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

A gradient coating, fuel cladding technology, applied in metal material coating process, coating, ion implantation plating, etc., can solve the problem of Cr/CrAlN gradient coating technology that has not been reported, and achieve excellent interface bonding performance , Good radiation resistance effect, excellent high temperature corrosion resistance effect

Inactive Publication Date: 2012-11-21
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology

[0004] Regarding the surface coating of supercritical water-cooled reactor cladding, the technology of depositing

Method used

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Embodiment Construction

[0019] The supercritical water-cooled reactor fuel cladding substrate used in the coating process of the present invention is D9, 1.4970, 316Ti austenitic stainless steel.

[0020] The specific steps of the Cr / CrAlN gradient coating process on the supercritical water-cooled reactor fuel cladding surface (high temperature oxidation resistance) of the present invention are as follows:

[0021] 1. Pre-plating treatment

[0022] Grind and polish the substrate with metallographic sandpaper of 300 mesh to 1000 mesh, and then place the substrate in an ultrasonic container for degreasing cleaning. The cleaning solution is sodium carbonate 150g / L, sodium citrate 50g / L, and active agent 3g / L, sodium phosphate 40g / L; after pickling and rinsing with deionized water, dry in a vacuum drying furnace, and then place the dried substrate in a vacuum furnace of an arc ion enhanced reaction magnetron sputtering equipment for plasma reaction Splash cleaning, backsplash cleaning parameters are: b...

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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...

Claims

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Application Information

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IPC IPC(8): C23C14/35C23C14/58C23C14/54C23C14/16C23C14/06
Inventor 唐睿潘钱付刘睿睿刘超红易伟杨勇飞杨晓雪
Owner NUCLEAR POWER INSTITUTE OF CHINA
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