The general order of the spring material selection considerations are: Law and regulation requirements, environmental medium, working temperature, service life and safety, the form of load bearing, state of stress, stress intensity, process performance, material source, other special requirements, material price, etc.
The hot forming process is generally adopted in the production of large diameter spring, and the elastic small diameter spring with the complex shape and high precision has the cold forming process of the material after heat treatment. High stress, long lifecycle and high reliability spiral spring, plate spring and elastomer products need to optimize the actual work of the workpiece stress and the use of special-shaped section, variable cross-section and other High-strength materials to achieve high-quality product requirements.
The materials of medium and small spring, in particular, helical tensile springs, should be given priority to the reinforcement of steel wire, lead bath isothermal cold drawn steel wire and oil quenching tempering steel wire because they have stable quality, high strength and good surface quality, fatigue performance is higher than ordinary quenching tempering steel wire.
What kind of material does spring usually use?
Mechanical spring is to make full use of the physical properties of materials to save energy and release energy through certain conversion mode. The material determine the physical and mechanical properties of spring, and affect the design and development of spring and the improvement of special performance requirements.
The most commonly used materials are two major categories: metal materials and non-metallic materials. The rapid development of modern new materials, especially the continuous improvement of new high strength metal alloy, make the mechanical spring have higher efficiency. Meanwhile, the continuous optimization of raw materials, such as structure shape, heat treatment and surface quality, can meet its functional requirements for the application and development of spring , and further improve the safety, economy and environmental protection of spring products.
With the rapid development of chemical rubber industry in recent years, polyurethane materials are widely used in spring products, to reduce vibration, noise reduction; Air spring with nitrogen or gas-liquid as the medium is also widely used in stamping die, host damping, constant force apparatus, ultra-high temperature elastic structure and other fields.
The commonly used metal materials are: spring steel, Spring stainless steel, Spring copper alloy, nickel and nickel alloy, Spring elastic alloy, spring with other special alloys and recently developed super pure spring steel. Commonly used non-metallic materials are: polyurethane, rubber, plastic, carbon fiber, gas and other special materials.