Zirconium alloy surface nitriding and ion-plating composite coating and preparation method thereof

A technology of surface nitriding and composite coating, which is applied in the field of material science, can solve the problems that zirconium alloy materials cannot meet the requirements of working conditions, and achieve the goal of improving high-temperature oxidation resistance, reducing high-temperature oxidation rate, and improving strength and oxidation resistance. Effect

Inactive Publication Date: 2019-01-15
STATE POWER INVESTMENT CORP RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing zirconium alloy materials are still not up to the harsh working conditions

Method used

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  • Zirconium alloy surface nitriding and ion-plating composite coating and preparation method thereof
  • Zirconium alloy surface nitriding and ion-plating composite coating and preparation method thereof
  • Zirconium alloy surface nitriding and ion-plating composite coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] refer to figure 2 According to the following steps, carry out surface nitriding and ion plating composite coating on the zirconium alloy:

[0054] (1) carry out surface pretreatment with zirconium substrate;

[0055] (2) carrying out nitrocarburizing treatment to the zirconium substrate obtained in step (1);

[0056] Soft nitriding process parameters: nitriding temperature 590±10°C, nitriding time 360min, ammonia gas flow rate 1500-2000L / min, methanol dripping amount 7-8mL / min, cooling medium is anti-rust water;

[0057] (3) forming a Cr transition coating on the surface of the zirconium base material gained in step (2);

[0058] Cr transition coating coating process parameters are: bias voltage -200V, current 65A, air pressure 1.2Pa, temperature 380°C;

[0059] (4) Form a TiAlSiN working coating on the surface of the Cr transition coating;

[0060] Coating process parameters of TiAlSiN working coating: bias voltage -100V, current 60A, air pressure 2.2Pa, temperatu...

Embodiment 2

[0062] refer to figure 2 According to the following steps, carry out surface nitriding and ion plating composite coating on the zirconium alloy:

[0063] (1) carry out surface pretreatment with zirconium substrate;

[0064] (2) carrying out nitrocarburizing treatment to the zirconium substrate obtained in step (1);

[0065] Soft nitriding process parameters: nitriding temperature 590±10°C, nitriding time 360min, ammonia gas flow rate 1500-2000L / min, methanol dripping amount 7-8mL / min, cooling medium is anti-rust water;

[0066] (3) forming a Cr transition coating on the surface of the zirconium base material gained in step (2);

[0067] Cr transition coating coating process parameters are: bias voltage -200v, current 65A, air pressure 1.2Pa, temperature 400°C;

[0068] (4) Form a TiAlSiN working coating on the surface of the Cr transition coating;

[0069] Coating process parameters of TiAlSiN working coating: bias voltage -100v, voltage 60A, air pressure 2.2Pa, temperatu...

Embodiment 3

[0071] Investigate the application of zirconium alloy surface nitriding and ion plating composite coating (base material / nitridation / chromium / TiAlSiN composite coating) and existing base material / TiAlSiN coating, base material / nitridation / TiAlSiN coating Film-base adhesion performance, the instrument uses WS-2005 coating adhesion automatic scratch tester. the result shows:

[0072] (1) if image 3 As shown, the friction acoustic signal diagram of the zirconium alloy surface nitriding and ion plating composite coating scratch test of the present application, the friction force at the first peak position of the acoustic signal is the coating bonding force, which is 38N;

[0073] (2) if Figure 4~5 As shown, the substrate / TiAlSiN coating prepared under different process conditions has a coating-film-substrate bonding force of 23-32N;

[0074] (3) if Figure 6~7 As shown, the substrate / nitridation / TiAlSiN coating prepared under different process conditions has a film-base bond...

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Abstract

The invention discloses a zirconium alloy surface nitriding and ion-plating composite coating preparation technology. A method for preparing a zirconium alloy surface nitriding and ion-plating composite coating comprises the steps that (1), surface pretreatment is performed on a zirconium base material; (2), soft nitriding treatment is performed on the zirconium base material obtained in the step(1); (3), a Cr transition coating is formed on the surface of the zirconium base material obtained in the step(2); and (4), a TiAlSiN working coating is formed on the surface of the Cr transition coating to conveniently obtain the composite coating. According to the zirconium alloy surface nitriding and ion-plating composite coating preparation method, by means of the manners that the soft nitriding treatment is performed on the zirconium alloy surface and the composite coating of the Cr transition coating and the TiAlSiN working coating is formed on the zirconium alloy surface, the high-temperature oxidation resistance and the membrane adhesion of zirconium alloy can be significantly improved.

Description

technical field [0001] The invention relates to the field of material science, in particular to a zirconium alloy surface nitriding and ion plating composite coating and a preparation method thereof. Background technique [0002] Zirconium alloys are widely used in nuclear reactor materials because of their good comprehensive properties. Among all core structural materials, the working conditions of the nuclear fuel cladding tube are the most severe. The nuclear fuel cladding tube is in the nuclear fission reaction of the nuclear reactor, and the nuclear energy is converted into heat energy. At the same time, it is to prevent the radioactive fission products from escaping outwards. The first barrier to withstand the test of high temperature, oxidation, corrosion, erosion, radiation environment. The hydrogen produced under the action of corrosion reaction and radiation and the hydrogen in the cladding of fuel elements may lead to hydrogen absorption and embrittlement of nucl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/32C23C14/06C23C14/16C23C8/24C23C28/00
CPCC23C8/24C23C14/0641C23C14/16C23C14/325C23C28/322C23C28/34
Inventor 李怀林刘艳红樊湘芳邱长军王晓婧周军李涛夏海鸿
Owner STATE POWER INVESTMENT CORP RES INST
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