Hafnium corrosion plate type monitoring sample and preparation method thereof

Abstract

The invention discloses a hafnium corrosion plate type monitoring sample, which has the thickness of 3.00 mm to 3.05 mm, the width of 19.9 mm to 20.1 mm, the length of 29.9 mm to 30.1 mm, the pore diameter of 2.2 mm and the grain size grade of more than or equal to 10. The mass percentage content of the zirconium is 0.10%-0.15%, the mass percentage content of the nitrogen is 0.001%-0.002%, the mass percentage content of the hydrogen is 0.003%-0.005%, and the mass percentage content of the oxygen is 0.002%-0.009%. In addition, the invention also provides a preparation method of the hafnium corrosion plate type monitoring sample. The hafnium corrosion plate type monitoring sample disclosed by the invention is small in size deviation, high in precision, finer in crystal grain and stable and uniform in main chemical components. Compared with an existing plate type monitoring sample, the hafnium corrosion plate type monitoring sample has the advantage that the corrosion performance uniformity and stability are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of hafnium processing, and in particular relates to a hafnium corrosion plate type monitoring sample and a preparation method thereof. Background technique [0002] Metal hafnium is an important strategic material, mainly used in the field of nuclear industry, because the six isotopes of hafnium have high neutron absorption efficiency, and the physical efficiency will not decrease significantly when used 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 adapt to the harsh high-pressure water reactor environment. [0003] Due to the particularity and importance of the application field, the design and user have put forward higher requirements for the corrosion stability of hafnium, that is, the hafnium must be loaded with a corrosion monitoring sample while performing the corrosi...

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.

Images