Springs is a common life in daily life, its work is mainly reflected in the electronic, resistant to air, steam, water and other corrosive media and acid, alkali, salt and other chemical corrosion medium corrosion of stainless steel spring, according to the spring material properties can be divided into more Type of spring, and the use of daily life, lead to spring fatigue What is the reason?
In general, the higher the yield strength of the material, the higher the fatigue strength, so in order to improve the fatigue strength of the spring should try to improve the yield strength of the spring material, or use the yield strength and tensile strength ratio of high material.
Secondly, the surface quality of the spring has a great influence on the fatigue strength. Springs in the rolling, drawing and rolling process caused by cracks, defects and scars and other defects are often caused by spring fatigue fracture reasons.
The higher the likelihood of defects caused by various cold working and hot working processes, the greater the likelihood of surface defects, and these causes the fatigue performance to deteriorate. Therefore, the effect of the size effect is taken into account when calculating the fatigue strength of the spring.
Corrosion conditions work under the spring, in order to ensure its fatigue strength, can use high corrosion resistance materials, such as stainless steel, non-ferrous metal, or surface plus protective layer, such as coating, oxidation, spray, paint and so on. Practice shows that cadmium can greatly improve the fatigue limit of the spring.