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Regulation and control method for obtaining dispersed nano precipitated phase in FeCrAl alloy

A technology of nano-precipitated phases and alloys, which is applied in the control field of obtaining dispersed nano-precipitated phases to achieve excellent high-temperature structural stability, optimized and reliable technical solutions, and fixed process parameters.

Inactive Publication Date: 2019-07-09
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology

However, the FeCrAl alloy tends to form a coarse segregated second phase when it is cast and cooled, and it can exist stably in the temperature range below 1200°C, and it remains until the subsequent processing, and cannot be obtained by the final solution aging process. fine dispersed precipitated phase

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  • Regulation and control method for obtaining dispersed nano precipitated phase in FeCrAl alloy
  • Regulation and control method for obtaining dispersed nano precipitated phase in FeCrAl alloy
  • Regulation and control method for obtaining dispersed nano precipitated phase in FeCrAl alloy

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0021] According to the following technical scheme, the second phase in the FeCrAl alloy can be effectively regulated, and a new type of accident-resistant FeCrAl alloy material with a dispersed distribution of high-density nano-precipitated phases can be prepared.

[0022] FeCrAl alloy material, the material is characterized in that the main alloying elements are Cr, Al, Nb, Mo, etc. By weight percentage, Cr: 12.5-14.5%, Al: 3.5-5.5, Mo: 1.5-3%, Nb: 0.5-3%, C: not higher than 0.008%, N: not higher than 0.005%, O: not higher than 0.003%, and the balance is iron and other trace elements.

[0023] A control method for obtaining dispersed nano-precipitated phases in a FeCrAl alloy of the present invention, specifically comprising the following steps:

[0024] Step 1, solid solution of FeCrAl alloy material, get FeCrAl alloy material, carry out ...

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Abstract

The invention belongs to the field of nuclear fuel and material preparation processes and performance detection, and particularly relates to a regulation and control method for obtaining a dispersed nano precipitated phase in FeCrAl alloy. The regulation and control method specifically comprises the following steps: step 1, solid solution treatment of a FeCrAl alloy material: taking the FeCrAl alloy material, and carrying out high-temperature solid solution treatment on the FeCrAl alloy material; and secondly, hot working of the FeCrAl alloy after solid solution: using a hot rolling mill or anextruding machine for conducting hot working on the FeCrAl alloy plate obtained after solid solution. According to the FeCrAl alloy material prepared through the method, the microscopic structure characterization result shows that the regulated second phase is fine and dispersed, the average size is smaller than 200 nm, the matrix structure is stable after a high-temperature thermal stability test, and it is shown that the nano precipitated phase plays a good structure stabilizing role.

Description

technical field [0001] The invention belongs to the field of nuclear fuel and material preparation technology and performance testing, and in particular relates to a control method for obtaining dispersed nano-precipitated phases in FeCrAl alloys. Background technique [0002] After the Fukushima nuclear accident in Japan, improving the operational safety of nuclear power plants has become the goal pursued by all nuclear powers. At present, the research on accident-resistant nuclear fuel elements with excellent accident-resistant containment capability and their inherent safety has become a research hotspot in the international nuclear energy developed countries, and the research and evaluation of cladding materials with better performance has become the frontier and difficulty of accident-resistant fuel research. Driven by this strong demand background, FeCrAl alloy, which has excellent high-temperature performance, corrosion resistance and relatively mature industrial foun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/06C22C38/22C22C38/26C21D8/02
CPCC21D8/0226C22C38/001C22C38/002C22C38/004C22C38/06C22C38/22C22C38/26
Inventor 郑继云王辉张毅勇杜沛南贾玉振张瑞谦邱绍宇
Owner NUCLEAR POWER INSTITUTE OF CHINA
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