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Austenitic stainless steel as well as preparation method thereof and application thereof

An austenitic stainless steel, mass percentage technology, applied in the field of austenitic stainless steel and its preparation, can solve the problems of the rise of irradiated DBTT, the corrosion and embrittlement of liquid lead and bismuth, and the difficulty of technical improvement, and achieves the removal of inclusions, microstructures and other problems. The effect of good stability, excellent resistance to lead and lead-bismuth liquid metal corrosion and radiation resistance

Active Publication Date: 2019-02-19
CHINA NUCLEAR POWER TECH RES INST CO LTD +4
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Although martensitic steel has geometric stability under strong irradiation environment, and the anti-irradiation dose can reach more than 200dpa, it has problems such as low high-temperature strength, liquid lead-bismuth corrosion embrittlement, increased DBTT of irradiation, and welding difficulties. It is difficult to improve and there is little experience to learn from

Method used

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  • Austenitic stainless steel as well as preparation method thereof and application thereof
  • Austenitic stainless steel as well as preparation method thereof and application thereof
  • Austenitic stainless steel as well as preparation method thereof and application thereof

Examples

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preparation example Construction

[0033] The preparation method of the austenitic stainless steel of the present invention can be obtained by adopting vacuum induction melting and vacuum arc consumable remelting process to obtain consumable remelted ingot, and then adopting the method of forging to obtain the ingot billet.

[0034] Specifically, the preparation method may include the following steps:

[0035] S1. Vacuum induction melting and vacuum arc consumable remelting are performed on raw materials of austenitic stainless steel to obtain consumable remelting ingots.

[0036] Step S1 may further include the following steps:

[0037] S1.1. Select polysilicon, nickel plate, pure iron, metal molybdenum strip, metal chromium, carbon, boron-iron alloy, metal manganese and sponge titanium as raw materials. Wherein, the mass percentage of the boron element in the boron-iron alloy is 15-20%.

[0038] Weigh each raw material according to the content of each component in the austenitic stainless steel.

[0039] S...

Embodiment 1-3

[0073] Table 4. Embodiment 1-3 alloy forging deformation process parameters

[0074]

[0075]

[0076] The chemical composition (%) of the austenitic stainless steel that table 5. embodiment 1-3 obtains

[0077]

[0078]

[0079] The austenitic stainless steel of Examples 1-3 was subjected to multi-pass cold rolling deformation and intermediate annealing treatment, and finally retained 20% of the cold deformation. The tensile properties of each example at room temperature, 450°C and 550°C are shown in Table 6 . The austenitic stainless steel components of the three examples all have relatively high strength and good plasticity, meeting the performance requirements of the present invention.

[0080] Table 6. Room temperature and medium temperature tensile properties of the austenitic stainless steels of Examples 1-3

[0081]

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Abstract

The invention discloses austenitic stainless steel as well as a preparation method thereof and application thereof. The austenitic stainless steel is prepared from the following components in percentage by mass: 0.04-0.08% of C, 16.5-20.0% of Cr, 14.5-16.5% of Ni, 1.0-3.0% of Si, 1.5-3.0% of Mn, 0.2-0.5% of Ti, 1.3-2.5% of Mo, 0.003-0.004% of B and the balance of iron. The austenitic stainless steel has a higher room temperature and medium-temperature tensile strength, is excellent in plasticity; alloy strength is improved after medium-temperature ageing treatment, plasticity is not obviouslyreduced, detrimental phase separation-out is avoided, and structure stability is good; and the austenitic stainless steel has excellent lead corrosion resistance and excellent lead-bismuth liquid-state metal corrosion resistance as well as excellent radiation resistance, and can meet material selection needs of lead-base fast reactor key parts better.

Description

technical field [0001] The invention relates to the technical field of nuclear fuel, in particular to an austenitic stainless steel and its preparation method and application. Background technique [0002] Lead-based reactor is one of the reference reactor types of the fourth generation nuclear energy system, and it is also the preferred reference reactor type of ADS. According to the "Technology Roadmap for Generation IV Nuclear Energy Systems" recently released by the Generation IV Nuclear Energy Systems International Forum (GIF), among all Generation IV nuclear energy systems, lead-cooled fast reactors are expected to be the first to achieve industrial demonstration and commercial application of nuclear energy. system. In view of the maturity of lead-based reactor technology, excellent characteristics and great application potential in the fields of fusion and fission, a large number of lead-based reactor engineering projects are also actively carried out internationally...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/58C22C38/34C22C38/50C22C38/44C22C38/54C22C33/06C21D8/00
CPCC21D8/005C21D2211/001C22C33/06C22C38/02C22C38/34C22C38/44C22C38/50C22C38/54C22C38/58
Inventor 易昊钰王旻石林马颖澈沈鑫查向东陈刘涛陈波邓勇军聂立红陈建新
Owner CHINA NUCLEAR POWER TECH RES INST CO LTD
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