Method for preparing high-entropy alloy through laser additive manufacturing

Abstract

The invention relates to a method for preparing a high-entropy alloy through laser additive manufacturing. The method comprises the following steps that A, grinding, washing and drying of substrates are carried out, and the substrates are preheated; B, prepared high-entropy alloy powder is subjected to ball milling treatment and is stirred evenly to be subjected to deposition; C, according to theperformance requirements of bulk high-entropy alloy components, laser processing parameters for machining each deposition layer is pre-designed; D, according to the preset laser processing parametersof each layer, the surfaces of the substrates are subjected to layer-by-layer variable parameter laser additive manufacturing; and E, after processing is carried out, prepared bulk alloy components are slowly cooled to room temperature, a wire cutting method is used for separating the additive manufacturing components from the substrate, and then hot isostatic pressing is carried out. By means ofthe method, while the molded piece performance is met, the production cycle is shortened, cost is reduced, and large-scale parts in complicated shapes can be prepared.

Description

technical field [0001] The invention belongs to the technical field of alloy materials and their preparation, and in particular relates to a preparation method for laser additive manufacturing of high-entropy alloys. Background technique [0002] High-entropy alloy is a new type of metal material, which was proposed by Taiwan scholar Ye Junwei in 2004. It is composed of five or more metal elements in an equimolar mass ratio or approximately equimolar mass. Unlike traditional alloys, due to high entropy effects and lattice distortion effects, this alloy has some excellent mechanical properties, such as high Hardness, strength, corrosion resistance and wear resistance, especially excellent mechanical properties at low and high temperatures, high thermal stability and high temperature oxidation resistance, have a wide range of application prospects. At present, the preparation methods of high-entropy alloys mainly include methods such as melting and casting, powder metallurgy,...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem that the existing traditional preparation methods cannot prepare functionally graded high-entropy alloys, the present invention proposes a new method for preparing high-entropy alloys by laser additive

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