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Austenitic stainless steel cladding tube for lead-bismuth fast reactor and preparation method thereof

A technology of austenitic stainless steel and cladding tubes, applied in the field of nuclear materials, can solve the problems of large cladding tubes and increased difficulty in manufacturing austenitic stainless steel cladding tubes, so as to avoid corrosion, reduce thermal processing defects, The effect of high dimensional accuracy

Active Publication Date: 2017-03-22
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the size of the cladding tube of the lead-bismuth fast reactor is larger than that of the sodium-cooled fast reactor, and the ratio of diameter to wall thickness is larger, which increases the difficulty of manufacturing the austenitic stainless steel cladding tube. How to prepare such a cladding tube that requires high dimensional accuracy Products are also a key issue restricting the development of lead-bismuth fast reactors

Method used

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  • Austenitic stainless steel cladding tube for lead-bismuth fast reactor and preparation method thereof
  • Austenitic stainless steel cladding tube for lead-bismuth fast reactor and preparation method thereof
  • Austenitic stainless steel cladding tube for lead-bismuth fast reactor and preparation method thereof

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Embodiment 1

[0063] The specification of the lead-bismuth fast stack austenitic stainless steel cladding tube in this embodiment is Φ15×0.7 mm. The weight percentage of the chemical composition of the austenitic stainless steel cladding tube is:

[0064] C: 0.093%; Si: 0.64%; Ni: 15.46%; Cr: 14.90%; Ti: 0.38%; Mn: 1.68%; Mo: 1.28%; P: 0.02%; N: 0.01%; Avoid impurities.

[0065] The main preparation process is as follows:

[0066] (1) Vacuum induction smelting + vacuum consumable arc smelting is used to carry out double vacuum smelting, and the composition weight percentage of molten steel reaches the above ratio to tap out and cast ingots;

[0067] (2) Use a forging machine to forge an alloy ingot to obtain a billet, and finally obtain a round billet of Φ220 mm; after heating and insulating the billet, use a hot extrusion machine to extrude the billet with an extrusion ratio of 17.5 to obtain the specification It is a tube blank of Φ73×11mm; the tube blank is then subjected to solution ...

Embodiment 2

[0079] The specification of the lead-bismuth fast stack austenitic stainless steel cladding tube in this embodiment is Φ12×0.4 mm. The weight percentage of the chemical composition of the austenitic stainless steel cladding tube is:

[0080] C: 0.09%; Si: 0.56%; Ni: 15.05%; Cr: 15.10%; Ti: 0.41%; Mn: 1.90%; Mo: 1.34%; P: 0.02%; N: 0.01%; Avoid impurities.

[0081] The main preparation process is as follows:

[0082] (1) Vacuum induction smelting + vacuum consumable arc smelting is used to carry out double vacuum smelting, and the composition weight percentage of molten steel reaches the above ratio to tap out and cast ingots;

[0083] (2) Use a forging machine to forge an alloy ingot to obtain a billet, and finally obtain a round billet of Φ180 mm; after heating and insulating the billet, use a hot extrusion machine to extrude the billet with an extrusion ratio of 17.8 to obtain the specification It is a tube blank of Φ58×10mm; the tube blank is then subjected to solution t...

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Abstract

The invention discloses an austenitic stainless steel jacketing pipe for a lead-bismuth fast reactor and a preparation method of the austenitic stainless steel jacketing pipe. The austenitic stainless steel jacketing pipe comprises, by weight, 0.06%-0.1% of C, 0.5%-1.0% of Si, 14%-16% of Ni, 14%-16% of Cr, 0.3%-0.6% of Ti, 1.5%-2.0% of Mn, 1.2%-1.8% of Mo, smaller than or equal to 0.03% of P, smaller than or equal to 0.05% of Co, smaller than or equal to 0.05% of Al, smaller than or equal to 0.01% of B, smaller than or equal to 0.02% of N, and the balance Fe. The method for preparing the jacketing pipe through the materials includes the steps of smelting, forging, hot working, solution treatment, cold rolling and intermediate annealing, final heat treatment, final cold working, straightening, cleaning, finished product inspection, identification, packaging and the like. In the final heat treatment step, quenching is conducted in a high-pressure nitrogen cooling mode, and in the cleaning process, an acidic degreasing agent is prohibited.

Description

technical field [0001] The invention relates to an austenitic stainless steel cladding tube suitable for a lead-bismuth fast reactor fuel assembly and a preparation method thereof, belonging to the field of nuclear materials. Background technique [0002] Lead-bismuth cooled fast reactor is one of the six fourth-generation reactors, and it is also the main reactor type for accelerator-driven subcritical systems. According to the latest roadmap released by the Generation IV Nuclear Energy System International Forum (GIF) in 2014, the lead-based reactor is expected to become the first generation IV reactor type to obtain industrial demonstration. The cladding tube is an important barrier for the core, which can ensure the integrity of the fuel elements, prevent the escape of fission products, and isolate the coolant from the nuclear fuel. Therefore, the preparation technology of the fuel cladding tube is the key technology of the lead-bismuth fast reactor. [0003] Liquid lea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/58C22C38/54C22C38/52C22C38/50C21D8/10
Inventor 陈建伟吴庆生梅华平黄群英刘少军
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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