The preparation method of high purity vanadium wire, by using electron beam melting and continuous electrolytic polishing technology, the prepared vanadium wire has high purity, good mechanical properties and surface quality, reduces the content of trace element impurities in vanadium metal, improves the mechanical properties and processing properties of vanadium metal material, the purity of the vanadium wire is 99.9%, the tensile strength is greater than 725Mpa and the elongation is greater than 7.6%. With a surface roughness of Ra0.2, it can be used for nuclear testing and 3D printing.
As a metal vitamin, vanadium metal is widely used in aerospace, steel, chemical industry, medicine, nuclear industry and other fields with its excellent physical and chemical properties, and has become a rare metal with important strategic significance in the world. Vanadium metal has typical low activation characteristics, high purity vanadium has good plasticity, ductility and corrosion resistance, and has low neutron irradiation activity, high heat transfer rate, low thermal expansion coefficient, excellent high temperature strength, anti-radiation swelling and other advantages, so it has become one of the candidate materials in the field of nuclear power.
Therefore, the preparation technology of high purity vanadium and the mechanical properties and microstructure characteristics of pure vanadium at high temperature were studied. In particular, vanadium wire for neutron detection, as the key material of self-energy detector, requires V≥99.8% purity, tensile strength ≥600Mpa and elongation ≥5% in mechanical properties. At present, the purity, mechanical properties and surface quality of high purity vanadium wire on the market are difficult to meet the application requirements of self-powered detectors.
The high purity vanadium wire obtained by the method of the invention has the advantages of high purity, uniform structure, good mechanical properties and good surface quality. The process of powder metallurgy is as follows: vanadium powder pretreatment → press forming → vacuum sintering → electron beam melting → envelope forging → rotary forging → drawing → continuous electrolytic cleaning → annealing treatment.
