The manufacturing craft of spring steel wire is varied, but the main crafts are two kinds: cold forming and hot forming.
Cold forming process in the spring, the spring production mainly applied the oil-tempered spring steel wire, Cold-drawn strengthen spring steel wires and so on. During the process of making these kinds of spring steel wires to spring, it doesn't need the special heat treatment, in stead of it which is stress relief annealing. The design working stress of design is related to spring steel wire's performance. The cold forming usually applied to the spring which shape is complex and the diameter of spring steel wire is smaller, for example, one is < 15mm. The characteristics of cold forming are that the process is simple and the condition of deformation and decarburization can avoid.
Cold forming process in the spring, the spring production mainly applied the oil-tempered spring steel wire, Cold-drawn strengthen spring steel wires and so on. During the process of making these kinds of spring steel wires to spring, it doesn't need the special heat treatment, in stead of it which is stress relief annealing. The design working stress of design is related to spring steel wire's performance. The cold forming usually applied to the spring which shape is complex and the diameter of spring steel wire is smaller, for example, one is < 15mm. The characteristics of cold forming are that the process is simple and the condition of deformation and decarburization can avoid.
The mainly materials are hot-rolled spring steel wire, annealed material, annealing cold-drawn materials in the spring hot forming process. Making spring with these materials needs to heat quenching and tempered heat treatment. The design working stress of design is related to spring steel wire and the heat treatment craft. Hot forming usually applied to the spring which shape is simple and the diameter of spring steel wire is relatively bigger. Hot forming process is characterized by a larger value-added effect of products, and can produce spring with large diameter.