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Corrosion-resistant zirconium alloy

A zirconium alloy, corrosion-resistant technology, applied in the field of corrosion-resistant zirconium alloys, can solve the problems of high coolant temperature, increased cladding corrosion load, high fuel consumption, etc., to improve corrosion resistance, prevent corrosion, and chemically stable. Effect

Inactive Publication Date: 2020-03-24
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 the economy requires that the operation of nuclear power plants have higher coolant temperature, higher fuel consumption, higher lithium concentration in the coolant, and more Long cycles and longer in-core dwell times, these conditions lead to increased corrosion load on the cladding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A corrosion-resistant zirconium alloy, comprising the following components in weight percentage: 2.9% Nb, 1.3% Sn, 1.0% Cr, 0.01% Fe, 0.03% Ce, 0.04% Y, and the balance is Zr.

[0019] The preparation method of the above-mentioned corrosion-resistant zirconium alloy comprises the following steps:

[0020] (1) Proportioning raw materials according to the components of the corrosion-resistant zirconium alloy, then melting in a vacuum or an inert atmosphere environment, and then pouring into a mold and air-cooling to obtain a cast corrosion-resistant zirconium alloy;

[0021] (2) Then homogenize the as-cast corrosion-resistant zirconium alloy: uniformly post-treat the as-cast corrosion-resistant zirconium alloy blank at 1050°C for 30 minutes in a vacuum or inert atmosphere, and then air-cool;

[0022] (3) The corrosion-resistant zirconium alloy that has completed the homogenization treatment of step (2) is subjected to multi-pass rolling treatment: the corrosion-resistant ...

Embodiment 2

[0025] A corrosion-resistant zirconium alloy, comprising the following components in weight percentage: 3.6% of Nb, 2.0% of Sn, 1.0% of Cr, 0.05% of Fe, 0.05% of Ce, 0.05% of Y, and the balance is Zr.

[0026] The preparation method of the above-mentioned corrosion-resistant zirconium alloy comprises the following steps:

[0027] (1) Proportioning raw materials according to the components of the corrosion-resistant zirconium alloy, then melting in a vacuum or an inert atmosphere environment, and then pouring into a mold and air-cooling to obtain a cast corrosion-resistant zirconium alloy;

[0028] (2) Then homogenize the as-cast corrosion-resistant zirconium alloy: uniformly post-treat the as-cast corrosion-resistant zirconium alloy blank at 1050°C for 30 minutes in a vacuum or inert atmosphere, and then air-cool;

[0029] (3) The corrosion-resistant zirconium alloy that has completed the homogenization treatment of step (2) is subjected to multi-pass rolling treatment: the co...

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PUM

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Abstract

The invention provides a corrosion-resistant zirconium alloy. The corrosion-resistant zirconium alloy comprises the following components in percentage by weight: 2.4%-4.5% of Nb, 0.5%-2.1% of Sn, 0.5%-1.3% of Cr, 0.01%-0.1% of Fe, 0.02%-0.1% of Ce, 0.03%-0.1% of Y and the balance of Zr. Nb is added into the corrosion-resistant zirconium alloy disclosed by the invention, Nb serves as a corrosion-resistant element, a passivation film containing Nb2O5 can be generated on the surface of the alloy in the environment containing a corrosion medium, the chemical property of Nb2O5 is stable, the microcosmic uniformity of the passivation film can be effectively improved, and ions in the corrosion medium are prevented from further corroding the interior of the alloy; rare earth elements are added into the corrosion-resistant zirconium alloy, so that the corrosion resistance of the zirconium alloy in a lithium hydroxide solution can be remarkably improved, and the good mechanical property of the corrosion-resistant zirconium alloy is also ensured.

Description

technical field [0001] The invention belongs to the technical field of metal materials, in particular to a corrosion-resistant 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 rad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C16/00C22C1/02C22F1/18C22F1/02
CPCC22C1/02C22C16/00C22F1/02C22F1/186
Inventor 孙海波
Owner FOSHAN UNIVERSITY
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