Cr/CrAlN gradient coating technology of supercritical water-cooled reactor fuel can surface

Abstract

The invention belongs to the surface modification technology of a nuclear reactor structure material, and concretely relates to a Cr / CrAlN gradient coating technology of a supercritical water-cooled reactor fuel can surface. The technology comprises the steps of treating before plating, bias backwashing, arc ion reinforced reaction magnetron sputtering, sequential deposition of a Cr transition coating and a CrAlN gradient coating on the surface of an austenitic stainless steel matrix, and coating thermal treatment. The Cr / CrAlN gradient coating technology enables the oxidation resistant temperature of the Cr / CrAlN gradient coating to reach above 700DEG C, the hardness of the Cr / CrAlN gradient coating to reach above 2200Hv, the adhesion of the Cr / CrAlN gradient coating to reach above 35N, and the high temperature oxidation resistance, the combination force, the thermal shock resistance and the mechanical performances of the supercritical water-cooled reactor fuel can surface to be good, so the coordination and the unification of the structure and the functions of the surface coating are realized, thereby the use performances and the service life of the supercritical water-cooled reactor fuel are effectively improved.

Description

technical field [0001] The invention belongs to the surface modification technology of nuclear reactor structural materials, in particular to a Cr / CrAlN gradient coating process on the surface of supercritical water-cooled reactor fuel cladding. Background technique [0002] As an efficient, economical and durable energy source, nuclear power has significant advantages in solving the energy crisis facing the world and protecting the quality of the environment. The supercritical water-cooled reactor has the advantages of high thermal efficiency, simplified structure, good safety and good economy. Research on fuel cladding materials for supercritical water-cooled reactors is one of the keys to the research and development of supercritical water-cooled reactor technologies. It is necessary to develop fuel cladding materials with excellent performance under the coupling effects of high-temperature and high-pressure supercritical water and neutron irradiation. At present, low-sw...

AI Technical Summary

Problems solved by technology

[0004] Regarding the surface coating of supercritical water-cooled reactor cladding, the technology of depositing Cr / CrAlN gradient coating on the surface of supercritical water-cooled reactor fuel cladding has not been reported.