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A kind of hafnium corrosion plate type monitoring sample and preparation method thereof

A plate type and ingot casting technology, applied in the field of hafnium processing, can solve the problems of large deviation of chemical composition, low production efficiency, inability to achieve uniformity, etc., and achieve the effect of small deviation in size, improvement of consistency, and control of grain size.

Active Publication Date: 2022-05-27
西安诺博尔稀贵金属材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The traditional manufacturing method of the hafnium corrosion monitoring sample is mainly a single electron beam melting without physical stirring with forging and rolling process routes. The disadvantages of the traditional manufacturing method are as follows: First, single electron beam melting without physical stirring Compared with the method of three times of electron beam melting and physical stirring, the chemical composition of each part of the ingot has a large deviation, which cannot meet the uniformity requirements.
Second, cold rolling of metal hafnium has coarser grains (not easy to refine) than hot rolling. Due to the anisotropy of the metal, the coarse grains have a certain impact on the stability of corrosion; therefore, hot rolling is combined with surface finishing It can ensure the fineness of the grains, ensure the stability of the corrosion results and greatly improve the surface accuracy; third, the traditional manufacturing method has no special tooling, and it is difficult to punch holes for the finished product monitoring sample and the production efficiency is low.

Method used

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  • A kind of hafnium corrosion plate type monitoring sample and preparation method thereof
  • A kind of hafnium corrosion plate type monitoring sample and preparation method thereof
  • A kind of hafnium corrosion plate type monitoring sample and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0048] The thickness of the hafnium corrosion plate type monitoring sample in this embodiment is 3.01mm, the width is 19.95mm, the length is 30.05mm, the aperture is 2.2mm, the grain size grade is ≥10, and the grain size grade is in accordance with the "GB / T6394 Metal Average Grain Size" Particle size determination method" to determine;

[0049]The mass percentage content of zirconium in the hafnium corrosion plate type monitoring sample is 0.10% to 0.12%, the mass percentage content of nitrogen is 0.001% to 0.002%, the mass percentage content of hydrogen is 0.003% to 0.004%, and the mass percentage of oxygen is 0.003% to 0.004%. The mass percentage is 0.002% to 0.004%.

[0050] The preparation method of the hafnium corrosion plate type monitoring sample of the present embodiment comprises the following steps:

[0051] Step 1: Process a plurality of hafnium crystal bars with a diameter of 25 mm to 35 mm into hafnium electrodes with a cross-sectional diameter smaller than the ...

Embodiment 2

[0066] The thickness of the hafnium corrosion plate type monitoring sample in this embodiment is 3.00mm, the width is 19.9mm, the length is 29.9mm, the aperture is 2.2mm, the grain size level is ≥10, and the grain size level is in accordance with "GB / T6394 Metal Average Grain Particle size determination method" to determine;

[0067] The mass percentage content of zirconium in the hafnium corrosion plate type monitoring sample is 0.13% to 0.15%, the mass percentage content of nitrogen is 0.001% to 0.002%, the mass percentage content of hydrogen is 0.004% to 0.005%, and the mass percentage of oxygen is 0.004% to 0.005%. The mass percentage is 0.004% to 0.006%.

[0068] The preparation method of the hafnium corrosion plate type monitoring sample of the present embodiment comprises the following steps:

[0069] Step 1: Process a plurality of hafnium crystal bars with a diameter of 25 mm to 35 mm into hafnium electrodes with a cross-sectional diameter smaller than the diameter of...

Embodiment 3

[0084] The thickness of the hafnium corrosion plate type monitoring sample in this embodiment is 3.05mm, the width is 20.1mm, the length is 30.1mm, the aperture is 2.2mm, the grain size level is ≥10, and the grain size level is in accordance with GB / T6394 Metal Average Grain Particle size determination method" to determine;

[0085] The mass percentage content of zirconium in the hafnium corrosion plate type monitoring sample is 0.12% to 0.13%, the mass percentage content of nitrogen is 0.001% to 0.002%, the mass percentage content of hydrogen is 0.003% to 0.004%, and the mass percentage of oxygen is 0.003% to 0.004%. The mass percentage is 0.006% to 0.009%.

[0086] The preparation method of the hafnium corrosion plate type monitoring sample of the present embodiment comprises the following steps:

[0087] Step 1: Process a plurality of hafnium crystal bars with a diameter of 25 mm to 35 mm into hafnium electrodes with a cross-sectional diameter smaller than the diameter of ...

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Abstract

The invention discloses a hafnium corrosion plate type monitoring sample, which has a thickness of 3.00 mm to 3.05 mm, a width of 19.9 mm to 20.1 mm, a length of 29.9 mm to 30.1 mm, an aperture of 2.2 mm, and a grain size grade ≥ 10; The mass percentage of zirconium is 0.10% to 0.15%, the mass percentage of nitrogen is 0.001% to 0.002%, the mass percentage of hydrogen is 0.003% to 0.005%, and the mass percentage of oxygen is 0.002% to 0.009% %. In addition, the invention also provides a method for preparing a hafnium corrosion plate type monitoring sample. The hafnium corrosion plate type monitoring sample of the present invention has small size deviation, high precision, finer crystal grains, stable and uniform main chemical composition. Compared with the existing plate type monitoring sample, the corrosion performance uniformity and stability of the hafnium corrosion plate type monitoring sample of the present invention are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of hafnium processing, in particular to a hafnium corrosion plate type monitoring sample and a preparation method thereof. Background technique [0002] Hafnium metal is an important strategic material, mainly used in the nuclear industry. Since the six isotopes of hafnium all have high neutron absorption efficiency, and the physical efficiency will not decrease significantly under long-term irradiation, so hafnium It is an ideal neutron absorber material. At the same time, hafnium has superior machinability and excellent corrosion resistance, so it can be adapted to the harsh high pressure water reactor environment. [0003] Due to the particularity and importance of the application field, designers and users have put forward higher requirements on the corrosion stability of hafnium, that is, the hafnium needs to be loaded into the corrosion monitoring sample during the corrosion test, and the monitoring s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N1/36C22C27/00C22C1/02C22F1/02C22F1/18
CPCG01N1/28G01N1/286G01N1/36C22C27/00C22C1/02C22F1/02C22F1/18G01N2001/366
Inventor 蔡文博姚修楠陈昊赵鸿磊张录强陈俊喜刘西锋范晔邢健
Owner 西安诺博尔稀贵金属材料股份有限公司
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