Annealed wire is a kind of soft iron wire product made of low carbon steel by cold drawing, heating, constant temperature, heat preservation and other processes. The composition of iron wire varies according to its use. It contains iron, cobalt, nickel, copper, carbon, zinc and other elements. The hot metal billet is rolled into 6.5mm thick steel rod, that is, wire rod, and then put into the drawing device to draw into different diameter lines, and gradually reduce the diameter of the drawing disc, cooling, annealing, coating and other processing processes to produce various specifications of wire.