Carbon spring steel wire is usually used for Simmons bed, vehicles and various cushions, machine manufacturing, electric tools, sports equipment, electrical equipment and so on. The line diameter usually ranges from 0.20 millimeters to 6.50 millimeters. The materials of carbon spring steel wire usually are the steel wires of 65#,70#\65Mn\82B\72A and 72B. The characteristics of these steel wires are low plasticity, flexibility strong, powerful anti-stress.
Carbon spring steel wires can be divided into two types according to existing national and industrial recommended standards.
spring steel wires is cold-drawn spring steel wire. Cold-drawn spring steel wires obtained the sorbite organization. Then use phosphate to the surface, to a large rate cut surface drawing to finished size. Cold-drawn spring steel wire has high precision size, smooth surface, no oxidation and decarbonization defects, is the most widely used spring steel wire.
Another is spring steel wire. Oil-tempered spring steel wires can obtain a good comprehensive mechanical property by quenching and tempering treatment. Oil-tempered spring steel wire can get better performance than cold-drawn spring steel wire as long as the complete quenching. Under the condition of same tensile strength, Oil-tempered spring steel wire has a higher elastic limit than cold-drawn spring steel wire.
In recent years, oil-tempered spring steel wire is going to replace Cold-drawn spring steel wire.