Metal Wire Production
Currently, the production of wire is carried out according to the technology of drawing - pulling a metal blank through a tool that has a hole of a certain shape. Another technology for the production of metal wire is continuous casting and rolling. In earlier periods, various methods were used for the production of wire - flattening, forging, rolling and others, but at present they are not used.
To date, the most technologically advanced method of manufacturing metal wire is the drawing process - on special equipment, a metal billet is pulled or pushed through one or a number of tools that have a hole of a special profile - filler. As the wire is pulled, the wire stock decreases in diameter and elongates; to significantly reduce the diameter of the stock, the wire is drawn through a series of holes of decreasing diameter. Depending on the use of lubricating fluids in the wire drawing process, a distinction is made between dry drawing, in which no liquids are used, and wet drawing, in which the wire is drawn with lubricant. After being drawn, the wire can be heat treated to increase its strength or impart certain physical properties.
What is the Wire Made from?
Wire is made from various metals - steel, aluminum, copper, as well as many other metals and alloys. Copper and aluminum are used to make wires with high electrical conductive properties, aluminum and copper wires are used for the manufacture of wires, cables and conductive parts of various electrical equipment. At the same time, it is worth remembering that, although copper has a higher electrical conductivity, due to its low price, aluminum wire has become more common as a material for cables and wires.
But the bulk of the wire is made of steel and alloys based on it with the addition of various amounts of alloying elements. Steel wire is the most common and is used in all industries - industry, construction and many others. High temperature resistance wire is made from tungsten or molybdenum-added alloys - tungsten wire can withstand heating up to more than 2000°C without reducing its strength. Unlike wires and cables, which require high electrical conductivity, heating elements require the opposite - high electrical resistance, such properties are possessed by nichrome wire and fecral wire, made from alloys with a high content of nickel, chromium, iron and aluminum.
Wire Coating and Surface
The wire is produced both uncoated and coated with various materials, while the coating of the wire can serve various purposes. So, steel wire is coated with phosphates or zinc to protect against corrosion, and there are various ways of coating the wire with zinc, copper wire is varnished to give its surface dielectric properties, and welding wire is produced with a copper coating to improve its electrical properties and uniformity of the welding process with its use. The surface of the produced wire can be black (raw), light, ground or even polished, depending on what such wire will be used for.