Irradiation-resistant Cu-containing nanocluster reinforced high-strength low-alloy steel and preparation method thereof

Abstract

The invention belongs to the technical field of nuclear structure materials and preparation thereof, specifically relates to irradiation-resistant Cu-containing nanocluster reinforced high-strength low-alloy steel and a preparation method thereof and aims to provide high-strength and high-ductility irradiation-resistant Cu-containing nanocluster reinforced high-strength low-alloy steel and a preparation method thereof. The method comprises the following steps of preparing a raw material according to components and the mole percentage; feeding the raw material in a crucible, conducting vacuum pumping, introducing argon and starting smelting; rolling a casting ingot obtained through smelting into a plate with the thickness of 2 mm through different processes; and conducting solid solution and aging treatment and ion irradiation treatment. Through the design of the alloy components, a Cu-rich nanocluster reinforced alloy is separated out through aging treatment. Cu-rich nanoclusters can improve the irradiation performance as irradiation induced defect traps. The irradiation-resistant Cu-containing nanocluster reinforced high-strength low-alloy steel can resist high-dose ion irradiation of more than 50 dpa, has excellent irradiation-resistant performance and has good application prospects in the field of nuclear structure materials, especially steel for pressure vessels.

Description

technical field [0001] The invention belongs to the technical field of nuclear structure materials and their preparation, and in particular relates to a radiation-resistant Cu nano-cluster-containing reinforced high-strength low-alloy steel and a preparation method thereof. Background technique [0002] One of the most important issues in the application of nuclear energy is nuclear safety. The safety and stability of nuclear engineering structural materials is a key factor that determines whether nuclear power plants, mobile nuclear power, and future fusion reactors can operate safely. During the long-term operation of nuclear reactors, due to the radiation of strong particles such as neutrons on the material, the material atoms are cascaded and displaced to form vacancies, interstitial atoms, and promote the segregation of solute atoms in the alloy to form atomic clusters and other material defects. The accumulation of a large number of vacancy defects will cause serious m...

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Problems solved by technology

During the long-term operation of nuclear reactors, due to the radiation of strong particles such as neutrons on the material, the material atoms are cascaded and displaced to form vacancies, interstitial atoms, and promote the segregation of solute atoms in the alloy to form atomic clusters and other material defects. The accumulation of a large number of vacancy defects will cause serious material swelling effects, which will affect the stability of the mechanical properties of structural materials, and eventually lead to material failure due to radiation-induced brittleness and other reasons, which poses a great threat to the safety of nuclear reactors and mobile nuclear power. Hidden dangers

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