FeCrAl base alloy for nuclear reactor core and preparing method of alloy

Abstract

The invention discloses a FeCrAl base alloy for a nuclear reactor core and a preparing method of the alloy. The problem that high-temperature oxidation resistance performance, toughness and high-temperature resistance strength of a FeCrAl base alloy material in the prior art cannot effectively meet the performance requirement of the nuclear reactor core is solved. The alloy comprises 12.5 to 14.5 wt% of Cr, 3.5 to 5.5 wt% of Al, 1.5 to 3 wt% of Mo, 1 to 3 wt% of Nb, 0.1 to 0.3 wt% of Si, 0.1 to 0.2 wt% of Ta, 0.1 to 0.2 wt% of Hf, 0 to 0.2 wt% of Ga, 0.1 to 0.2 wt% of Ni, 0.05 to 0.1 wt% of Ce, not larger than 0.008 wt% of C, not larger than 0.005 wt% of N, not larger than 0.003 wt% of O, and the balance Fe and inevitable impurities. The alloy has the excellent high-temperature oxidation resistance performance, heat stability, mechanical property and the like.

Description

technical field [0001] The invention relates to the technical field of iron-based alloy structural materials and special alloy materials, in particular to a FeCrAl-based alloy for nuclear reactor cores, and discloses a preparation method of the FeCrAl-based alloy. Background technique [0002] After the Fukushima nuclear accident in Japan, it is required that the fuel element cladding materials for the next generation and future advanced nuclear power water reactors must have better resistance to high-temperature water vapor oxidation, high-temperature strength and High temperature stability, which can provide a greater safety margin and avoid potential core melting accidents, also known as accident-resistant cladding materials. The research shows that the FeCrAl alloy containing appropriate amounts of Cr, Al, and Si has good radiation resistance and high temperature oxidation resistance, making it a very potential cladding material in the research and development of acciden...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the high-temperature oxidation resistance, toughness and high-temperature resistance strength of the FeCrAl-based alloy materials in the prior art cannot effectively meet the performance requirements of the nuclear reactor core, and the purpose is to provide a nuclear reactor core Using FeCrAl-based alloy and its preparation method to ensure high toughness and high temperature resistance strength while effectively ensuring significant high temperature oxidation resistance

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