Vanadium wire

The vanadium wire is produced by melting high-purity metallic vanadium under vacuum arc or electron beam and then drawing it. The resistivity of the vanadium wire is approximately 25.6 nΩ·m. The vanadium wire possesses excellent corrosion resistance, high-temperature stability and low neutron absorption properties. The tensile strength of pure vanadium wire is 300 - 600 MPa, and it can be cold-drawn to a fine wire with a diameter of less than 0.05 mm. However, the vanadium wire is prone to oxidation at high temperatures, and it requires argon protection and intermediate annealing.

The production of vanadium wire starts with ≥99.5% high-purity vanadium powder or vanadium ingots. It undergoes vacuum arc or electron beam melting for purification and is cast intoΦ100 - 200 mm ingot blanks. Then, it is hot forged and hot rolled intoΦ8 - 15 mm vanadium rods under argon protection at 1000 - 1200 °C. The vanadium rods are subjected to multiple cold drawing processes of "coarse drawing → 800 - 1000 °C vacuum annealing → fine drawing → 700 - 900 °C finished annealing" to gradually reduce the diameter to below 0.05 mm. Throughout the process, graphite and MoS₂ are used as lubricants and the deformation amount per single pass is controlled to be ≤ 20% to prevent breakage. Subsequently, the oxide layer is removed by acid washing in HF + HNO₃. Nickel/gold plating or electrolytic polishing can be performed as needed. Finally, after laser diameter measurement and GDMS purity testing, the wire is vacuum or filled with argon and wound around the axis for packaging. The entire process focuses on high vacuum, inert atmosphere and precise annealing to ensure the low oxygen content, fine-grained structure and excellent mechanical properties of the vanadium wire.

The advantages of vanadium wire lie in its resistance to acid and alkali seawater, its ability to maintain performance at temperatures above 1000 °C, and its ability to be extremely fine; its disadvantages are the high cost of raw materials and the need for multiple annealing processes during the processing of vanadium wire. The price fluctuations of vanadium wire are driven by the demand for steel and new energy. Over 90% of the world's vanadium comes from vanadium-titanium magnetite mines in China, Russia, and South Africa. In the future, efforts will focus on nano-vanadium wire, high-purity fine wire, and recycling technologies to reduce costs and increase efficiency.

Fortu Tech can produce and process Vanadium billet, Vanadium sheet, Vanadium foil, Vanadium plate, Vanadium tubes, Vanadium target.