Special shaped steel wire refers to non-circular steel wire with cross section. Including flat, rectangular, oval, square, triangular, trapezoidal and other special shaped section. Profiled steel wire, like other steel wire, is made of hot rolled wire as raw material, drawn by cold drawing or cold rolling, and cold rolling is usually made by roll mould technology. Its use is very extensive, mainly in machinery processing industry, textile industry, sealing wire rope, structural steel wire and nail wire etc..
A steel wire with a specified cross section except a circle. Section shape of profiled wire common were square, hexagonal, octagonal, flat, triangular, trapezoidal, semi circle, Z shape etc.. The steel wire has the advantages of accurate cross section shape, high dimensional accuracy, smooth surface and high yield. It is an ideal raw material for making some precision parts. In addition, it is also used in the production of wire rope. According to the requirements, the special-shaped steel wire can be used as spring steel, carbon structural steel, carbon tool steel, alloy structural steel, alloy tool steel, bearing steel and stainless steel wire rod as raw materials. Compared with round steel wire of the same grade, the particularity of producing special-shaped steel wire is mainly reflected in the forming process.
The forming of special-shaped steel wire is generally divided into two stages, that is, firstly, the wire rod is drawn into a round section billet with a certain diameter, then the round cross section billet is processed into a special-shaped steel wire. The size of wire blank directly affects the dimensional accuracy and tensile strength of finished yarn, so it must be rationally selected. The deformation passes needed for the finished billet are determined by the shape of the profiled steel wire, the cold working property of the steel wire and the processing method, etc., usually 2~4 lanes. The aspect ratio of large flat wire can reach 6 ~ 8.
