The development of the world economy is inseparable from the use of knowledge-intensive high technology. The competitiveness of any industry in the 21st century depends on the use of "materials of the future" - non-alternative raw materials with exceptional qualities. Aviation, space technology, nuclear power, electrical engineering, military industry, machine building and electronics today are unthinkable without refractory metals. This group of materials also includes rhenium wire.

Production

Rhenium wires are produced using the powder metallurgy process. First a stack is made. Then it is heated and forged on a special forging rotary machine. This is how rods with a diameter of 2-3 mm are obtained, which are then, due to the high plasticity of rhenium, drawn into an ultra-thin wire with a diameter of up to several microns.

Applications of

Rhenium is a non-alternative structural material for the production of nodes and parts of special equipment, designed to work in harsh environments at t ° above 1000 ° C. Of rhenium alloys make filaments, grids, cathode preheaters in the electron beam tubes, receiving-amplifying and generating tubes, thermionic generators; filaments in mass spectrometers and ion gauges and other similar devices. In geodetic devices, stable operation of optical or mechanical assemblies mounted on thin metal hangers is important. Such hangers are found in levels, theodolites, and gyrotheodolites. In the most precise ones, the hangers are wires or thin ribbons made of rhenium alloys. For measuring the highest temperatures (up to 2500°C), thermocouples made of rhenium and tungsten alloys are used. They are significantly more accurate than standard tungsten + molybdenum thermocouples. Thermocouple wire is made from rhenium-tungsten alloy grades BP-20 (20% rhenium), as well as BAP-5 (with aluminum and silica additives and 5% rhenium) or BP-5 (with 5% rhenium), which is obtained by powder metallurgy. The thermocouple thermocouple thermoelectric strength (tEF) of a round section of rhenium wire, taken from different ends of the same wire section - at t° 1550±20°C does not exceed 50 μV. Thermocouple wire BP5/BP20 has different nominal t.c.s. values, which are reflected in the graduation. Tungsten/rhenium thermocouples are supplied in ceramic and molybdenum sheaths. The BAP-5 (BP-5) thermocouple is supplied only together with the BP-20 thermocouple electrode, which have the same statistical characteristic and are taken from the same series. The operating temperatures are 1400-2300°C. In incandescent bulbs, a dark fouling appears on the inside of the glass over time. This is the end result of the so-called water cycle. No matter how thoroughly you evacuate the air from the lamp, some water vapor always remains. At high temperature, water dissociates into hydrogen and oxygen; oxidizing the red-hot tungsten filament. The tungsten oxide evaporates, and is deposited on the glass as metallic tungsten reduced by hydrogen. In this way, tiny particles of tungsten evaporate from the filament, forming a dark stain on the glass, and the filament itself becomes thinner and thinner until it breaks off. Rhenium is twice as stable at 1300 °C and 8 times more stable at 1750 °C than tungsten in the water cycle. Alloys of tungsten with rhenium are much better suited for making filaments than pure tungsten.

Supply

We supply certified rhenium round and wire. The specification includes data on the percentage composition and mechanical properties of the products. We make it easy to buy any semi-finished product in bulk for large-scale production. We also cooperate with retail buyers. High level of service and responsiveness of service is the face of our company.

Buy at a bargain price

Evek GmbH has an unlimited assortment of rhenium rolled products of the highest quality. We offer special purpose alloys at the best price. If you are interested in our offer, please contact your nearest office. Qualified specialists will provide all necessary information regarding products, price range, sales conditions. The cost of goods depends on the parameters of products and additional terms of delivery.