High-strength toughness low-activation fecrvo multi-principal element alloy and preparation method thereof

Abstract

The present invention involves nuclear energy and preparation fields, providing a high -strong tough and low -activation FECRVO multi -primary element alloy and preparation method. The alloy atomic percentage expression FE a CR b V c O d , 20≤A ≤ 35, 20≤b ≤ 35, 20≤c ≤ 35, 0 <d≤3, A+B+C+D = 100.Preparation process: Remove the surface oxidation of the raw material FE, CR, V, accurately weigh the Moore ratio, and O element with a low melting point V 2 O 5 Add in the form; melted target alloys in non -self -consuming real vacuum arc furnaces or real vacuum suspended melt furnaces, and obtained alloys with vacuum suction or casting method.The invention innovatively improves the strength and compression of the FECRV multi -primary metal alloy by adding O elements. The comprehensive stretching performance is significantly better than the existing low -activated multi -main metal alloys;Sexual and excellent radiation resistance, with application prospects in the field of nuclear energy.

Description

technical field [0001] The invention relates to the technical field of nuclear energy structural materials and preparation, in particular to a high-strength, toughness and low-activation FeCrVO multi-principal alloy and a preparation method thereof. Background technique [0002] The development of a safe and efficient advanced nuclear energy system is a major strategic demand of the country, and the radiation resistance of nuclear structural materials is one of the key factors affecting the safety and economics of nuclear energy reactors, especially the operating environment of fourth-generation reactors and fusion reactors The complex and harsh service environment with high neutron radiation dose and high temperature puts forward more stringent performance requirements for nuclear energy structural materials. Therefore, it is firstly required that the material has low activation characteristics, is not easy to be activated after neutron irradiation, and has low residual rad...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, aiming at the service environment of advanced reactors and fusion reactor structural materials, the advantages of multi-principal alloys in the ability to resist radiation defects, select low-activation alloys, and provide a single-phase BCC At the same time, aiming at the problem of poor toughness of BCC structure multi-principal alloys, innovatively use O element to strengthen the BCC structure low-activation FeCrV multi-principal alloy gold system, and through the melting process, not Limited to arc melting and vacuum magnetic levitation melting processes, FeCrVO-based multi-principal solid solution alloys with high strength, toughness and low activation are prepared

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