement and deformation control of laser shock strengthening of intermetallic compounds. Background technique [0002] Laser shock strengthening technology (Laser shock processing, referred to as LSP) is a new technology that uses strong laser-induced shock waves to strengthen metal surfaces. When short pulse high peak power density laser irradiates the metal surface, the metal surface absorption layer (protective layer) absorbs the laser energy and explosively vaporizes and evaporates, generating high-pressure (GPa) plasma. The plasma is constrained by the constraint layer and generates high pressure when it explodes. Shock waves act on the metal surface and propagate inside. While a dense and stable dislocation structure is formed on the surface of the material, strain hardening occurs on the surface of the material, leaving a la...

AI Technical Summary

Problems solved by technology

At present, surface strengthening includes laser shock strengthening, shot peening, vibration finishing, extrusion, etc. There are many studies on titanium alloy, aluminum alloy, stainless steel and other materials, but there are very few studies on intermetallic compound strengthening.

[0005] Aiming at the large amount of deformation of thin-walled parts caused by shot peening, it is difficult to accurately control the deformation; the fatigue performance of vibration finishing is insufficient; extrusion strengthening is not suitable for thin-walled parts, so an intermetallic compound laser shock is proposed. Enhanced Lifetime Improvement and Deformation Control Method

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