1.Introduction
Cold-drawn steel wire is a kind of cold working process of steel wire,made through mechanical drawing and dies, and then cut into small pieces.It has a good surface,high density and high strength. It can be divided into round, square and hexagonal steel wire.Cold drawn steel wire has been widely used in the automotive industry, electronics industry, aerospace industry, machine tool industry and fastener industry.
2.Features
1) Cold drawn steel wire has high tensile strength and strong wear resistance.
2) It has accurate size and good mechanical properties.
3) This kind of steel possesses a high strength-to-weight ratio, which makes it very suitable for various applications.
4) Cold drawn steel wire has excellent surface finish and is suitable for processing machines with high speed and high precision.
3.Specifications
Cold drawn steel wire is usually specified according to the GB/T342-1997 standard.According to this standard, the round cold drawn steel wire and square cold drawn steel wire should be in a diameter range of 0.8mm to 6.0mm,and the hexagonal cold drawn steel wire should be in a diameter range of 1.0mm to 8.0mm.The tolerance tolerance of the steel wire should be within 0.01mm.
4.Applications
Cold-drawn steel wire is widely used in common applications such as the suspension systems, steering systems and door closures in the automotive industry,the connectors in the electronics industry,the internal structure components in the aerospace industry and the transmission system components in the machine tool industry.And it is used as a material of screws in the fastener industry as well.
5.Manufacturing Process
The manufacturing process of cold-drawn steel wire mainly comprises of wire drawing, heat-treatment, peeling and cutting.
1) Wire drawing: The raw material should be heated before it get drawn at the right speed and tension.
2) Heat-treatment: The heat-treatment can improve the mechanical properties of the drawn wire.
3) Peeling: The purpose of this step is to improve the surface finish and to eliminate surface defect.
4) Cutting: This step is to cut the drawn wire into small pieces according to customers requirement.
6.Conclusion
Cold drawn steel wire is a kind of steel wire made by cold working process,characterized by high tensile strength, wear resistance and good mechanical properties, thus being widely used in various industries. It can be divided into round, square and hexagonal steel wires, and it should be specified according to the GB/T342-1997 standard.The manufacturing process of cold drawn steel wire comprises of wire drawing,heat treatment, peeling and cutting.
