Corrosion-resistant nuclear zirconium alloy material and preparation method thereof

Abstract

The invention relates to the technical field of special alloy materials, and discloses a corrosion-resistant nuclear zirconium alloy material which comprises the following components including, by weight, 0.5%-1.2% of Sn, 0.2%-0.4% of Fe, 0.05%-0.25% of Cr, 0.05%-0.5% of Ta, 0.06%-0.16% of O and the balance Zr and other impurities. The invention further discloses a preparation method of the corrosion-resistant nuclear zirconium alloy material. According to the zirconium alloy material, the Ta element is added, so that the size of second-phase particles of the alloy material is refined, the distribution uniformity of the second-phase particles is improved, the development of irradiation defects is inhibited, nodular corrosion is inhibited, the creep resistance is improved, the sensitivity of the corrosion rate to dissolved oxygen in water is greatly reduced, the corrosion resistance in oxygen-containing water and deoxygenated water is remarkably improved, and the material can be used for boiling water reactors, advanced heavy water reactors or other specially-designed nuclear reactors.

Description

technical field [0001] The invention relates to the technical field of special alloy materials, in particular to a corrosion-resistant nuclear zirconium alloy material and a preparation method thereof. Background technique [0002] Due to its low thermal neutron absorption cross section, good corrosion resistance and moderate mechanical properties, zirconium alloy is currently the only fuel element shell material used in water-cooled nuclear reactors. The water-side corrosion resistance of zirconium alloys determines the service life of fuel elements in the reactor to a large extent, and has an important impact on the inherent safety and economics of nuclear reactors. The corrosion behavior of zirconium alloys is very sensitive to the water chemical conditions of the reactor primary circuit coolant. Different types of reactors have different requirements on the properties of zirconium alloys due to the differences in water chemical conditions. [0003] There are mainly two...

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Problems solved by technology

[0006] The first object of the present invention is to provide a kind of corrosion-resistant nuclear zirconium alloy material, to solve the problem that the existing high-performance zirconium alloy containing Nb element is not suitable for boiling water reactors , Advanced Heavy Water Reactor and other reactor types with high dissolved oxygen content in primary circuit water cannot meet the high burnup demand of nuclear fuel elements

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