Novel Cr-Y-O nanocluster oxide dispersion strengthening reduced activation steel

Abstract

The invention aims to provide novel Cr-Y-O nanocluster oxide dispersion strengthening reduced activation steel applicable to a fusion reactor. According to the composition proportion of the oxide dispersion strengthening reduced activation steel, Fe serves as a substrate; C is larger than or equal to 0.04% and smaller than or equal to 0.14%; Cr is larger than or equal to 10.0% and smaller than or equal to 14.0%; W is larger than or equal to 1.1% and smaller than or equal to 1.50%; V is larger than or equal to 0.15% and smaller than or equal to 0.35%; Ta is larger than or equal to 0.03% and smaller than or equal to 0.19%; Mn is larger than or equal to 0.2% and smaller than or equal to 0.6%; Si is larger than or equal to 0.05% and smaller than or equal to 0.15%; Y is larger than or equal to 0.20% and smaller than or equal to 0.75%; a small quantity of impurities are unavoidably mixed in the manufacturing process. The contents of impurity elements and easily activating elements which can generate radionuclides after neutron irradiation are strictly controlled, wherein N is smaller than 0.010%; Al is smaller than 0.010%; Ni is smaller than 0.005%; Mo is smaller than 0.005%; Nb is smaller than 0.010%; Cu is smaller than 0.010%; P is smaller than 0.005%; S is smaller than 0.005%. The oxide dispersion strengthening reduced activation steel is uniform in structure, oxide nanocluster is in dispersion distribution, the excellent mechanical properties are achieved, and moreover the low activation property and the good irradiation swelling resistance are also achieved.

Description

technical field [0001] The invention belongs to the field of radiation-resistant metal materials, in particular to an oxide dispersion-strengthened low-activation steel for fusion reactors, which can resist strong neutron radiation and has excellent mechanical properties. Background technique [0002] China currently consumes 47-50 trillion kilowatt-hours of electricity per year. If all electricity is produced by supercritical thermal power units, the annual coal consumption will be 14-18 billion tons, which is very important for my country's coal resources and natural environment. huge challenge. Therefore, from the perspectives of environment and energy, it is imperative to develop nuclear energy. In the process of nuclear fusion power generation, not only can zero pollution discharge be achieved, but also the energy conversion rate is high and the power generation efficiency is high. However, whether the fusion reactor can be successfully built and run smoothly depends o...

AI Technical Summary

Problems solved by technology

[0004] Currently, this direct addition of lazy Y 2 o 3 There is a big weakness in the method of preparing oxide dispersion strengthened low-activation steel by particles, that is, the oxygen content in the oxide dispersion strengthened low-activation steel matrix cannot be effectively controlled

During the preparation of oxide dispersion strengthened low-activation steel, although the original alloy powder and the mixed powder after ball milling are stored in a vacuum glove box to isolate the air to prevent oxidation, the mixed powder is often exposed to the In the air, the specific surface area of ​​powder particles is large, and the gas is easily adsorbed on the surface of powder particles

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