A brief introduction to spring steel wire

Spring steel wire is a kind of steel wire used to make spring or wire form. According to the different uses of the spring, there are various types of spring steel wires required for springs, such as spring steel wires for mattress springs (referred to as mattress steel wires) with lower requirements, spring steel wires for shock absorbers, and spring steel wire for camera shutters. Although there is no unified standard classification name, the quality requirements of these steel wires are different. Spring steel wires can also be classified according to the manufacturing process, such as raw-drawn spring steel wire (without lead bath quenching treatment before drawing), galvanized spring steel wires, oil-quenched spring steel wires, etc. Springs used in different environments have different special requirements for spring steel wires. For example, springs working in corrosive media require good corrosion resistance; springs in precision instruments require long-term stability and sensitivity; springs in high temperature environments require sufficient elastic limit and creep resistance. In addition, the forming process and heat treatment process of the spring steel wires should also be considered. The cold drawn spring steel wire and the oil quenched and tempered spring steel wires are directly wound into the spring with the steel wires in the supply state, and the springs are directly used after stress relief treatment after forming. The tensile strength of cold drawn spring steel wires is slightly higher than that of oil quenched and tempered steel wire. Large-size cold-drawn steel wires have too much elasticity, and it is difficult to wind the springs, so the size of cold-drawn spring steel wires is generally less than 8.0mm, and the size of oil-quenched and tempered steel wires is generally less than 13.0mm.