Corrosion-resistant high-strength neutron shielding alloy material and preparation method thereof

An alloy material and high-strength technology, which is applied in the field of high-strength neutron shielding alloy materials and their preparation, can solve the problems that the mechanical properties cannot meet the requirements of nuclear chemical equipment manufacturing and corrosion resistance, and achieve excellent neutron shielding. performance, improving comprehensive mechanical properties, and the effect of excellent strength

Active Publication Date: 2021-01-08
西安稀有金属材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, on the one hand, these materials cannot meet the corrosion resistance requirements in strong corrosive environments such as boiling nitric acid. In addition, compared with metals or alloys, they cannot meet the manufacturing requirements of nuclear chemical equipment such as nuclear spent fuel reprocessing in terms of mechanical properties.

Method used

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  • Corrosion-resistant high-strength neutron shielding alloy material and preparation method thereof
  • Corrosion-resistant high-strength neutron shielding alloy material and preparation method thereof
  • Corrosion-resistant high-strength neutron shielding alloy material and preparation method thereof

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Embodiment 1

[0030] The alloy material of this embodiment is composed of the following elements by mass percentage: Hf 50%, and the balance is Zr and inevitable impurities.

[0031] The alloy material preparation method of the present embodiment includes the following steps:

[0032] Step 1: Mixing sponge zirconium and sponge hafnium, then pressing to obtain an electrode block, and then subjecting the obtained electrode block to vacuum consumable electrode smelting to obtain an alloy ingot; the sponge zirconium is in line with YS / T 397- 2015 standard industrial-grade zirconium sponge, the hafnium sponge is industrial-grade hafnium sponge that meets the YS / T399-2013 standard;

[0033] In step 2, the alloy ingot obtained in step 1 is subjected to mechanical processing and chamfering in turn, and then the alloy ingot after chamfering is subjected to three-fire forging to obtain an alloy ingot after forging; the three-fire forging is performed for three times. The conditions are: upsetting 3 ...

Embodiment 2

[0042] The alloy material of this embodiment is composed of the following elements in mass percentage: Hf 49%, and the balance is Zr and unavoidable impurities.

[0043] The alloy material preparation method of the present embodiment includes the following steps:

[0044] Step 1: Mixing sponge zirconium and sponge hafnium, then pressing to obtain an electrode block, and then subjecting the obtained electrode block to vacuum consumable electrode smelting to obtain an alloy ingot; the sponge zirconium is in line with YS / T 397- 2015 standard industrial-grade zirconium sponge, the hafnium sponge is industrial-grade hafnium sponge that meets the YS / T399-2013 standard;

[0045] In step 2, the alloy ingot obtained in step 1 is subjected to mechanical processing and chamfering in turn, and then the alloy ingot after chamfering is subjected to three-fire forging to obtain an alloy ingot after forging; the three-fire forging is performed for three times. The conditions are: upsetting t...

Embodiment 3

[0050] The alloy material of this embodiment consists of the following elements in mass percentage: Hf 51%, and the balance is Zr and unavoidable impurities.

[0051] The alloy material preparation method of the present embodiment includes the following steps:

[0052] Step 1: Mixing sponge zirconium and sponge hafnium, then pressing to obtain an electrode block, and then subjecting the obtained electrode block to vacuum consumable electrode smelting to obtain an alloy ingot; the sponge zirconium is in line with YS / T 397- 2015 standard industrial-grade zirconium sponge, the hafnium sponge is industrial-grade hafnium sponge that meets the YS / T399-2013 standard;

[0053] In step 2, the alloy ingot obtained in step 1 is subjected to mechanical processing and chamfering in turn, and then the alloy ingot after chamfering is subjected to three-fire forging to obtain an alloy ingot after forging; the three-fire forging is performed for three times. The conditions are: upsetting 3 ti...

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Abstract

The invention discloses a corrosion-resistant high-strength neutron shielding alloy material which is composed of the following elements including, by mass, 49%-51% of Hf and the balance Zr and inevitable impurities. The invention also provides a preparation method of the corrosion-resistant high-strength neutron shielding alloy material. The method comprises the following steps of mixing sponge zirconium and sponge hafnium, conducting pressing and vacuum consumable electrode smelting to obtain an alloy cast ingot, sequentially machining and chamfering the alloy cast ingot, carrying out three-heating-number forging to obtain a forged alloy ingot, carrying out heat treatment on the forged alloy ingot, and cooling to obtain the alloy material. According to the corrosion-resistant high-strength neutron shielding alloy material and the preparation method, the Zr serves as a matrix, the Hf serves as a main alloy element, the alloy material is prepared through vacuum consumable electrode smelting and three-heating-number forging, and the prepared alloy material is single in phase and uniform in structure, has excellent neutron shielding performance and strength and meanwhile has extremely high corrosion resistance and machinable performance.

Description

technical field [0001] The invention belongs to the technical field of metal materials, and in particular relates to a corrosion-resistant high-strength neutron shielding alloy material and a preparation method thereof. Background technique [0002] After the nuclear fuel is bombarded by neutrons in the reactor, the nuclear reaction occurs, and the burn-up depth reaches the unloading standard, which must be unloaded from the reactor and become spent fuel. Spent fuel still contains a large amount of unused value-added nuclides, fissile nuclides and other fission products, and has extremely strong radioactivity, which is difficult and costly to handle. Corrosion-resistant materials for nuclear chemical industry such as nuclear spent fuel reprocessing are the first barrier to prevent corrosive and radioactive substances from entering the environment, and are the basic prerequisite for the safe operation of nuclear chemical equipment such as reprocessing. [0003] Due to its ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C16/00C22C27/00C22C1/02C22F1/18C21D1/30B21J5/00
CPCB21J5/002C21D1/30C22C1/02C22C16/00C22C27/00C22F1/18C22F1/186
Inventor 刘承泽吴金平潘晓龙赵彬李欢徐建平吴俊宇张于胜
Owner 西安稀有金属材料研究院有限公司
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