Wave spring – Metal Wire Forms Custom https://www.metalwireforms.com Custom Compression Spring, Torsion Spring, Tension Spring, Metal Hook, Metal Handle, Metal Clip Sat, 09 Oct 2021 03:29:38 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://www.metalwireforms.com/wp-content/uploads/2021/09/cropped-LOGO-top-32x32.png Wave spring – Metal Wire Forms Custom https://www.metalwireforms.com 32 32 How should users choose suitable spring materials https://www.metalwireforms.com/how-should-users-choose-suitable-spring-materials.html Thu, 31 Dec 2020 13:10:43 +0000 http://furniture.oceanwp.org/?p=452 The choice of spring material should be determined according to factors such as the nature of the spring’s load, the state of stress, the magnitude of the stress, the working temperature, the environmental medium, the service life, the requirements for conductive and magnetic properties, the process performance, the source of the material, and the price of the spring.
When determining the cross-sectional shape and size of the material, the series of dimensions stipulated by the international standards should be selected first, and materials with non-standard series specifications should be avoided as far as possible.
Medium and small springs, especially spiral tension springs, should be given priority to steel wires that have been strengthened, lead bath isothermal cold drawn steel wires and oil-quenched tempered steel wires.
How to choose the spring material correctly?
The carbon spring steel wire and piano wire produce a large residual stress after cold drawing. After the spring is processed, there is a large residual stress. After tempering, the size changes greatly, and it is difficult to control the dimensional accuracy. Oil-quenched and tempered steel wire is modulated and strengthened after the steel wire is drawn to the specified size. There is basically no residual stress. After the formed spring is tempered at low temperature, the size change is small, and the heat resistance stability is better than that of the cold-drawn reinforced steel wire.
Large and medium-sized springs, cold-drawn or cold-drawn polished steel should be used for high load accuracy and stress. For springs with lower load accuracy and stress, hot-rolled steel can be used.

The material cross-section of the coil spring should be a circular cross-section first. Square and rectangular cross-section materials have strong bearing capacity, good impact resistance, and can reduce the size of the spring. However, the material sources are few and the price is high. Except for special needs, generally try not to choose this material. In recent years, the development of flattened round steel wire instead of trapezoidal steel wire has achieved good results.
The spring material that works at high temperature requires good thermal stability, resistance to relaxation or creep, resistance to oxidation, and resistance to certain medium corrosion.
The spring material used at low temperature should have good low temperature toughness. Austenitic stainless steel spring steel wire such as carbon spring steel wire and piano wire, copper alloy and nickel alloy have good low-temperature toughness and strength.
At low temperatures, the brittleness of the material is very sensitive to surface defects. Therefore, the surface quality of the material should be strictly required.
At low temperatures, the environmental media will corrode the material much less than in the greenhouse, and cadmium and zinc plating can easily cause cold embrittlement.
At low temperatures, the elastic modulus and expansion coefficient of the material does not change much, so it can be ignored in the design.

]]> What are the methods to prolong spring service life https://www.metalwireforms.com/what-are-the-methods-to-prolong-spring-service-life.html Thu, 31 Dec 2020 13:10:43 +0000 http://furniture.oceanwp.org/?p=453
  • Austempering of the spring.
    For springs with smaller diameters or satisfactory hardenability, austempering can be used, which can not only reduce decentering, but also improve strong resistance. It is best to perform another tempering after austempering to increase the elastic limit. The tempering temperature is the same as the austempering temperature.
  • Deformation heat treatment.
    Thermomechanical heat treatment is a combination of steel deformation strengthening and heat treatment strengthening to further improve the strength and resistance of steel. Thermomechanical heat treatment is divided into high temperature, medium temperature and low temperature. High temperature deformation heat treatment is quenched immediately after deformation in a stable austenite state, or can be combined with forging or hot rolling, that is, quenched immediately after hot forming.
  • The loose treatment of the spring.
    If the spring is operated under external force for a long time, slight plastic deformation will occur due to the loosening of the stress. Especially for the spring operated at high temperature, the stress loosening phenomenon is more serious at high temperature, which reduces the accuracy of the spring. This is not the case for general fine springs. Allowed. Therefore, this type of spring should be loosened after quenching and tempering. Heat treatment process: pre-load the spring so that its deformation exceeds the deformation that may occur during operation of the spring. Then heat it at 20℃ higher than the operating temperature for 8~24h.
  • Shot peening.
    Shot peening is one of the most widely used methods to improve the appearance of springs. Springs require high appearance quality. Surface defects such as scratches, folds, and oxidative decarburization tend to become local and fatigue fracture sources of stress concentration during spring operation. If fine steel shots are used to spray the surface of the spring at a high speed and perform shot peening, it will not only improve the appearance of the spring, but also increase the strength of the appearance and make the appearance in a state of compressive stress, thereby increasing the fatigue strength and service life of the spring.
  • Low temperature carbonitriding.
    Regarding the coil spring, the combination of tempering and low-temperature carbonitriding (nitrocarburizing) technology can significantly improve the fatigue life and corrosion resistance of the spring.
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