1, lead bath treatment of cold drawn steel wire
First, the steel wire is drawn three times, the total deformation of 50%, and then heated to Ac3 above the temperature to its austenitizing, followed by 450-550 ℃ lead bath isothermal treatment, austenite into sorbite The Yield strength of 1600Mpa, cold roll forming, annealing at 200-300 ℃ to eliminate stress.
2, oil quenching and tempering steel wire
After the wire is drawn to the processing size, the oil is quenched and tempered. The strength of such wire is not as good as that of lead bath, but the performance is uniform and the cost is low. After cold roll forming, the stress treatment is carried out.
