(1) Surface pretreatment: For the wire with dirty surface and more impurities, it must be cleaned and dried before drawing; for the wire with more oxide scale on the surface, it must be acidified and dried first. Drawing after drying; for the wire with peeling, pits, heavy skin and other phenomena on the surface, it must be grinded by a grinder before drawing;

(2) Heat treatment: For wires with excessive hardness or uneven hardness, the hardness should be reduced by annealing or tempering first, and the wire can be drawn after maintaining good hardness uniformity.

For the treated wire, it is helpful to better ensure the service life of the wire drawing die and the high smoothness and high quality of the wire surface.