What is the reason of Sofa spring can not afford to deform ?

- Nov 04, 2017-

           The Sofa spring works according to Huck's law, but if it is stretched elastically for a long time, it will cause irreversible deformation loss to the sofa spring. As a metal material, it has its fatigue stress range. If it is fatigue for a long time Which will make the material deformation, aging, resulting in deformation and effectiveness.