Composite processing technology for twisting, upsetting and drawing out high-entropy alloy

Abstract

The invention belongs to a composite processing technology for twisting, upsetting and drawing out a high-entropy alloy material, and relates to a high-efficient plasticity modification method by adopting a high-entropy alloy as an application object. The invention aims to solve the problems that a casting-state structure of the high-entropy alloy mainly adopts thick and big pine-tree crystals, sothat a comprehensive mechanical property is poor, and the structure needs to be plasticity-modified and refined. The preparation method mainly comprises the steps of preparing a high-entropy alloy ingot, carrying out homogenizing heat treatment and analogue simulation, forging through twisting, upsetting and drawing out, and obtaining an ingot blank of the high-entropy alloy. According to the composite processing technology for twisting, upsetting and drawing out the high-entropy alloy material provided by the invention, when the high-entropy alloy ingot is processed, a certain twisting forceis applied during an upsetting process, so that a stress state in the high-entropy alloy material during the process is effectively controlled; and a shear stress is applied during a deformation process so as to refine grains, so that the upsetting and drawing efficiency is improved, and high-efficient modification of the high-entropy alloy is realized. According to the composite processing technology for twisting, upsetting and drawing out the high-entropy alloy material provided by the invention, the plasticity modification efficiency of the high-entropy alloy can be eventually effectivelyimproved, a microstructure is refined, and the comprehensive mechanical property is improved.

Description

technical field [0001] The invention belongs to a composite processing technology method for modifying metal materials through plastic forming processing, and is a material plastic modification method with high-entropy alloys as the application object. Background technique [0002] Throughout the ages, all aspects of human production and life are inseparable from the research and development and utilization of materials, and materials play an inestimable and important role in the development process. With the rapid development of modern economy, technology and military, people have higher and higher requirements on the service performance of alloys. The high-entropy alloy breaks through the limitation of traditional alloys based on one or two elements, and is a new type of alloy material formulated by five or more elements in an equimolar ratio. It has high strength, high hardness, wear resistance, and Corrosion and high temperature oxidation resistance and other excellent ...

AI Technical Summary

Problems solved by technology

[0004] However, upsetting is a unidirectional stress. During the compression deformation process, the grains only bear continuous force and deformation in a single direction, and the grain refinement efficiency is low, resulting in longer modification process cycle, increased energy consumption, and lower upsetting efficiency.

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