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Nano-structure low-activation martensitic steel and preparation method thereof

A nano-structured martensitic steel technology, applied in the field of metal materials, can solve the problems of low activation steel preparation cost, increase, inability to fully exert the effect of Ti precipitation strengthening, etc., and achieve the effect of avoiding comprehensive mechanical properties and avoiding a sharp increase

Active Publication Date: 2020-08-28
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Description
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  • Application Information

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Problems solved by technology

"A preparation method of nano-precipitation-strengthened radiation-resistant low-activation steel (CN 109594009 A)" published by a Chinese patent, first prepares a FeTaC master alloy, and then adds the FeTaC alloy to the steel. The preparation of the master alloy improves the Preparation cost of low activation steel
At the same time, it adopts the conventional heat treatment process of Ta-containing low-activation steel, which cannot fully exert the precipitation strengthening effect of Ti.

Method used

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  • Nano-structure low-activation martensitic steel and preparation method thereof
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preparation example Construction

[0037] The preparation method of nanostructure low-activation martensitic steel of the present invention, it comprises the following steps:

[0038] (1) Preparation of consumable electrodes

[0039] Dosing and melting are carried out according to the low activation steel composition. Put Fe, Cr, W and C in a vacuum induction furnace for smelting, and then refine after the alloy is melted. The refining time is 50-70min, the refining temperature is 1600-1610°C, and the vacuum degree is 10-20Pa. After refining, reduce the power of the induction furnace to reduce the temperature of the alloy liquid to 1540-1550 °C, and add the remaining alloys from the alloy silo to the alloy liquid in the following order: Si→Mn→V→Ti, with a time interval of 1-1.5 minutes. After all the alloys are melted, nitrogen gas is introduced into the induction furnace to keep the pressure in the induction furnace at 2000-4000Pa, and the casting is carried out under nitrogen environment, and the casting te...

Embodiment 1

[0049] In the nanostructured low-activation martensitic steel of this embodiment, in terms of mass percentage, the contents of each component are: C 0.1%, Si 0.1%, Mn 0.45%, Cr 9.0%, W 1.45%, V 0.20% , Ti 0.015%, N 0.0075%, and the balance is Fe.

[0050] The preparation process of the nanostructured low-activation martensitic steel in this embodiment includes the following steps:

[0051] (1) Preparation of consumable electrodes

[0052] Dosing and melting are carried out according to the low activation steel composition. Put Fe, Cr, W and C in a vacuum induction furnace for smelting, and then refine after the alloy is melted. The refining time is 60min, the refining temperature is 1605-1610°C, and the vacuum degree is 10-15Pa. After refining, reduce the power of the induction furnace to reduce the temperature of the alloy liquid to 1545-1550 °C, and add the remaining alloys from the alloy silo to the alloy liquid in the following order: Si→Mn→V→Ti, with a time interval of...

Embodiment 2

[0063] In the nanostructured low-activation martensitic steel of this embodiment, the content of each component is: C 0.12%, Si 0.2%, Mn 0.4%, Cr 9.5%, W 1.0%, V 0.18% by mass percentage , Ti 0.01%, N 0.01%, and the balance is Fe.

[0064] The preparation process of the nanostructured low-activation martensitic steel in this embodiment includes the following steps:

[0065] (1) Preparation of consumable electrodes

[0066] Dosing and melting are carried out according to the low activation steel composition. Put Fe, Cr, W and C in a vacuum induction furnace for smelting, and then refine after the alloy is melted. The refining time is 60min, the refining temperature is 1600-1605°C, and the vacuum degree is 10-15Pa. After refining, reduce the power of the induction furnace to reduce the temperature of the alloy liquid to 1545-1550°C, and add the remaining alloys from the alloy silo to the alloy liquid in the following order: Si→Mn→V→Ti, with a time interval of 1min. After all...

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Abstract

The invention discloses nano-structure low-activation martensitic steel and a preparation method thereof. The nano-structure low-activation martensitic steel comprises the following chemical elementsof, in percentage by mass, 0.08%-0.012% of C, 0.1%-0.25% of Si, 0.4%-0.5% of Mn, 8.5%-9.5% of Cr, 1%-1.5% of W, 0.18%-0.22% of V, 0.01%-0.05% of Ti, 0.0050%-0.01% of N, and the balance Fe. The preparation process comprises the steps of consumable electrode preparation, protective electroslag remelting refining, high-temperature forging, medium-temperature rolling and microstructure shaping heat treatment. According to the nano-structure low-activation martensitic steel and the preparation method thereof, and the use performance of the low-activation steel structure material can be improved.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a nanostructure low-activation martensitic steel and a preparation method thereof. Background technique [0002] As a kind of clean energy, nuclear fusion reactor has great strategic significance in ensuring energy security, coping with global climate change and environmental pollution, and has become a hot research topic at home and abroad. Since the working environment in the fusion reactor is far harsher than that of the fission reactor, the temperature in the reactor is higher, the pressure is higher, and the neutron irradiation intensity is greater, so higher requirements are put forward for the materials of the fusion reactor. The development of high-performance structural materials has become the key to the commercial application of fusion reactors. [0003] At the beginning of the fusion reactor design, the concept of "low activation material" was int...

Claims

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Application Information

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IPC IPC(8): C22C38/22C22C38/24C22C38/28C22C38/02C22C38/04C22C33/04C21D8/02
CPCC21D8/0205C21D8/0247C21D2211/008C22C33/04C22C38/001C22C38/02C22C38/04C22C38/22C22C38/24C22C38/28
Inventor 邱国兴
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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