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Zirconium alloy

A zirconium alloy, weight percentage technology, applied in the field of zirconium alloys, can solve problems such as not meeting the requirements, achieve the effects of improving creep resistance, reducing hydrogen absorption, and improving high-temperature steam corrosion performance

Inactive Publication Date: 2020-04-07
FOSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most mature and widely used alloys are Zr-2 and Zr-4 alloys, but with the development of nuclear fuel assemblies in the direction of long life and high burnup, it is required that zirconium alloys as reactor structural materials must have better corrosion resistance , anti-creep, anti-radiation growth and other comprehensive properties, at this point Zr-2, Zr-4 alloys can no longer meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A zirconium alloy, the zirconium alloy comprises the following components in weight percentage: 1.7% of Nb, 1.0% of Sn, 0.07% of Cr, 0.06% of Ni, 0.1% of Ce, and the balance is Zr.

[0020] The preparation method of the above-mentioned zirconium alloy comprises the following steps:

[0021] (1) Proportioning raw materials according to the components of the zirconium alloy, then melting in a vacuum or an inert atmosphere environment, then pouring into a mold and air cooling to obtain a cast zirconium alloy;

[0022] (2) Hot-pressing the as-cast zirconium alloy obtained in step (1), the hot-pressing process is: preheating the as-cast zirconium alloy at a temperature of 660°C for 0.5h, and then hot-pressing it with a 230-280KN oil press Make zirconium alloy blanks twice, and then remove the oxide skin on the surface of zirconium alloy blanks;

[0023] (3) Then, the zirconium alloy that has completed step (2) hot-pressing treatment is subjected to homogenization treatment,...

Embodiment 2

[0027] A zirconium alloy comprises the following components in weight percentage: 1.4% of Nb, 0.7% of Sn, 0.05% of Cr, 0.06% of Ni, 0.02% of Ce, and the balance is Zr.

[0028] The preparation method of the above-mentioned zirconium alloy comprises the following steps:

[0029] (1) Proportioning raw materials according to the components of the zirconium alloy, then melting in a vacuum or an inert atmosphere environment, then pouring into a mold and air cooling to obtain a cast zirconium alloy;

[0030] (2) Hot-pressing the as-cast zirconium alloy obtained in step (1), the hot-pressing process is: preheating the as-cast zirconium alloy at a temperature of 660°C for 0.5h, and then hot-pressing it with a 230-280KN oil press Make zirconium alloy blanks twice, and then remove the oxide skin on the surface of zirconium alloy blanks;

[0031] (3) Then, the zirconium alloy that has completed step (2) hot-pressing treatment is subjected to homogenization treatment, and the homogenizat...

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PUM

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Abstract

The invention provides a zirconium alloy. The zirconium alloy comprises by weight 1.1%-2.1% of Nb, 0.2%-1.5% of Sn, 0.02%-0.1% of Cr, 0.01%-0.1% of Ni, 0.02%-0.1% of Ce and the balance of Zr. Nb is added into the zirconium alloy, and Nb is an alloy element which can improve corrosion resistance and mechanical property of the zirconium alloy; N is a harmful impurity element in the zirconium alloy due to the fact that N3- can replace oxygen ions in oxide crystal lattices and generate additional vacancy, after Sn is added into the zirconium alloy, N3- and oxygen ion vacancy attempt to be reservednear Sn3+; ions, and mobility is poor after the three components are combined, so that vacancy mobility is reduced, and Sn can counteract harmful effects of N and improve corrosion resistance; Cr andNi are further added into the zirconium alloy, Cr can effectively improve the creep resistance of the high alloy, and Ni can effectively improve the high-temperature steam corrosion resistance of thehigh alloy.

Description

technical field [0001] The invention belongs to the technical field of metal materials, in particular to a zirconium alloy. Background technique [0002] Zirconium alloys have good corrosion resistance, moderate mechanical properties, low atomic thermal neutron absorption cross section in high temperature and high pressure water and steam, good compatibility with nuclear fuel, and excellent resistance to various acids, alkalis and salts. In addition, it has good welding performance and plasticity, so zirconium alloys are widely used as cladding materials for fuel rods and structural elements of nuclear reactor cores. [0003] With the development of nuclear power reactor technology in the direction of increasing fuel consumption, reducing fuel cycle costs, increasing reactor efficiency, and improving safety and reliability, the corrosion resistance, hydrogen absorption performance, and Higher requirements are put forward for mechanical properties and radiation dimensional s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C16/00C22F1/18C22F1/02
CPCC22C16/00C22F1/02C22F1/186
Inventor 孙海波
Owner FOSHAN UNIVERSITY
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