Process for improving the efficiency of ion nitriding of an extrusion die for aluminium alloys

Abstract

The present application relates to the technical field of material surface treatment, and particularly relates to a process for improving ion nitriding efficiency of a mold, comprising the following steps: firstly, an original aluminum alloy extrusion mold is processed into a standard sample by adopting electric spark wire cutting technology; then, the sample is subjected to solid solution aging treatment, and after mechanical polishing, surface degreasing treatment is performed by using an acetone solution and a drying process is completed; the present application has the beneficial effect that pulse plasma explosion treatment increases the roughness and specific surface area of the material surface; in addition, pulse plasma action causes significant plastic deformation of the material, promotes the generation of surface nanocrystalline grains and the formation of internal defects such as dislocation cells, dislocation walls, twins and the like, which enhances the activity and surface free energy of the material, so that more nitrogen atoms can be adsorbed, and the adsorption effect forms a high nitrogen concentration on the material surface, which is beneficial to the formation of nitrides.

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