wire(redirected from wrought wire)
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a lengthy metal product having a very small ratio between length and cross-sectional size (smaller than that of any other metallurgical semifinished product). The cross section of a wire can be circular and, less frequently, hexagonal, tetragonal, trapezoidal, or oval. Wire is manufactured from steel, aluminum, copper, nickel, titanium, zinc, and their corresponding alloys, as well as from refractory and noble metals; bimetallic and polymetallic wire is also manufactured.
There are two stages in wire manufacturing: (1) preparation of a billet and (2) drawing of the billet into wire of final dimensions. Billets made of steel or copper or of nickel, aluminum, or titanium alloys are primarily obtained by hot rolling. Billets made of pure aluminum, zinc, and certain copper alloys are prepared by continuous casting, while those made of noble metals, bimetals, and polymetals are obtained by pressing; pressing is also used to prepare billets of aluminum and nickel alloys in small-scale production. Refractory metals, for example, tungsten, are shaped into billets by the rotary forging of sintered powder fillets.
Wire is manufacured with diameters ranging from 0.005 to 17 mm and with various surface qualities, including dark, light, ground, and polished surfaces. In many cases, wire is subjected to heat treatments, for example, annealing, normalizing, or hardening. Steel wire may have an anticorrosive coating; it may be galvanized, tinned, oxidized, or lacquered.
Wire is used in the manufacture of electric conductors, hardware, springs, precision drills, thermocouples, electrodes, and terminals of electronic equipment.
M. Z. ERMANOK