Composite structural material and process for manufacturing pipeline component using same

Abstract

The invention belongs to the field of composite material, and in particular relates to a composite structural material and a process for manufacturing a pipeline component using the same. The composite structural material is characterized by adopting a double-layer structure, wherein one layer is made of vanadium alloy material, and the other layer is made of low-activity martensite steel material. In practical application, the side in contact with liquid alkali metal is made of vanadium alloy, and the side in contact with the environment gas or other cooling agents is made of low-activity martensite steel. In the composite structural material provided by the invention, respective advantages of the vanadium alloy and low-activity martensite steel in the application to the sodium cooled fast reactor and fusion reactor liquid metal are sufficiently used, and the problems of neutron irradiation resistance and liquid metal corrosion resistance can be effectively solved. Through the manufacturing process provided by the invention, the utilization rate of material can be obviously improved, and the processing cycle can be remarkably shortened.

Description

technical field [0001] The invention relates to a composite material and a process for preparing pipelines based on the composite material, in particular to a composite structural material suitable for sodium-cooled fast reactors and fusion liquid metal cladding and a process for preparing pipeline components using the material. Background technique [0002] According to my country's nuclear energy development strategy, fast reactors and fusion reactors will become the direction of my country's nuclear energy system technology development in the future. Among them, the sodium-cooled fast reactor is the preferred concept among various fast reactor concepts, but the choice of its structural material must consider the compatibility with liquid metal sodium. At present, China's fusion reactor design intends to use helium-cooled solid-state tritium breeding cladding or dual-function liquid metal cladding to achieve tritium self-sustainability. In the fusion liquid metal cladding,...

AI Technical Summary

Problems solved by technology

However, the application of vanadium alloys faces a very serious engineering problem, that is, it is too sensitive to oxygen. For example, in the fusion liquid double-cooled cladding, even if high-purity helium is used as the coolant, the oxygen content in the helium must be controlled at ppb (parts per billion) level, otherwise the oxygen in the high-purity helium will continuously corrode the vanadium alloy, affect the safety of the reactor, and cannot meet the needs of long-term operation of commercial reactors

[0004] The low-activity ferritic / martensitic steel is not sensitive to oxygen, and has good compatibility with helium and water under high temperature and high pressure environments, but has poor compatibility with liquid alkali metals, and the liquid state The corrosion of metal to low-activity ferritic / martensitic steel will be significantly deepened with the increase of the flow rate of liquid metal, and the coolant effectiveness of liquid metal depends on the flow rate itself. Applications in liquid metal cladding for cold fast and fusion reactors pose limitations