Metal material surface electromagnetic wave impact strengthening method

Abstract

The invention discloses a metal material surface electromagnetic wave impact strengthening method. Electromagnetic waves serve as an energy source, a ceramic material serves as a restraint layer, and metal powder particles serve as an absorption layer; the electromagnetic wave wavelength is adjusted to be consistent with the particle size of metal powder particles and is excited to generate resonance, and the metal powder is promoted to absorb energy to form plasma to impact the surface of the metal material, thereby realizing surface strengthening treatment; meanwhile, electronic wind power and a skin effect are generated under the action of electromagnetic waves on metal electrons with certain depth on the surface layer of the material, heat is generated on the metal surface layer, structural defects such as surface layer microcracks and micropores are eliminated, and the surface integrity of the material is improved. The method has the advantages of being non-contact, high in flexibility, large in strengthening area and the like, a residual compressive stress layer is induced to be generated through the thermal-mechanical coupling effect of electromagnetic waves on the metal surface, grain refinement is promoted, and internal microdefects of a surface layer material are eliminated, so that the manufacturing level of parts is improved, remanufacturing of damaged components is promoted, and metal material surface modification and service life prolonging are achieved.

Description

technical field [0001] The invention belongs to the field of surface modification of metal materials, and in particular relates to a non-contact, highly flexible surface strengthening and toughening modification technology for key components, and specifically discloses a method for strengthening the surface of metal materials by electromagnetic wave impact. Background technique [0002] Fatigue, corrosion and fracture are the main forms of component failure, and the metal surface is the weakest part of the material failure initiation, and the structural integrity of the material surface is closely related to its mechanical properties. The use of surface strengthening can effectively improve the mechanical properties of metal materials, improve the design and manufacturing level of key parts, promote the remanufacturing of damaged components, and realize the life extension of key metal parts. [0003] At present, surface strengthening technologies include shot peening, surfac...

AI Technical Summary

Problems solved by technology

Among them, methods such as shot peening and mechanical grinding destroy the integrity of the original surface of the material, and are only suitable for the strengthening of plane or regular geometric surfaces; while the stability of ultrasonic impact energy is poor, and the rate of defective products cannot be controlled; although laser shock strengthening has high flexibility , non-contact and other characteristics, but only single-point one-by-one impact strengthening method can be used, which has high cost and low efficiency

At present, there is no non-contact, highly flexible, large-area and efficient surface strengthening process

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