Tension spring refers to a spring that can work in weakly corrosive media such as electronics, air, steam, and water, and chemically corrosive media such as acids, alkalis, and salts. In many working environment requirements such as chemical machinery and electronics, it is an elastic element that is corrosion-resistant, resistant to medium temperature and non-magnetic. The tension spring can produce relatively large elastic deformation when it is loaded, converting mechanical function or kinetic energy into elastic potential energy. When unloaded, the deformation of the tension spring will disappear and return to its original state, transforming the deformation energy into mechanical function or kinetic energy.



Tension spring has excellent general functions, such as: mechanical function (especially elastic limit, strength limit, yield ratio), elastic reduction function (that is, elastic reduction function, also known as anti-loosening function), fatigue function, hardenability , Physical and chemical functions (heat resistance, low resistance, oxidation resistance, corrosion resistance, etc.). In order to meet the above functional requirements, the tension spring has excellent metallurgical quality (high purity and uniformity), excellent appearance quality (strict control of appearance defects and decarburization), precise shape and size.

Generally, cylindrical springs are simple to manufacture, so they can be made into various types according to the load conditions, with simple structure and the most widely used. Generally speaking, tension springs should have high elastic limit, fatigue limit, impact toughness and excellent heat resistance and corrosion resistance. Commonly used spring wire with a diameter of less than 20 mm is cold-rolled. After the tension spring is made, it must be pressed or polished to improve the load-bearing capacity and surface finish of the spring.