Sheet, strip rhenium
Pure rhenium is very ductile and can roll out in a thin foil. Rhenium sheets are due to the «hot-cold» deformation. The only difference is in the geometry of the original material — it’s not a rod billet of square section, powder-procurement flat form. Originally compact metal can be given the required form using standard operations, for example, forging, bending or punching. Since the temperature optimal for deformation, rhenium oxidizes rapidly, it is heated in a protective atmosphere, usually hydrogen, and the processing time minimized. The preform is heated to a high temperature and subjected to forging, and then rolled. To avoid cooling of the metal, rolling runs with great speed. When rolling use shell plating sheet other metals. As the transformation into a thin sheet, the temperature of the rolling is reduced. Laminate sheet has a very smooth surface, it is possible to forge and extrude into industrial products in different forms. The sheets surface is cleaned from oxides by washing in a special hot sodium hydroxide solution or by calcination in a hydrogen atmosphere at 1000 °C. the Rhenium complex parts can be produced with the machining of porous sintered rhenium blanks impregnated with copper. After sintering the product in a vacuum, the copper is removed and the rhenium compacted to 90% density.
Rhenium sheet used in electrical engineering and metallurgy for the production of various electric heating elements with high resistance and stable performance. Most often these elements are manufactured from strips with a thickness of 5−20 microns. The tape and strip are used for the manufacture of countervailing wires and standards of resistance, which usually use tungsten-rhenium alloy.
The percentage of alloy
|Re||W||Mo||t° melting °C|
Of rhenium tape make self-cleaning electrical contacts. With the closure of the open circuit electric discharge oxidizes the metal contact. Similarly, oxidized and rhenium, but its oxide is volatile and evaporates from the level of the contact surface, so that the lifetime of electrical equipment is greatly increased. The important instrumentation and other properties of rhenium. Alloys make the cores and measuring instruments of the highest accuracy classes. The core must be non magnetic, solid (as slowly as possible to wear out) and are resistant to corrosion. In surveying instruments (levels, theodolites, gyrotheodolite) to stabilize the optical and mechanical components use the metal hangers from the finest rhenium ribbon or wire. In engineering of single crystal rhenium-containing Nickel alloys of high heat resistance make the blades of gas turbine engines.
Certified supply rhenium sheet and tape. The specification included data on the percentage composition and mechanical properties of products. We can easily buy in bulk any semi-finished products for large-scale production. We also work with retail buyers. A high level of service and speed of service are the face of our company.
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In stock company «Elektrovek-steel» always available to rent from rare and refractory metals at the best price. It is based bets on European non-ferrous metals without incorporating extra cost. Supply certified products of domestic and foreign manufacturers. Cooperation with us gives a number of advantages. Our experts will be happy to provide advice in the purchase of any of the alloys, the correct choice of which will depend on the performance and durability of equipment. We will help to determine not only the optimal parameters of the product, but also offer the best price.